Setup project skeleton

145 files changed, 6758 insertions, 0 deletions

diff --git a/src/drv/CMakeLists.txt b/src/drv/CMakeLists.txt
new file mode 100644
index 0000000..3306d93
--- /dev/null
+++ b/src/drv/CMakeLists.txt
@@ -0,0 +1,28 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv)
+add_subdirectory(event)
+add_subdirectory(tty)
+add_subdirectory(src)
+target_include_directories(drv PUBLIC include PRIVATE private_include)
+target_link_libraries(drv PUBLIC drv_event PRIVATE drv_tty)
+
+if(PS1_BUILD)
+    add_subdirectory(ps1)
+    target_compile_definitions(drv PRIVATE DRV_PS1)
+    target_link_libraries(drv PUBLIC drv_ps1_time PRIVATE drv_ps1)
+endif()
diff --git a/src/drv/event/CMakeLists.txt b/src/drv/event/CMakeLists.txt
new file mode 100644
index 0000000..7d52511
--- /dev/null
+++ b/src/drv/event/CMakeLists.txt
@@ -0,0 +1,18 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_event INTERFACE)
+target_include_directories(drv_event INTERFACE include)
diff --git a/src/drv/event/include/drv/event.h b/src/drv/event/include/drv/event.h
new file mode 100644
index 0000000..5707242
--- /dev/null
+++ b/src/drv/event/include/drv/event.h
@@ -0,0 +1,49 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_EVENT_H
+#define DRV_EVENT_H
+
+#include <sys/types.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+struct drv_event_done
+{
+    int (*f)(int error, void *args);
+    void *args;
+};
+
+struct drv_event_ops
+{
+    int (*read)(void *buf, size_t n, off_t offset,
+        const struct drv_event_done *done, void *args);
+    int (*read_nb)(void *buf, size_t n, void *args);
+    int (*write)(const void *buf, size_t n, const struct drv_event_done *done,
+        void *args);
+    void *args;
+};
+
+struct drv_event
+{
+    int (*status)(const char *node, const struct drv_event_ops *ops,
+        bool available, mode_t mode, void *args);
+    void *args;
+};
+
+#endif
diff --git a/src/drv/include/drv/drv.h b/src/drv/include/drv/drv.h
new file mode 100644
index 0000000..eb8bee0
--- /dev/null
+++ b/src/drv/include/drv/drv.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_H
+#define DRV_H
+
+#include <drv/event.h>
+
+struct drv *drv_init(const struct drv_event *ev);
+int drv_update(struct drv *d);
+void drv_free(struct drv *d);
+
+#endif
diff --git a/src/drv/include/drv/time.h b/src/drv/include/drv/time.h
new file mode 100644
index 0000000..12b213d
--- /dev/null
+++ b/src/drv/include/drv/time.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TIME_H
+#define DRV_TIME_H
+
+#include <time.h>
+
+int drv_time_getres(clockid_t id, struct timespec *ts);
+int drv_time_gettime(clockid_t id, struct timespec *ts);
+int drv_time_settime(clockid_t id, const struct timespec *ts);
+
+#endif
diff --git a/src/drv/private_include/drv/port.h b/src/drv/private_include/drv/port.h
new file mode 100644
index 0000000..cdf30ab
--- /dev/null
+++ b/src/drv/private_include/drv/port.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PORT_H
+#define DRV_PORT_H
+
+struct drv_port;
+
+#ifdef DRV_PS1
+#include <drv/ps1.h>
+#endif
+
+#endif
diff --git a/src/drv/private_include/drv/tree.h b/src/drv/private_include/drv/tree.h
new file mode 100644
index 0000000..da4b7e9
--- /dev/null
+++ b/src/drv/private_include/drv/tree.h
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TREE_H
+#define DRV_TREE_H
+
+#include <drv/drv.h>
+#include <drv/port.h>
+#include <stddef.h>
+
+extern struct drv_port *(*const drv_tree_init[])(const struct drv_event *);
+extern int (*const drv_tree_update[])(struct drv_port *);
+extern void (*const drv_tree_free[])(struct drv_port *);
+extern const size_t drv_tree_n;
+
+#endif
diff --git a/src/drv/private_include/drv/types.h b/src/drv/private_include/drv/types.h
new file mode 100644
index 0000000..959e12d
--- /dev/null
+++ b/src/drv/private_include/drv/types.h
@@ -0,0 +1,30 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TYPES_H
+#define DRV_TYPES_H
+
+#include <stddef.h>
+
+struct drv
+{
+    struct drv_port **ports;
+    size_t n;
+};
+
+#endif
diff --git a/src/drv/ps1/CMakeLists.txt b/src/drv/ps1/CMakeLists.txt
new file mode 100644
index 0000000..08d97c2
--- /dev/null
+++ b/src/drv/ps1/CMakeLists.txt
@@ -0,0 +1,37 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_subdirectory(bios)
+add_subdirectory(cd)
+add_subdirectory(cpu)
+add_subdirectory(dma)
+add_subdirectory(event)
+add_subdirectory(gpu)
+add_subdirectory(irq)
+add_subdirectory(mc)
+add_subdirectory(pad)
+add_subdirectory(rcnt)
+add_subdirectory(sio)
+add_subdirectory(time)
+add_library(drv_ps1)
+add_subdirectory(src)
+target_include_directories(drv_ps1 PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1 PUBLIC c drv_event PRIVATE
+    drv_ps1_cd
+    drv_ps1_mc
+    drv_ps1_pad
+    drv_ps1_sio
+)
diff --git a/src/drv/ps1/bios/CMakeLists.txt b/src/drv/ps1/bios/CMakeLists.txt
new file mode 100644
index 0000000..ebc0937
--- /dev/null
+++ b/src/drv/ps1/bios/CMakeLists.txt
@@ -0,0 +1,19 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_bios)
+add_subdirectory(src)
+target_include_directories(drv_ps1_bios INTERFACE include)
diff --git a/src/drv/ps1/bios/include/drv/ps1/bios.h b/src/drv/ps1/bios/include/drv/ps1/bios.h
new file mode 100644
index 0000000..ca53194
--- /dev/null
+++ b/src/drv/ps1/bios/include/drv/ps1/bios.h
@@ -0,0 +1,128 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef PS1_BIOS_H
+#define PS1_BIOS_H
+
+#include <stdint.h>
+#include <setjmp.h>
+
+#if __GNUC__
+#define PRINTF_ATTR __attribute__ ((format (__printf__, 1, 2)))
+#else
+#define PRINTF_ATTR
+#endif
+
+enum
+{
+    CLASS_IRQ0 = (long)0xf0000001,
+    CLASS_GPU,
+    CLASS_CDROM,
+    CLASS_DMA,
+    CLASS_RTC0  = (long)0xf2000000,
+    CLASS_RTC1,
+    CLASS_RTC2,
+    CLASS_VBLANK,
+    CLASS_CONTROLLER = (long)0xf0000008,
+    CLASS_SPU,
+    CLASS_PIO,
+    CLASS_SIO
+};
+
+enum
+{
+    MODE_EXECUTE = 0x1000,
+    MODE_READY = 0x2000
+};
+
+enum
+{
+    SPEC_COUNTER_ZERO = 1,
+    SPEC_INTERRUPTED = 1 << 1,
+    SPEC_EOF = 1 << 2,
+    SPEC_FILE_CLOSED = 1 << 3,
+    SPEC_COMMAND_ACK = 1 << 4,
+    SPEC_COMMAND_COMPLETE = 1 << 5,
+    SPEC_DATA_READY = 1 << 6,
+    SPEC_DATA_END = 1 << 7,
+    SPEC_TIMEOUT = 1 << 8,
+    SPEC_UNKNOWN_CMD = 1 << 9,
+    SPEC_END_READ_BUF = 1 << 10,
+    SPEC_END_WRITE_BUF = 1 << 11,
+    SPEC_GENERAL_INTERRUPT = 1 << 12,
+    SPEC_NEW_DEVICE = 1 << 13,
+    SPEC_SYSCALL = 1 << 14,
+    SPEC_ERROR = 1 << 15,
+    SPEC_WRITE_ERROR,
+    SPEC_DOMAIN_ERROR = 0x301,
+    SPEC_RANGE_RNG
+};
+
+struct CdAsyncSeekL
+{
+    uint8_t minutes, seconds, frames;
+};
+
+union SetMode
+{
+    struct
+    {
+        uint8_t cdda :1, autopause :1, report :1, xa_filter :1, ignore :1,
+            whole_sector :1, xa_adpcm :1, speed :1;
+    } bits;
+
+    uint8_t mask;
+};
+
+struct CdAsyncReadSector_mode
+{
+    union SetMode mode;
+    union
+    {
+        struct
+        {
+            uint8_t reads :1, :7;
+        } bits;
+    } read;
+
+    uint16_t reserved;
+};
+
+int EnterCriticalSection(void);
+void ExitCriticalSection(void);
+void GetConf(uint32_t *events, uint32_t *tcb, void **stacktop);
+void SetConf(uint32_t events, uint32_t tcb, void *stacktop);
+int OpenEvent(int class, int spec, int mode, int (*f)(void));
+int EnableEvent(int event);
+int DisableEvent(int event);
+int CloseEvent(int event);
+int TestEvent(int event);
+int WaitEvent(int event);
+int CdAsyncGetStatus(uint8_t *response);
+int CdAsyncReadSector(unsigned count, void *dst,
+    struct CdAsyncReadSector_mode mode);
+int CdAsyncSeekL(const struct CdAsyncSeekL *seekl);
+int Printf(const char *fmt, ...) PRINTF_ATTR;
+void SetCustomExitFromException(jmp_buf jmp);
+void CdInit(void);
+void CdRemove(void);
+int SaveState(jmp_buf buf);
+void RestoreState(jmp_buf buf, int value);
+void ReturnFromException(void);
+
+#endif
diff --git a/src/drv/ps1/bios/src/CMakeLists.txt b/src/drv/ps1/bios/src/CMakeLists.txt
new file mode 100644
index 0000000..67ea62b
--- /dev/null
+++ b/src/drv/ps1/bios/src/CMakeLists.txt
@@ -0,0 +1,38 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_bios PRIVATE
+    CdAsyncGetStatus.s
+    CdAsyncReadSector.s
+    CdAsyncSeekL.s
+    CdInit.s
+    CdRemove.s
+    CloseEvent.s
+    DisableEvent.s
+    EnableEvent.s
+    EnterCriticalSection.s
+    ExitCriticalSection.s
+    GetConf.s
+    OpenEvent.s
+    Printf.s
+    RestoreState.s
+    ReturnFromException.s
+    SaveState.s
+    SetConf.s
+    SetCustomExitFromException.s
+    TestEvent.s
+    WaitEvent.s
+)
diff --git a/src/drv/ps1/bios/src/CdAsyncGetStatus.s b/src/drv/ps1/bios/src/CdAsyncGetStatus.s
new file mode 100644
index 0000000..18922da
--- /dev/null
+++ b/src/drv/ps1/bios/src/CdAsyncGetStatus.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global CdAsyncGetStatus
+
+CdAsyncGetStatus:
+    li $9, 0x7c
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/CdAsyncReadSector.s b/src/drv/ps1/bios/src/CdAsyncReadSector.s
new file mode 100644
index 0000000..6411e12
--- /dev/null
+++ b/src/drv/ps1/bios/src/CdAsyncReadSector.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global CdAsyncReadSector
+
+CdAsyncReadSector:
+    li $9, 0x7e
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/CdAsyncSeekL.s b/src/drv/ps1/bios/src/CdAsyncSeekL.s
new file mode 100644
index 0000000..529d116
--- /dev/null
+++ b/src/drv/ps1/bios/src/CdAsyncSeekL.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global CdAsyncSeekL
+
+CdAsyncSeekL:
+    li $9, 0x78
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/CdInit.s b/src/drv/ps1/bios/src/CdInit.s
new file mode 100644
index 0000000..dcf3474
--- /dev/null
+++ b/src/drv/ps1/bios/src/CdInit.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global CdInit
+
+CdInit:
+    li $9, 0x54
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/CdRemove.s b/src/drv/ps1/bios/src/CdRemove.s
new file mode 100644
index 0000000..e3bb34d
--- /dev/null
+++ b/src/drv/ps1/bios/src/CdRemove.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global CdRemove
+
+CdRemove:
+    li $9, 0x56
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/CloseEvent.s b/src/drv/ps1/bios/src/CloseEvent.s
new file mode 100644
index 0000000..7dd47e3
--- /dev/null
+++ b/src/drv/ps1/bios/src/CloseEvent.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global CloseEvent
+
+CloseEvent:
+    li $9, 0x9
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/DisableEvent.s b/src/drv/ps1/bios/src/DisableEvent.s
new file mode 100644
index 0000000..f32dcf8
--- /dev/null
+++ b/src/drv/ps1/bios/src/DisableEvent.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global DisableEvent
+
+DisableEvent:
+    li $9, 0xd
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/EnableEvent.s b/src/drv/ps1/bios/src/EnableEvent.s
new file mode 100644
index 0000000..f6da29d
--- /dev/null
+++ b/src/drv/ps1/bios/src/EnableEvent.s
@@ -0,0 +1,23 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.text
+
+.global EnableEvent
+
+EnableEvent:
+    li $9, 0xc
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/EnterCriticalSection.s b/src/drv/ps1/bios/src/EnterCriticalSection.s
new file mode 100644
index 0000000..c8302e0
--- /dev/null
+++ b/src/drv/ps1/bios/src/EnterCriticalSection.s
@@ -0,0 +1,25 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.text
+
+.global EnterCriticalSection
+
+EnterCriticalSection:
+    li $a0, 1
+    syscall
+    nop
+    jr $ra
+    nop
diff --git a/src/drv/ps1/bios/src/ExitCriticalSection.s b/src/drv/ps1/bios/src/ExitCriticalSection.s
new file mode 100644
index 0000000..198b040
--- /dev/null
+++ b/src/drv/ps1/bios/src/ExitCriticalSection.s
@@ -0,0 +1,23 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global ExitCriticalSection
+
+ExitCriticalSection:
+    li $a0, 2
+    syscall
+    nop
+    jr $ra
+    nop
diff --git a/src/drv/ps1/bios/src/GetConf.s b/src/drv/ps1/bios/src/GetConf.s
new file mode 100644
index 0000000..927b950
--- /dev/null
+++ b/src/drv/ps1/bios/src/GetConf.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global GetConf
+
+GetConf:
+    li $9, 0x9d
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/OpenEvent.s b/src/drv/ps1/bios/src/OpenEvent.s
new file mode 100644
index 0000000..dca7141
--- /dev/null
+++ b/src/drv/ps1/bios/src/OpenEvent.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global OpenEvent
+
+OpenEvent:
+    li $9, 0x8
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/Printf.s b/src/drv/ps1/bios/src/Printf.s
new file mode 100644
index 0000000..9e0a77f
--- /dev/null
+++ b/src/drv/ps1/bios/src/Printf.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global Printf
+
+Printf:
+    li $9, 0x3f
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/RestoreState.s b/src/drv/ps1/bios/src/RestoreState.s
new file mode 100644
index 0000000..c830296
--- /dev/null
+++ b/src/drv/ps1/bios/src/RestoreState.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global RestoreState
+
+RestoreState:
+    li $9, 0x14
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/ReturnFromException.s b/src/drv/ps1/bios/src/ReturnFromException.s
new file mode 100644
index 0000000..6af3bb3
--- /dev/null
+++ b/src/drv/ps1/bios/src/ReturnFromException.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global ReturnFromException
+
+ReturnFromException:
+    li $9, 0x17
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/SaveState.s b/src/drv/ps1/bios/src/SaveState.s
new file mode 100644
index 0000000..eb72ea3
--- /dev/null
+++ b/src/drv/ps1/bios/src/SaveState.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global SaveState
+
+SaveState:
+    li $9, 0x13
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/SetConf.s b/src/drv/ps1/bios/src/SetConf.s
new file mode 100644
index 0000000..5063667
--- /dev/null
+++ b/src/drv/ps1/bios/src/SetConf.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global SetConf
+
+SetConf:
+    li $9, 0x9c
+    j 0xa0
+    nop
diff --git a/src/drv/ps1/bios/src/SetCustomExitFromException.s b/src/drv/ps1/bios/src/SetCustomExitFromException.s
new file mode 100644
index 0000000..75cf8cc
--- /dev/null
+++ b/src/drv/ps1/bios/src/SetCustomExitFromException.s
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.global SetCustomExitFromException
+
+SetCustomExitFromException:
+    li $9, 0x19
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/TestEvent.s b/src/drv/ps1/bios/src/TestEvent.s
new file mode 100644
index 0000000..af0edab
--- /dev/null
+++ b/src/drv/ps1/bios/src/TestEvent.s
@@ -0,0 +1,23 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.text
+
+.global TestEvent
+
+TestEvent:
+    li $9, 0xb
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/bios/src/WaitEvent.s b/src/drv/ps1/bios/src/WaitEvent.s
new file mode 100644
index 0000000..8f58d52
--- /dev/null
+++ b/src/drv/ps1/bios/src/WaitEvent.s
@@ -0,0 +1,23 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+.text
+
+.global WaitEvent
+
+WaitEvent:
+    li $9, 0xa
+    j 0xb0
+    nop
diff --git a/src/drv/ps1/cd/CMakeLists.txt b/src/drv/ps1/cd/CMakeLists.txt
new file mode 100644
index 0000000..9b84541
--- /dev/null
+++ b/src/drv/ps1/cd/CMakeLists.txt
@@ -0,0 +1,27 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_cd)
+add_subdirectory(src)
+target_include_directories(drv_ps1_cd PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_cd
+    PUBLIC
+        c
+        drv_event
+    PRIVATE
+        drv_ps1_bios
+        drv_ps1_event
+)
diff --git a/src/drv/ps1/cd/include/drv/ps1/cd.h b/src/drv/ps1/cd/include/drv/ps1/cd.h
new file mode 100644
index 0000000..ff57622
--- /dev/null
+++ b/src/drv/ps1/cd/include/drv/ps1/cd.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_CD_H
+#define DRV_PS1_CD_H
+
+#include <drv/event.h>
+
+struct drv_ps1_cd *drv_ps1_cd_init(const struct drv_event *ev);
+int drv_ps1_cd_update(struct drv_ps1_cd *cd);
+void drv_ps1_cd_free(struct drv_ps1_cd *cd);
+
+#endif
diff --git a/src/drv/ps1/cd/private_include/drv/ps1/cd/regs.h b/src/drv/ps1/cd/private_include/drv/ps1/cd/regs.h
new file mode 100644
index 0000000..37b2d03
--- /dev/null
+++ b/src/drv/ps1/cd/private_include/drv/ps1/cd/regs.h
@@ -0,0 +1,66 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_CD_REGS_H
+#define DRV_PS1_CD_REGS_H
+
+#include <stdint.h>
+
+struct cd_reg_status
+{
+    uint8_t index :2;
+    const uint8_t ADPBUSY :1, PRMEMPT :1, PRMWRDY :1, RSLRRDY :1, DRQSTS :1,
+        BUSYSTS :1;
+};
+
+struct cd_reg_cmd
+{
+    uint8_t cmd;
+};
+
+struct cd_reg_rsp
+{
+    uint8_t rsp;
+};
+
+struct cd_reg_param
+{
+    uint8_t param;
+};
+
+union cd_reg_if
+{
+    const struct
+    {
+        uint8_t response :3, :1, cmd_start :1, :3;
+    } r;
+
+    struct
+    {
+        uint8_t ack: 5, :1, CLRPRM :1, :1;
+    } w;
+};
+
+#define CD_REG(x) (0x1f801800 + (x))
+#define CD_REG_STATUS ((volatile struct cd_reg_status *)CD_REG(0))
+#define CD_REG_CMD ((volatile struct cd_reg_cmd *)CD_REG(1))
+#define CD_REG_RSP ((const volatile struct cd_reg_rsp *)CD_REG(1))
+#define CD_REG_PARAM ((volatile struct cd_reg_param *)CD_REG(2))
+#define CD_REG_IF ((volatile union cd_reg_if *)CD_REG(3))
+
+#endif
diff --git a/src/drv/ps1/cd/private_include/drv/ps1/cd/routines.h b/src/drv/ps1/cd/private_include/drv/ps1/cd/routines.h
new file mode 100644
index 0000000..0b756de
--- /dev/null
+++ b/src/drv/ps1/cd/private_include/drv/ps1/cd/routines.h
@@ -0,0 +1,37 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_CD_ROUTINES_H
+#define DRV_PS1_CD_ROUTINES_H
+
+#include <drv/event.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/ps1/bios.h>
+#include <sys/types.h>
+#include <stddef.h>
+
+int drv_ps1_cd_send(const struct cmd *cmd);
+int drv_ps1_cd_getstat(void);
+int drv_ps1_cd_read(void *buf, size_t n, off_t offset,
+    const struct drv_event_done *done, void *args);
+int drv_ps1_cd_write(const void *buf, size_t n,
+    const struct drv_event_done *done, void *args);
+int drv_ps1_cd_next(void);
+struct CdAsyncSeekL drv_ps1_cd_toseekl(unsigned i);
+
+#endif
diff --git a/src/drv/ps1/cd/private_include/drv/ps1/cd/types.h b/src/drv/ps1/cd/private_include/drv/ps1/cd/types.h
new file mode 100644
index 0000000..2d4ae51
--- /dev/null
+++ b/src/drv/ps1/cd/private_include/drv/ps1/cd/types.h
@@ -0,0 +1,111 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_CD_TYPES_H
+#define DRV_PS1_CD_TYPES_H
+
+#include <drv/event.h>
+#include <sys/types.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct drv_ps1_cd
+{
+    bool available;
+    struct drv_event ev;
+};
+
+struct cmd
+{
+    enum
+    {
+        CMD_SYNC,
+        CMD_GETSTAT,
+        CMD_SETLOC,
+    } cmd;
+
+    union cmd_param
+    {
+        struct cmd_setloc
+        {
+            uint8_t min, sec, sect;
+        } setloc;
+    } params;
+};
+
+struct cd_prv_getstat
+{
+    union
+    {
+        struct
+        {
+            uint8_t invalid :1, motor :1, seek_error :1, id_error :1,
+                shell_open :1, reading :1, seeking :1, playing_cdda :1;
+        } bits;
+
+        uint8_t byte;
+    } status;
+};
+
+struct cd_prv_read
+{
+    int endevent, errevent;
+};
+
+struct cd_req_read
+{
+    void *buf;
+    size_t n;
+    off_t offset;
+};
+
+struct cd_req
+{
+    union
+    {
+        struct cd_req_read read;
+    } u;
+
+    int (*f)(void);
+    struct drv_event_done done;
+    struct cd_req *next;
+};
+
+enum {CD_SECTOR_SZ = 2048};
+
+struct cd_prv
+{
+    bool available, sector_read;
+    int (*next)(void);
+    int event;
+    struct cmd cmd;
+    struct cd_req *head, *tail;
+    char sector[CD_SECTOR_SZ];
+    off_t offset;
+
+    union
+    {
+        struct cd_prv_getstat getstat;
+        struct cd_prv_read read;
+    } u;
+};
+
+extern struct cd_prv drv_ps1_cd_prv;
+
+#endif
diff --git a/src/drv/ps1/cd/private_include/drv/ps1/cd/virt/types.h b/src/drv/ps1/cd/private_include/drv/ps1/cd/virt/types.h
new file mode 100644
index 0000000..59437c0
--- /dev/null
+++ b/src/drv/ps1/cd/private_include/drv/ps1/cd/virt/types.h
@@ -0,0 +1,36 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_CD_VIRT_TYPES_H
+#define DRV_PS1_CD_VIRT_TYPES_H
+
+#include <drv/event.h>
+
+struct drv_ps1_cd
+{
+    struct drv_event ev;
+};
+
+struct cd_prv
+{
+    int (*next)(void);
+};
+
+extern struct cd_prv drv_ps1_cd_prv;
+
+#endif
diff --git a/src/drv/ps1/cd/src/CMakeLists.txt b/src/drv/ps1/cd/src/CMakeLists.txt
new file mode 100644
index 0000000..df5ecca
--- /dev/null
+++ b/src/drv/ps1/cd/src/CMakeLists.txt
@@ -0,0 +1,33 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+if(WNIX_VIRT_CD)
+    add_subdirectory(virt)
+else()
+    target_sources(drv_ps1_cd PRIVATE
+        free.c
+        getstat.c
+        init.c
+        next.c
+        prv.c
+        read.c
+        toseekl.c
+        update.c
+        write.c
+    )
+endif()
+
+target_link_libraries(drv_ps1_cd PRIVATE kprintf)
diff --git a/src/drv/ps1/cd/src/ensure_event.c b/src/drv/ps1/cd/src/ensure_event.c
new file mode 100644
index 0000000..592184a
--- /dev/null
+++ b/src/drv/ps1/cd/src/ensure_event.c
@@ -0,0 +1,37 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/bios.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/ps1/event.h>
+#include <stddef.h>
+
+int drv_ps1_cd_ensure_event(struct cd_prv *const p)
+{
+    if (p->event)
+        return 0;
+
+    const int event = drv_ps1_event_open(CLASS_CDROM, SPEC_COMMAND_COMPLETE,
+        MODE_READY, NULL);
+
+    if (event == -1)
+        return -1;
+
+    drv_ps1_event_enable(p->event = event);
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/free.c b/src/drv/ps1/cd/src/free.c
new file mode 100644
index 0000000..ed6f347
--- /dev/null
+++ b/src/drv/ps1/cd/src/free.c
@@ -0,0 +1,23 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+
+void drv_ps1_cd_free(struct drv_ps1_cd *const cd)
+{
+}
diff --git a/src/drv/ps1/cd/src/getstat.c b/src/drv/ps1/cd/src/getstat.c
new file mode 100644
index 0000000..34bdaf5
--- /dev/null
+++ b/src/drv/ps1/cd/src/getstat.c
@@ -0,0 +1,70 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/bios.h>
+#include <drv/ps1/event.h>
+#include <kprintf.h>
+
+static int wait_event(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_prv_getstat *const g = &p->u.getstat;
+
+    if (drv_ps1_event_test(p->event))
+    {
+        p->available = !g->status.bits.shell_open;
+
+        if (!p->head)
+            return drv_ps1_cd_getstat();
+
+        return p->head->f();
+    }
+
+    return 0;
+}
+
+static int ensure_event(struct cd_prv *const p)
+{
+    if (p->event)
+        return 0;
+    else if ((p->event = drv_ps1_event_open(CLASS_CDROM, SPEC_COMMAND_COMPLETE,
+        MODE_READY, NULL)) == -1)
+        return -1;
+
+    drv_ps1_event_enable(p->event);
+    return 0;
+}
+
+int drv_ps1_cd_getstat(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_prv_getstat *const g = &p->u.getstat;
+
+    /* TODO: CdAsyncGetStatus is *very* slow (~2.5 seconds / 10k calls) */
+    if (ensure_event(p))
+        return -1;
+    else if (!CdAsyncGetStatus(&g->status.byte))
+    {
+        kprintf("%s: CdAsyncGetStatus failed\n", __func__);
+        return -1;
+    }
+
+    p->next = wait_event;
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/init.c b/src/drv/ps1/cd/src/init.c
new file mode 100644
index 0000000..b452e82
--- /dev/null
+++ b/src/drv/ps1/cd/src/init.c
@@ -0,0 +1,42 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/event.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+struct drv_ps1_cd *drv_ps1_cd_init(const struct drv_event *const ev)
+{
+    struct drv_ps1_cd *const ret = malloc(sizeof *ret);
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (!ret)
+        return NULL;
+    else if (!p->next && drv_ps1_cd_getstat())
+        goto failure;
+
+    *ret = (const struct drv_ps1_cd){.ev = *ev};
+    return ret;
+
+failure:
+    free(ret);
+    return NULL;
+}
diff --git a/src/drv/ps1/cd/src/next.c b/src/drv/ps1/cd/src/next.c
new file mode 100644
index 0000000..b26633a
--- /dev/null
+++ b/src/drv/ps1/cd/src/next.c
@@ -0,0 +1,37 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/cd/types.h>
+#include <stdlib.h>
+
+int drv_ps1_cd_next(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_req *const next = p->head->next;
+
+    free(p->head);
+
+    if (next && next->f())
+        return -1;
+    else if (!(p->head = next))
+        return drv_ps1_cd_getstat();
+
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/prv.c b/src/drv/ps1/cd/src/prv.c
new file mode 100644
index 0000000..61ed4b4
--- /dev/null
+++ b/src/drv/ps1/cd/src/prv.c
@@ -0,0 +1,22 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/types.h>
+
+struct cd_prv drv_ps1_cd_prv;
diff --git a/src/drv/ps1/cd/src/read.c b/src/drv/ps1/cd/src/read.c
new file mode 100644
index 0000000..d21cbae
--- /dev/null
+++ b/src/drv/ps1/cd/src/read.c
@@ -0,0 +1,239 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/ps1/event.h>
+#include <drv/event.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int seek(void);
+
+static int deliver_event(struct cd_prv *const p, const int error)
+{
+    const struct cd_prv_read *const read = &p->u.read;
+    const struct cd_req *const req = p->head;
+    const struct drv_event_done *const d = &req->done;
+
+    drv_ps1_event_disable(read->endevent);
+    drv_ps1_event_close(read->endevent);
+    drv_ps1_event_disable(read->errevent);
+    drv_ps1_event_close(read->errevent);
+
+    if (!error)
+    {
+        const struct cd_req_read *const rr = &req->u.read;
+        const long offset = rr->offset % CD_SECTOR_SZ;
+
+        memcpy(rr->buf, p->sector + offset, rr->n);
+
+        if (!((p->offset += rr->n) % CD_SECTOR_SZ))
+            p->sector_read = false;
+    }
+
+    if (d->f(error, d->args) || drv_ps1_cd_next())
+        return -1;
+
+    return 0;
+}
+
+static int wait_read(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    const struct cd_prv_read *const read = &p->u.read;
+
+    if (drv_ps1_event_test(p->event))
+    {
+        p->sector_read = true;
+        return deliver_event(p, SUCCESS);
+    }
+    else if (drv_ps1_event_test(read->errevent)
+        || drv_ps1_event_test(read->endevent))
+        return deliver_event(p, EIO);
+
+    return 0;
+}
+
+static int uncached_read(struct cd_prv *const p)
+{
+    int endevent, errevent;
+    struct cd_prv_read *const r = &p->u.read;
+    const struct CdAsyncReadSector_mode mode =
+    {
+        .mode.bits.speed = 1,
+    };
+
+    endevent = drv_ps1_event_open(CLASS_CDROM, SPEC_DATA_END, MODE_READY, NULL);
+    errevent = drv_ps1_event_open(CLASS_CDROM, SPEC_ERROR, MODE_READY, NULL);
+
+    if (endevent == -1 || errevent == -1)
+        goto failure;
+
+    *r = (const struct cd_prv_read)
+    {
+        .endevent = endevent,
+        .errevent = errevent
+    };
+
+    drv_ps1_event_enable(endevent);
+    drv_ps1_event_enable(errevent);
+
+    if (!CdAsyncReadSector(1, p->sector, mode))
+        goto failure;
+
+    p->next = wait_read;
+    return 0;
+
+failure:
+
+    if (endevent != -1)
+    {
+        drv_ps1_event_disable(endevent);
+        drv_ps1_event_close(endevent);
+    }
+
+    if (errevent != -1)
+    {
+        drv_ps1_event_disable(errevent);
+        drv_ps1_event_close(errevent);
+    }
+
+    return -1;
+}
+
+static int cached_read(struct cd_prv *const p)
+{
+    struct cd_req *const req = p->head;
+    struct cd_req_read *const rr = &req->u.read;
+    const struct drv_event_done *const done = &req->done;
+    const off_t offset = rr->offset % CD_SECTOR_SZ,
+        rem = CD_SECTOR_SZ - offset,
+        n = rr->n > rem ? rem : rr->n;
+
+    memcpy(rr->buf, p->sector + offset, n);
+
+    if (!((p->offset += n) % CD_SECTOR_SZ))
+        p->sector_read = false;
+
+    if (done->f(SUCCESS, done->args) || drv_ps1_cd_next())
+        return -1;
+
+    return 0;
+}
+
+static int wait_seek(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    const struct cd_req *const req = p->head;
+    const struct cd_req_read *const rr = &req->u.read;
+    const struct cd_prv_read *const r = &p->u.read;
+
+    if (drv_ps1_event_test(p->event))
+    {
+        drv_ps1_event_disable(r->errevent);
+        drv_ps1_event_close(r->errevent);
+        p->offset = rr->offset;
+        return uncached_read(p);
+    }
+    else if (drv_ps1_event_test(r->errevent))
+        return deliver_event(p, EIO);
+
+    return 0;
+}
+
+static int seek(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_prv_read *const r = &p->u.read;
+    const struct cd_req_read *rr = &p->head->u.read;
+    const unsigned sector = rr->offset / CD_SECTOR_SZ;
+    const struct CdAsyncSeekL seekl = drv_ps1_cd_toseekl(sector);
+    const int errevent = drv_ps1_event_open(CLASS_CDROM, SPEC_ERROR,
+        MODE_READY, NULL);
+
+    if (errevent == -1)
+        goto failure;
+
+    *r = (const struct cd_prv_read){.errevent = errevent};
+    p->sector_read = false;
+    drv_ps1_event_enable(errevent);
+
+    if (!CdAsyncSeekL(&seekl))
+        goto failure;
+
+    p->next = wait_seek;
+    return 0;
+
+failure:
+
+    if (errevent != -1)
+    {
+        drv_ps1_event_disable(errevent);
+        drv_ps1_event_close(errevent);
+    }
+
+    return -1;
+}
+
+static int start(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    const struct cd_req *const req = p->head;
+    const struct cd_req_read *const rr = &req->u.read;
+    const off_t cursect = p->offset / CD_SECTOR_SZ,
+        tgtsect = rr->offset / CD_SECTOR_SZ;
+
+    if (cursect != tgtsect || !p->sector_read)
+        return seek();
+
+    /* TODO: multi-sector reads, make sure cache can really be used */
+    return cached_read(p);
+}
+
+int drv_ps1_cd_read(void *const buf, const size_t n, const off_t offset,
+    const struct drv_event_done *const done, void *const args)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_req *const r = malloc(sizeof *r);
+
+    if (!r)
+        return -1;
+
+    *r = (const struct cd_req)
+    {
+        .f = start,
+        .done = *done,
+        .u.read =
+        {
+            .offset = offset,
+            .buf = buf,
+            .n = n
+        }
+    };
+
+    if (!p->head)
+        p->head = r;
+    else
+        p->tail->next = r;
+
+    p->tail = r;
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/readdebug b/src/drv/ps1/cd/src/readdebug
new file mode 100644
index 0000000..b2c09a7
--- /dev/null
+++ b/src/drv/ps1/cd/src/readdebug
@@ -0,0 +1,253 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/ps1/event.h>
+#include <drv/event.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#include <drv/ps1/bios.h>
+
+static int seek(void);
+
+static int deliver_event(struct cd_prv *const p, const int error)
+{
+    const struct cd_prv_read *const read = &p->u.read;
+    const struct cd_req *const req = p->head;
+    const struct drv_event_done *const d = &req->done;
+
+    drv_ps1_event_disable(read->endevent);
+    drv_ps1_event_close(read->endevent);
+    drv_ps1_event_disable(read->errevent);
+    drv_ps1_event_close(read->errevent);
+
+    if (!error)
+    {
+        const struct cd_req_read *const rr = &req->u.read;
+        const long offset = rr->offset % CD_SECTOR_SZ;
+
+        memcpy(rr->buf, p->sector + offset, rr->n);
+
+        if (!((p->offset += rr->n) % CD_SECTOR_SZ))
+            p->sector_read = false;
+    }
+
+    if (d->f(error, d->args) || drv_ps1_cd_next())
+        return -1;
+
+    return 0;
+}
+
+static int wait_read(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    const struct cd_prv_read *const read = &p->u.read;
+
+    if (drv_ps1_event_test(p->event))
+    {
+        p->sector_read = true;
+        return deliver_event(p, SUCCESS);
+    }
+    else if (drv_ps1_event_test(read->errevent)
+        || drv_ps1_event_test(read->endevent))
+        return deliver_event(p, EIO);
+
+    return 0;
+}
+
+static int uncached_read(struct cd_prv *const p)
+{
+    int endevent, errevent;
+    struct cd_prv_read *const r = &p->u.read;
+    const struct CdAsyncReadSector_mode mode =
+    {
+        .mode.bits.speed = 1,
+    };
+
+    endevent = drv_ps1_event_open(CLASS_CDROM, SPEC_DATA_END, MODE_READY, NULL);
+    errevent = drv_ps1_event_open(CLASS_CDROM, SPEC_ERROR, MODE_READY, NULL);
+
+    if (endevent == -1 || errevent == -1)
+        goto failure;
+
+    *r = (const struct cd_prv_read)
+    {
+        .endevent = endevent,
+        .errevent = errevent
+    };
+
+    drv_ps1_event_enable(endevent);
+    drv_ps1_event_enable(errevent);
+
+    Printf("preparing async read\n");
+    if (!CdAsyncReadSector(1, p->sector, mode))
+        goto failure;
+
+    p->next = wait_read;
+    return 0;
+
+failure:
+
+    if (endevent != -1)
+    {
+        drv_ps1_event_disable(endevent);
+        drv_ps1_event_close(endevent);
+    }
+
+    if (errevent != -1)
+    {
+        drv_ps1_event_disable(errevent);
+        drv_ps1_event_close(errevent);
+    }
+
+    return -1;
+}
+
+static int cached_read(struct cd_prv *const p)
+{
+    struct cd_req *const req = p->head;
+    struct cd_req_read *const rr = &req->u.read;
+    const struct drv_event_done *const done = &req->done;
+    const off_t offset = rr->offset % CD_SECTOR_SZ,
+        rem = CD_SECTOR_SZ - offset,
+        n = rr->n > rem ? rem : rr->n;
+
+    Printf("Doing %lu-byte cached read from offset %lu to %p\n",
+            (unsigned long) n, (unsigned long) offset, (void *)rr->buf);
+    memcpy(rr->buf, p->sector + offset, n);
+
+    if (!((p->offset += n) % CD_SECTOR_SZ))
+        p->sector_read = false;
+
+    if (done->f(SUCCESS, done->args) || drv_ps1_cd_next())
+        return -1;
+
+    return 0;
+}
+
+static int wait_seek(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    const struct cd_req *const req = p->head;
+    const struct cd_req_read *const rr = &req->u.read;
+    const struct cd_prv_read *const r = &p->u.read;
+
+    if (drv_ps1_event_test(p->event))
+    {
+        Printf("finished seeking\n");
+        drv_ps1_event_disable(r->errevent);
+        drv_ps1_event_close(r->errevent);
+        p->offset = rr->offset;
+        return uncached_read(p);
+    }
+    else if (drv_ps1_event_test(r->errevent))
+    {
+        Printf("failed to seek\n");
+        return deliver_event(p, EIO);
+    }
+
+    return 0;
+}
+
+static int seek(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_prv_read *const r = &p->u.read;
+    const struct cd_req_read *rr = &p->head->u.read;
+    const unsigned sector = rr->offset / CD_SECTOR_SZ;
+    const struct CdAsyncSeekL seekl = drv_ps1_cd_toseekl(sector);
+    const int errevent = drv_ps1_event_open(CLASS_CDROM, SPEC_ERROR,
+        MODE_READY, NULL);
+
+    if (errevent == -1)
+        goto failure;
+
+    *r = (const struct cd_prv_read){.errevent = errevent};
+    p->sector_read = false;
+    drv_ps1_event_enable(errevent);
+
+    Printf("Seeking to offset %lu\n", (unsigned long)rr->offset);
+
+    if (!CdAsyncSeekL(&seekl))
+        goto failure;
+
+    p->next = wait_seek;
+    return 0;
+
+failure:
+
+    if (errevent != -1)
+    {
+        drv_ps1_event_disable(errevent);
+        drv_ps1_event_close(errevent);
+    }
+
+    return -1;
+}
+
+static int start(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    const struct cd_req *const req = p->head;
+    const struct cd_req_read *const rr = &req->u.read;
+    const off_t cursect = p->offset / CD_SECTOR_SZ,
+        tgtsect = rr->offset / CD_SECTOR_SZ;
+
+    if (cursect != tgtsect || !p->sector_read)
+        return seek();
+
+    /* TODO: multi-sector reads, make sure cache can really be used */
+    return cached_read(p);
+}
+
+int drv_ps1_cd_read(void *const buf, const size_t n, const off_t offset,
+    const struct drv_event_done *const done, void *const args)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+    struct cd_req *const r = malloc(sizeof *r);
+
+    if (!r)
+        return -1;
+
+    *r = (const struct cd_req)
+    {
+        .f = start,
+        .done = *done,
+        .u.read =
+        {
+            .offset = offset,
+            .buf = buf,
+            .n = n
+        }
+    };
+
+    if (!p->head)
+        p->head = r;
+    else
+        p->tail->next = r;
+
+    p->tail = r;
+    Printf("Added %p {.buf=%p, .n=%lu} to read reqs\n", (void *)p->tail, buf,
+        (unsigned long)n);
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/send.c b/src/drv/ps1/cd/src/send.c
new file mode 100644
index 0000000..01aa5cb
--- /dev/null
+++ b/src/drv/ps1/cd/src/send.c
@@ -0,0 +1,101 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/bios.h>
+#include <drv/ps1/cd/regs.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/ps1/event.h>
+#include <stdint.h>
+
+static int wait_event(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (drv_ps1_event_test(p->event))
+    {
+        const union cd_prv_getstat g = {.status = CD_REG_RSP->rsp};
+
+        p->available = !g.bits.shell_open;
+    }
+
+    return 0;
+}
+
+static void send_params(const struct cd_prv *const p)
+{
+    static const size_t n[] =
+    {
+        [CMD_SETLOC] = sizeof (struct cmd_setloc)
+    };
+
+    const uint8_t cmd = p->cmd.cmd, index = CD_REG_STATUS->index;
+
+    if (cmd < sizeof n / sizeof *n)
+    {
+        const void *const vbuf = &p->cmd.params;
+        const uint8_t *buf = vbuf;
+
+        CD_REG_STATUS->index = 0;
+
+        for (size_t i = 0; i < n[cmd]; i++)
+            CD_REG_PARAM->param = *buf++;
+
+        CD_REG_STATUS->index = index;
+    }
+}
+
+static int send_data(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (CD_REG_STATUS->BUSYSTS)
+        return 0;
+
+    send_params(p);
+    CD_REG_CMD->cmd = p->cmd.cmd;
+    p->next = wait_event;
+    return 0;
+}
+
+static int reset_param_fifo(void)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (CD_REG_STATUS->BUSYSTS)
+        return 0;
+
+    CD_REG_IF->w.ack = 0x1f;
+    CD_REG_STATUS->index = 1;
+    CD_REG_IF->w.CLRPRM = 1;
+    p->next = send_data;
+    return 0;
+}
+
+int drv_ps1_cd_send(const struct cmd *const cmd)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (drv_ps1_cd_ensure_event(p))
+        return -1;
+
+    p->cmd = *cmd;
+    p->next = reset_param_fifo;
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/toseekl.c b/src/drv/ps1/cd/src/toseekl.c
new file mode 100644
index 0000000..ee776c9
--- /dev/null
+++ b/src/drv/ps1/cd/src/toseekl.c
@@ -0,0 +1,54 @@
+/* Original functions from psn00bsdk, commit 5d9aa2d3
+ *
+ * itob extracted from libpsn00b/include/psxcd.h
+ * CdIntToPos (here renamed to drv_ps1_cd_toseekl) extracted from
+ * libpsn00b/psxcd/misc.c
+ *
+ * Original copyright notice:
+ *
+ * PSn00bSDK CD-ROM library
+ * (C) 2020-2023 Lameguy64, spicyjpeg - MPL licensed
+ */
+
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/bios.h>
+
+/**
+ * @brief Translates a decimal value to BCD.
+ *
+ * @details Translates a decimal integer in 0-99 range into a BCD format value.
+ */
+static unsigned itob(const unsigned i)
+{
+    return ((i / 10) * 16) | (i % 10);
+}
+
+struct CdAsyncSeekL drv_ps1_cd_toseekl(unsigned i)
+{
+	i += 150;
+
+    return (const struct CdAsyncSeekL)
+    {
+        .minutes = itob(i / (75 * 60)),
+        .seconds = itob((i / 75) % 60),
+        .frames = itob(i % 75)
+    };
+}
diff --git a/src/drv/ps1/cd/src/update.c b/src/drv/ps1/cd/src/update.c
new file mode 100644
index 0000000..148dd87
--- /dev/null
+++ b/src/drv/ps1/cd/src/update.c
@@ -0,0 +1,47 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/event.h>
+#include <stdbool.h>
+
+int drv_ps1_cd_update(struct drv_ps1_cd *const cd)
+{
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (p->next())
+        return -1;
+    else if (p->available ^ cd->available)
+    {
+        const struct drv_event *const ev = &cd->ev;
+        static const struct drv_event_ops ops =
+        {
+            .read = drv_ps1_cd_read,
+            .write = drv_ps1_cd_write
+        };
+
+        if (ev->status("cd0", &ops, p->available, 0440, ev->args))
+            return -1;
+
+        cd->available = p->available;
+    }
+
+    return 0;
+}
diff --git a/src/drv/ps1/cd/src/virt/CMakeLists.txt b/src/drv/ps1/cd/src/virt/CMakeLists.txt
new file mode 100644
index 0000000..0e5bd1b
--- /dev/null
+++ b/src/drv/ps1/cd/src/virt/CMakeLists.txt
@@ -0,0 +1,25 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_cd PRIVATE
+    # free.c
+    init.c
+    # next.c
+    # prv.c
+    # read.c
+    # update.c
+    # write.c
+)
diff --git a/src/drv/ps1/cd/src/virt/init.c b/src/drv/ps1/cd/src/virt/init.c
new file mode 100644
index 0000000..204f7fa
--- /dev/null
+++ b/src/drv/ps1/cd/src/virt/init.c
@@ -0,0 +1,41 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/virt/types.h>
+#include <drv/event.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+struct drv_ps1_cd *drv_ps1_cd_init(const struct drv_event *const ev)
+{
+    struct drv_ps1_cd *const ret = malloc(sizeof *ret);
+    struct cd_prv *const p = &drv_ps1_cd_prv;
+
+    if (!ret)
+        return NULL;
+    else if (!p->next && drv_ps1_cd_getstat())
+        goto failure;
+
+    *ret = (const struct drv_ps1_cd){.ev = *ev};
+    return ret;
+
+failure:
+    free(ret);
+    return NULL;
+}
diff --git a/src/drv/ps1/cd/src/write.c b/src/drv/ps1/cd/src/write.c
new file mode 100644
index 0000000..ba47993
--- /dev/null
+++ b/src/drv/ps1/cd/src/write.c
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/cd/routines.h>
+#include <drv/ps1/cd/types.h>
+#include <drv/event.h>
+#include <errno.h>
+
+int drv_ps1_cd_write(const void *const buf, const size_t n,
+    const struct drv_event_done *const done, void *const args)
+{
+    /* TODO: write event callback returning EROFS */
+    errno = EROFS;
+    return -1;
+}
diff --git a/src/drv/ps1/cpu/CMakeLists.txt b/src/drv/ps1/cpu/CMakeLists.txt
new file mode 100644
index 0000000..dafb0cd
--- /dev/null
+++ b/src/drv/ps1/cpu/CMakeLists.txt
@@ -0,0 +1,18 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_cpu INTERFACE)
+target_include_directories(drv_ps1_cpu INTERFACE include)
diff --git a/src/drv/ps1/cpu/include/drv/ps1/cpu.h b/src/drv/ps1/cpu/include/drv/ps1/cpu.h
new file mode 100644
index 0000000..d951f48
--- /dev/null
+++ b/src/drv/ps1/cpu/include/drv/ps1/cpu.h
@@ -0,0 +1,24 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_CPU_H
+#define DRV_PS1_CPU_H
+
+#define DRV_PS1_CPU_F 33868800ul
+
+#endif
diff --git a/src/drv/ps1/dma/CMakeLists.txt b/src/drv/ps1/dma/CMakeLists.txt
new file mode 100644
index 0000000..0daeee9
--- /dev/null
+++ b/src/drv/ps1/dma/CMakeLists.txt
@@ -0,0 +1,18 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_dma INTERFACE)
+target_include_directories(drv_ps1_dma INTERFACE include)
diff --git a/src/drv/ps1/dma/include/drv/ps1/dma.h b/src/drv/ps1/dma/include/drv/ps1/dma.h
new file mode 100644
index 0000000..9538c3b
--- /dev/null
+++ b/src/drv/ps1/dma/include/drv/ps1/dma.h
@@ -0,0 +1,97 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_DMA_H
+#define DRV_PS1_DMA_H
+
+#include <stdint.h>
+
+union dpcr
+{
+    struct
+    {
+        uint32_t mdecin_prio :3, mdecin_en :1, mdecout_prio :3, mdecout_en :1,
+            gpu_prio :3, gpu_en :1, cdrom_prio :3, cdrom_en :1, spu_prio :3,
+            spu_en :1, pio_prio :3, pio_en :1, otc_prio :3, otc_en :1, :4;
+    } bits;
+
+    uint32_t mask;
+};
+
+union madr
+{
+    struct
+    {
+        uint32_t addr :24, :8;
+    } bits;
+
+    uint32_t mask;
+};
+
+union bcr
+{
+    struct
+    {
+        uint16_t nwords, reserved;
+    } syncmode_0;
+
+    struct
+    {
+        uint16_t blocksz, nblocks;
+    } syncmode_1;
+
+    struct
+    {
+        uint32_t reserved;
+    } syncmode_2;
+
+    uint32_t mask;
+};
+
+enum
+{
+    CHCR_DIR_TO_RAM,
+    CHCR_DIR_FROM_RAM
+};
+
+enum
+{
+    CHCR_SYNC_MODE_ALL,
+    CHCR_SYNC_MODE_BLOCKS,
+    CHCR_SYNC_MODE_LINKED_LIST
+};
+
+union chcr
+{
+    struct
+    {
+        uint32_t dir :1, memstep :1, :6, chopping :1, sync_mode :2, :5,
+            chopping_dma_window_sz :3, :1, chopping_cpu_window_sz :3, :1,
+            start_busy :1, :3, start_trigger :1, :3;
+    } bits;
+
+    uint32_t mask;
+};
+
+#define DMA_BASE(dma, off) ((dma) * 0x10 + 0x1f801080 + (off))
+#define D2_MADR ((volatile union madr *)DMA_BASE(2, 0))
+#define D2_BCR ((volatile union bcr *)DMA_BASE(2, 4))
+#define D2_CHCR ((volatile union chcr *)DMA_BASE(2, 8))
+#define DPCR ((volatile union dpcr *)0x1f8010f0)
+
+#endif
diff --git a/src/drv/ps1/event/CMakeLists.txt b/src/drv/ps1/event/CMakeLists.txt
new file mode 100644
index 0000000..2b00aaa
--- /dev/null
+++ b/src/drv/ps1/event/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_event)
+add_subdirectory(src)
+target_include_directories(drv_ps1_event PUBLIC include)
+target_link_libraries(drv_ps1_event PUBLIC c drv_ps1_bios)
diff --git a/src/drv/ps1/event/include/drv/ps1/event.h b/src/drv/ps1/event/include/drv/ps1/event.h
new file mode 100644
index 0000000..2c34b02
--- /dev/null
+++ b/src/drv/ps1/event/include/drv/ps1/event.h
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_EVENT_H
+#define DRV_PS1_EVENT_H
+
+#include <drv/ps1/bios.h>
+
+int drv_ps1_event_open(int class, int spec, int mode, int (*f)(void));
+int drv_ps1_event_test(int event);
+int drv_ps1_event_wait(int event);
+int drv_ps1_event_enable(int event);
+int drv_ps1_event_disable(int event);
+int drv_ps1_event_close(int event);
+
+#endif
diff --git a/src/drv/ps1/event/src/CMakeLists.txt b/src/drv/ps1/event/src/CMakeLists.txt
new file mode 100644
index 0000000..e741edc
--- /dev/null
+++ b/src/drv/ps1/event/src/CMakeLists.txt
@@ -0,0 +1,23 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_event PRIVATE
+    close.c
+    disable.c
+    enable.c
+    open.c
+    test.c
+)
diff --git a/src/drv/ps1/event/src/close.c b/src/drv/ps1/event/src/close.c
new file mode 100644
index 0000000..01c9a33
--- /dev/null
+++ b/src/drv/ps1/event/src/close.c
@@ -0,0 +1,25 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/event.h>
+#include <drv/ps1/bios.h>
+
+int drv_ps1_event_close(const int event)
+{
+    return CloseEvent(event);
+}
diff --git a/src/drv/ps1/event/src/disable.c b/src/drv/ps1/event/src/disable.c
new file mode 100644
index 0000000..6d32b2b
--- /dev/null
+++ b/src/drv/ps1/event/src/disable.c
@@ -0,0 +1,25 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/event.h>
+#include <drv/ps1/bios.h>
+
+int drv_ps1_event_disable(const int event)
+{
+    return DisableEvent(event);
+}
diff --git a/src/drv/ps1/event/src/enable.c b/src/drv/ps1/event/src/enable.c
new file mode 100644
index 0000000..3368ac4
--- /dev/null
+++ b/src/drv/ps1/event/src/enable.c
@@ -0,0 +1,25 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/event.h>
+#include <drv/ps1/bios.h>
+
+int drv_ps1_event_enable(const int event)
+{
+    return EnableEvent(event);
+}
diff --git a/src/drv/ps1/event/src/open.c b/src/drv/ps1/event/src/open.c
new file mode 100644
index 0000000..6bb55f1
--- /dev/null
+++ b/src/drv/ps1/event/src/open.c
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/event.h>
+#include <drv/ps1/bios.h>
+
+int drv_ps1_event_open(const int class, const int spec, const int mode,
+    int (*const f)(void))
+{
+    int ret;
+
+    EnterCriticalSection();
+    ret = OpenEvent(class, spec, mode, f);
+    ExitCriticalSection();
+    return ret;
+}
diff --git a/src/drv/ps1/event/src/test.c b/src/drv/ps1/event/src/test.c
new file mode 100644
index 0000000..358bd8e
--- /dev/null
+++ b/src/drv/ps1/event/src/test.c
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/event.h>
+#include <drv/ps1/bios.h>
+
+int drv_ps1_event_test(const int event)
+{
+    int ret;
+
+    ret = TestEvent(event);
+    return ret;
+}
diff --git a/src/drv/ps1/gpu/CMakeLists.txt b/src/drv/ps1/gpu/CMakeLists.txt
new file mode 100644
index 0000000..a86ab92
--- /dev/null
+++ b/src/drv/ps1/gpu/CMakeLists.txt
@@ -0,0 +1,18 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_gpu INTERFACE)
+target_include_directories(drv_ps1_gpu INTERFACE include)
diff --git a/src/drv/ps1/gpu/include/drv/ps1/gpu.h b/src/drv/ps1/gpu/include/drv/ps1/gpu.h
new file mode 100644
index 0000000..1afc5f6
--- /dev/null
+++ b/src/drv/ps1/gpu/include/drv/ps1/gpu.h
@@ -0,0 +1,173 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_GPU_H
+#define DRV_PS1_GPU_H
+
+#include <stdint.h>
+
+enum
+{
+    GP0_FILL_VRAM = 0x02,
+    GP0_TEXTRECT_VARSZ_OPAQ_RAW = 0x65,
+    GP0_COPY_RECT_CPU_VRAM = 0xa0,
+    GP0_COPY_RECT_VRAM_CPU = 0xc0,
+    GP0_DRAW_MODE = 0xe1,
+    GP0_TEX_WINDOW,
+    GP0_DRAW_AREA_TOP_LEFT,
+    GP0_DRAW_AREA_BOTTOM_RIGHT,
+    GP0_DRAW_OFFSET,
+    GP0_DRAW_MASK_BIT
+};
+
+enum
+{
+    GP1_RESET_GPU,
+    GP1_RESET_CMDBUF,
+    GP1_ACK_IRQ,
+    GP1_DISPLAY_ENABLE,
+    GP1_DMA_DIR,
+    GP1_START_DISPLAY_AREA,
+    GP1_H_DISPLAY_RANGE,
+    GP1_V_DISPLAY_RANGE,
+    GP1_DISPLAY_MODE
+};
+
+enum
+{
+    GP1_DMA_DIR_OFF,
+    GP1_DMA_DIR_FIFO,
+    GP1_DMA_DIR_CPU_TO_GP0,
+    GP1_DMA_DIR_GPUREAD_TO_CPU
+};
+
+union drv_ps1_gpu_gp0
+{
+    uint32_t mask;
+
+    struct
+    {
+        uint32_t w :16, h :16, x :16, y :16, r :8, g :8, b :8, cmd :8;
+    } fill_vram;
+
+    struct
+    {
+        uint32_t :24, cmd :8;
+    } copy_rect;
+
+    struct
+    {
+        uint16_t x, y;
+    } coord;
+
+    struct
+    {
+        uint16_t w, h;
+    } size;
+
+    struct
+    {
+        uint32_t page_x :4, page_y :1, stp :2, bpp :2, dither :1,
+            draw_to_display :1, tex_disable :1, xflip :1, yflip :1, :10,
+            cmd :8;
+    } draw_mode;
+
+    struct
+    {
+        uint32_t mask_x :5, mask_y :5, off_x :5, off_y :5, :4, cmd :8;
+    } tex_window;
+
+    struct
+    {
+        uint32_t x :10, y :9, :5, cmd :8;
+    } draw_area_tl, draw_area_br;
+
+    struct
+    {
+        int32_t x :11, y :11, :2, cmd :8;
+    } offset;
+
+    struct
+    {
+        uint32_t set :1, check :1, :22, cmd :8;
+    } mask_bit;
+};
+
+union drv_ps1_gpu_gp1
+{
+    uint32_t mask;
+
+    struct
+    {
+        uint32_t :24, cmd:8;
+    } reset_gpu, reset_cmdbuf, ack_irq;
+
+    struct
+    {
+        uint32_t disable :1, :23, cmd :8;
+    } display;
+
+    struct
+    {
+        uint32_t dir :2, :22, cmd :8;
+    } dma;
+
+    struct
+    {
+        uint32_t x :10, y :9, :5, cmd :8;
+    } disparea;
+
+    struct
+    {
+        uint32_t x1 :12, x2 :12, cmd :8;
+    } h_display_range;
+
+    struct
+    {
+        uint32_t y1 :10, y2 :10, :4, cmd :8;
+    } v_display_range;
+
+    struct
+    {
+        uint32_t hres :2, vres :1, vmode :1, coldepth :1, vinterlace :1,
+            hres2 :1, reverse :1, :16, cmd :8;
+    } display_mode;
+};
+
+union drv_ps1_gpu_stat
+{
+    struct
+    {
+        uint32_t x_base :4, y_base :1, stp :2, bpp :2, dither :1,
+            draw_to_display :1, set_mask :1, draw_pix :1, interlace :1,
+            reverse :1, disable :1, xres2 :1, xres1 :2, yres :1, vmode :1,
+            coldepth :1, vinterlace :1, display_enable :1, irq_req :1,
+            dma_req :1, ready_cmd :1, ready_send :1, ready_dma :1, dma_dir :2,
+            draw_odd :1;
+    } bits;
+
+    uint32_t mask;
+};
+
+#define GPU_BASE 0x1f801810
+#define GPU_REG(x) (GPU_BASE + (x))
+#define GP0 ((volatile union drv_ps1_gpu_gp0 *)GPU_REG(0))
+#define GP1 ((volatile union drv_ps1_gpu_gp1 *)GPU_REG(4))
+#define GPUSTAT ((volatile const union drv_ps1_gpu_stat *)GPU_REG(4))
+
+#endif
diff --git a/src/drv/ps1/include/drv/ps1.h b/src/drv/ps1/include/drv/ps1.h
new file mode 100644
index 0000000..7d92878
--- /dev/null
+++ b/src/drv/ps1/include/drv/ps1.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_H
+#define DRV_PS1_H
+
+#include <drv/event.h>
+
+struct drv_port *drv_ps1_init(const struct drv_event *ev);
+int drv_ps1_update(struct drv_port *p);
+void drv_ps1_free(struct drv_port *p);
+
+#endif
diff --git a/src/drv/ps1/irq/CMakeLists.txt b/src/drv/ps1/irq/CMakeLists.txt
new file mode 100644
index 0000000..8327cd5
--- /dev/null
+++ b/src/drv/ps1/irq/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_irq)
+add_subdirectory(src)
+target_include_directories(drv_ps1_irq PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_irq PUBLIC c PRIVATE drv_ps1_bios)
diff --git a/src/drv/ps1/irq/include/drv/ps1/irq.h b/src/drv/ps1/irq/include/drv/ps1/irq.h
new file mode 100644
index 0000000..0d40c7f
--- /dev/null
+++ b/src/drv/ps1/irq/include/drv/ps1/irq.h
@@ -0,0 +1,64 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_IRQ_H
+#define DRV_PS1_IRQ_H
+
+#include <stdint.h>
+
+union drv_ps1_statmask
+{
+    struct
+    {
+        uint32_t vblank :1, gpu :1, cdrom :1, dma :1, tmr0 :1, tmr1 :1, tmr2 :1,
+            controller :1, sio :1, spu :1, lightpen :1, :21;
+    } bits;
+
+    uint32_t mask;
+};
+
+#define I_BASE(x) (0x1f801070 + (x))
+#define I_STAT ((volatile union drv_ps1_statmask *)I_BASE(0))
+#define I_MASK ((volatile union drv_ps1_statmask *)I_BASE(4))
+
+enum drv_ps1_irq
+{
+    IRQ_VBLANK,
+    IRQ_GPU,
+    IRQ_CDROM,
+    IRQ_DMA,
+    IRQ_TMR0,
+    IRQ_TMR1,
+    IRQ_TMR2,
+    IRQ_JOYPAD_MEMCARD,
+    IRQ_SIO,
+    IRQ_SPU,
+    IRQ_JOYPAD_IO
+};
+
+struct drv_ps1_irq_src
+{
+    int mask;
+    int (*fn)(void);
+    struct drv_ps1_irq_src *next;
+};
+
+int drv_ps1_irq_init(void);
+int drv_ps1_irq_set(struct drv_ps1_irq_src *src);
+
+#endif
diff --git a/src/drv/ps1/irq/private_include/drv/ps1/irq/routines.h b/src/drv/ps1/irq/private_include/drv/ps1/irq/routines.h
new file mode 100644
index 0000000..39b7448
--- /dev/null
+++ b/src/drv/ps1/irq/private_include/drv/ps1/irq/routines.h
@@ -0,0 +1,24 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_IRQ_ROUTINES_H
+#define DRV_PS1_IRQ_ROUTINES_H
+
+void drv_ps1_irq_handler(void);
+
+#endif
diff --git a/src/drv/ps1/irq/private_include/drv/ps1/irq/types.h b/src/drv/ps1/irq/private_include/drv/ps1/irq/types.h
new file mode 100644
index 0000000..6c5a185
--- /dev/null
+++ b/src/drv/ps1/irq/private_include/drv/ps1/irq/types.h
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_IRQ_TYPES_H
+#define DRV_PS1_IRQ_TYPES_H
+
+#include <drv/ps1/irq.h>
+
+extern struct drv_ps1_irq_src *drv_ps1_irq_head;
+
+#endif
diff --git a/src/drv/ps1/irq/src/CMakeLists.txt b/src/drv/ps1/irq/src/CMakeLists.txt
new file mode 100644
index 0000000..3823f4e
--- /dev/null
+++ b/src/drv/ps1/irq/src/CMakeLists.txt
@@ -0,0 +1,22 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_irq PRIVATE
+    handler.c
+    head.c
+    init.c
+    set.c
+)
diff --git a/src/drv/ps1/irq/src/handler.c b/src/drv/ps1/irq/src/handler.c
new file mode 100644
index 0000000..0861852
--- /dev/null
+++ b/src/drv/ps1/irq/src/handler.c
@@ -0,0 +1,32 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/irq.h>
+#include <drv/ps1/irq/routines.h>
+#include <drv/ps1/irq/types.h>
+#include <drv/ps1/bios.h>
+#include <stddef.h>
+
+void drv_ps1_irq_handler(void)
+{
+    for (struct drv_ps1_irq_src *s = drv_ps1_irq_head; s; s = s->next)
+        if (I_STAT->mask & s->mask)
+            s->fn();
+
+    ReturnFromException();
+}
diff --git a/src/drv/ps1/irq/src/head.c b/src/drv/ps1/irq/src/head.c
new file mode 100644
index 0000000..cde1fd8
--- /dev/null
+++ b/src/drv/ps1/irq/src/head.c
@@ -0,0 +1,22 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/irq.h>
+#include <drv/ps1/irq/types.h>
+
+struct drv_ps1_irq_src *drv_ps1_irq_head;
diff --git a/src/drv/ps1/irq/src/init.c b/src/drv/ps1/irq/src/init.c
new file mode 100644
index 0000000..9e92b01
--- /dev/null
+++ b/src/drv/ps1/irq/src/init.c
@@ -0,0 +1,40 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/irq.h>
+#include <drv/ps1/irq/routines.h>
+#include <drv/ps1/bios.h>
+#include <setjmp.h>
+
+int drv_ps1_irq_init(void)
+{
+    static jmp_buf jmp;
+    static char stack[128];
+    const int critical = EnterCriticalSection();
+
+    if (SaveState(jmp))
+        drv_ps1_irq_handler();
+
+    jmp->sp = (unsigned)stack + sizeof stack - 4;
+    SetCustomExitFromException(jmp);
+
+    if (critical)
+        ExitCriticalSection();
+
+    return 0;
+}
diff --git a/src/drv/ps1/irq/src/set.c b/src/drv/ps1/irq/src/set.c
new file mode 100644
index 0000000..35c5ed0
--- /dev/null
+++ b/src/drv/ps1/irq/src/set.c
@@ -0,0 +1,36 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/irq.h>
+#include <drv/ps1/irq/types.h>
+#include <drv/ps1/bios.h>
+
+int drv_ps1_irq_set(struct drv_ps1_irq_src *const src)
+{
+    if (!drv_ps1_irq_head)
+        drv_ps1_irq_head = src;
+    else
+        for (struct drv_ps1_irq_src *s = drv_ps1_irq_head; s; s = s->next)
+            if (!s->next)
+            {
+                s->next = src;
+                break;
+            }
+
+    return 0;
+}
diff --git a/src/drv/ps1/mc/CMakeLists.txt b/src/drv/ps1/mc/CMakeLists.txt
new file mode 100644
index 0000000..ef232ef
--- /dev/null
+++ b/src/drv/ps1/mc/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_mc)
+add_subdirectory(src)
+target_include_directories(drv_ps1_mc PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_mc PUBLIC c drv_event)
diff --git a/src/drv/ps1/mc/include/drv/ps1/mc.h b/src/drv/ps1/mc/include/drv/ps1/mc.h
new file mode 100644
index 0000000..2e90776
--- /dev/null
+++ b/src/drv/ps1/mc/include/drv/ps1/mc.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_MC_H
+#define DRV_PS1_MC_H
+
+#include <drv/event.h>
+
+struct drv_ps1_mc *drv_ps1_mc_init(const struct drv_event *ev);
+int drv_ps1_mc_update(struct drv_ps1_mc *mc);
+void drv_ps1_mc_free(struct drv_ps1_mc *mc);
+
+#endif
diff --git a/src/drv/ps1/mc/private_include/drv/ps1/mc/types.h b/src/drv/ps1/mc/private_include/drv/ps1/mc/types.h
new file mode 100644
index 0000000..14606e5
--- /dev/null
+++ b/src/drv/ps1/mc/private_include/drv/ps1/mc/types.h
@@ -0,0 +1,37 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_MC_TYPES_H
+#define DRV_PS1_MC_TYPES_H
+
+#include <drv/event.h>
+
+struct drv_ps1_mc
+{
+    const struct drv_event *ev;
+};
+
+enum
+{
+    MC_0,
+    MC_1,
+
+    N_MC
+};
+
+#endif
diff --git a/src/drv/ps1/mc/src/CMakeLists.txt b/src/drv/ps1/mc/src/CMakeLists.txt
new file mode 100644
index 0000000..ae1378c
--- /dev/null
+++ b/src/drv/ps1/mc/src/CMakeLists.txt
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_mc PRIVATE
+    free.c
+    init.c
+    update.c
+)
diff --git a/src/drv/ps1/mc/src/free.c b/src/drv/ps1/mc/src/free.c
new file mode 100644
index 0000000..bdf54ff
--- /dev/null
+++ b/src/drv/ps1/mc/src/free.c
@@ -0,0 +1,23 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/mc.h>
+
+void drv_ps1_mc_free(struct drv_ps1_mc *const mc)
+{
+}
diff --git a/src/drv/ps1/mc/src/init.c b/src/drv/ps1/mc/src/init.c
new file mode 100644
index 0000000..88be46a
--- /dev/null
+++ b/src/drv/ps1/mc/src/init.c
@@ -0,0 +1,34 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/mc.h>
+#include <drv/ps1/mc/types.h>
+#include <drv/event.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+struct drv_ps1_mc *drv_ps1_mc_init(const struct drv_event *const ev)
+{
+    struct drv_ps1_mc *const ret = malloc(sizeof *ret);
+
+    if (!ret)
+        return NULL;
+
+    *ret = (const struct drv_ps1_mc){.ev = ev};
+    return ret;
+}
diff --git a/src/drv/ps1/mc/src/update.c b/src/drv/ps1/mc/src/update.c
new file mode 100644
index 0000000..866bf94
--- /dev/null
+++ b/src/drv/ps1/mc/src/update.c
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/mc.h>
+#include <drv/event.h>
+
+int drv_ps1_mc_update(struct drv_ps1_mc *const mc)
+{
+    /* TODO */
+    return 0;
+}
diff --git a/src/drv/ps1/pad/CMakeLists.txt b/src/drv/ps1/pad/CMakeLists.txt
new file mode 100644
index 0000000..eb74091
--- /dev/null
+++ b/src/drv/ps1/pad/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_pad)
+add_subdirectory(src)
+target_include_directories(drv_ps1_pad PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_pad PUBLIC c drv_event)
diff --git a/src/drv/ps1/pad/include/drv/ps1/pad.h b/src/drv/ps1/pad/include/drv/ps1/pad.h
new file mode 100644
index 0000000..9cc2fc6
--- /dev/null
+++ b/src/drv/ps1/pad/include/drv/ps1/pad.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_PAD_H
+#define DRV_PS1_PAD_H
+
+#include <drv/event.h>
+
+struct drv_ps1_pad *drv_ps1_pad_init(const struct drv_event *ev);
+int drv_ps1_pad_update(struct drv_ps1_pad *pad);
+void drv_ps1_pad_free(struct drv_ps1_pad *pad);
+
+#endif
diff --git a/src/drv/ps1/pad/private_include/drv/ps1/pad/types.h b/src/drv/ps1/pad/private_include/drv/ps1/pad/types.h
new file mode 100644
index 0000000..c164a30
--- /dev/null
+++ b/src/drv/ps1/pad/private_include/drv/ps1/pad/types.h
@@ -0,0 +1,29 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_PAD_TYPES_H
+#define DRV_PS1_PAD_TYPES_H
+
+#include <drv/event.h>
+
+struct drv_ps1_pad
+{
+    const struct drv_event *ev;
+};
+
+#endif
diff --git a/src/drv/ps1/pad/src/CMakeLists.txt b/src/drv/ps1/pad/src/CMakeLists.txt
new file mode 100644
index 0000000..bfae1a1
--- /dev/null
+++ b/src/drv/ps1/pad/src/CMakeLists.txt
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_pad PRIVATE
+    free.c
+    init.c
+    update.c
+)
diff --git a/src/drv/ps1/pad/src/free.c b/src/drv/ps1/pad/src/free.c
new file mode 100644
index 0000000..1498f2d
--- /dev/null
+++ b/src/drv/ps1/pad/src/free.c
@@ -0,0 +1,23 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/pad.h>
+
+void drv_ps1_pad_free(struct drv_ps1_pad *const pad)
+{
+}
diff --git a/src/drv/ps1/pad/src/init.c b/src/drv/ps1/pad/src/init.c
new file mode 100644
index 0000000..8fe3ccb
--- /dev/null
+++ b/src/drv/ps1/pad/src/init.c
@@ -0,0 +1,34 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/pad.h>
+#include <drv/ps1/pad/types.h>
+#include <drv/event.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+struct drv_ps1_pad *drv_ps1_pad_init(const struct drv_event *const ev)
+{
+    struct drv_ps1_pad *const ret = malloc(sizeof *ret);
+
+    if (!ret)
+        return NULL;
+
+    *ret = (const struct drv_ps1_pad){.ev = ev};
+    return ret;
+}
diff --git a/src/drv/ps1/pad/src/update.c b/src/drv/ps1/pad/src/update.c
new file mode 100644
index 0000000..9c9acfe
--- /dev/null
+++ b/src/drv/ps1/pad/src/update.c
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/pad.h>
+#include <drv/event.h>
+
+int drv_ps1_pad_update(struct drv_ps1_pad *const pad)
+{
+    /* TODO */
+    return 0;
+}
diff --git a/src/drv/ps1/private_include/drv/ps1/types.h b/src/drv/ps1/private_include/drv/ps1/types.h
new file mode 100644
index 0000000..35cb14e
--- /dev/null
+++ b/src/drv/ps1/private_include/drv/ps1/types.h
@@ -0,0 +1,35 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_TYPES_H
+#define DRV_PS1_TYPES_H
+
+#include <drv/ps1/cd.h>
+#include <drv/ps1/mc.h>
+#include <drv/ps1/pad.h>
+#include <drv/ps1/sio.h>
+
+struct drv_port
+{
+    struct drv_ps1_mc *mc;
+    struct drv_ps1_cd *cd;
+    struct drv_ps1_pad *pad;
+    struct drv_ps1_sio *sio;
+};
+
+#endif
diff --git a/src/drv/ps1/rcnt/CMakeLists.txt b/src/drv/ps1/rcnt/CMakeLists.txt
new file mode 100644
index 0000000..f5b5171
--- /dev/null
+++ b/src/drv/ps1/rcnt/CMakeLists.txt
@@ -0,0 +1,22 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_rcnt)
+add_subdirectory(src)
+target_include_directories(drv_ps1_rcnt PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_rcnt
+    PUBLIC c
+    PRIVATE drv_ps1_bios drv_ps1_irq drv_ps1_event)
diff --git a/src/drv/ps1/rcnt/include/drv/ps1/rcnt.h b/src/drv/ps1/rcnt/include/drv/ps1/rcnt.h
new file mode 100644
index 0000000..831012c
--- /dev/null
+++ b/src/drv/ps1/rcnt/include/drv/ps1/rcnt.h
@@ -0,0 +1,45 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_RCNT_H
+#define DRV_PS1_RCNT_H
+
+#include <stdint.h>
+
+union drv_ps1_rcnt_cfg
+{
+    struct
+    {
+        uint32_t sync_enable :1, sync_mode :2, reset :1, irq_tgt :1,
+            irq_max :1, repeat :1, pulse_toggle :1, clocksrc :2, intreq :1;
+    } bits;
+
+    uint32_t word;
+};
+
+enum drv_ps1_rcnt
+{
+    DRV_PS1_RCNT0,
+    DRV_PS1_RCNT1,
+    DRV_PS1_RCNT2
+};
+
+int drv_ps1_rcnt_init(enum drv_ps1_rcnt rcnt, uint16_t target,
+    const union drv_ps1_rcnt_cfg *cfg, int (*f)(void));
+
+#endif
diff --git a/src/drv/ps1/rcnt/private_include/drv/ps1/rcnt/regs.h b/src/drv/ps1/rcnt/private_include/drv/ps1/rcnt/regs.h
new file mode 100644
index 0000000..a6c9750
--- /dev/null
+++ b/src/drv/ps1/rcnt/private_include/drv/ps1/rcnt/regs.h
@@ -0,0 +1,36 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_RCNT_REGS_H
+#define DRV_PS1_RCNT_REGS_H
+
+#include <drv/ps1/rcnt.h>
+#include <stdint.h>
+
+struct rcnt_value
+{
+    uint32_t value :16, :16;
+};
+
+#define RCNT_BASE(n) (0x1f801100 + (n << 4))
+#define RCNT_REG(n, m) (RCNT_BASE(n) + m)
+#define RCNT_VALUE(n) ((volatile struct rcnt_value *)RCNT_REG(n, 0))
+#define RCNT_MODE(n) ((volatile union drv_ps1_rcnt_cfg *)RCNT_REG(n, 4))
+#define RCNT_TARGET(n) ((volatile struct rcnt_value *)RCNT_REG(n, 8))
+
+#endif
diff --git a/src/drv/ps1/rcnt/src/CMakeLists.txt b/src/drv/ps1/rcnt/src/CMakeLists.txt
new file mode 100644
index 0000000..4e8eb88
--- /dev/null
+++ b/src/drv/ps1/rcnt/src/CMakeLists.txt
@@ -0,0 +1,19 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_rcnt PRIVATE
+    init.c
+)
diff --git a/src/drv/ps1/rcnt/src/init.c b/src/drv/ps1/rcnt/src/init.c
new file mode 100644
index 0000000..0c4327c
--- /dev/null
+++ b/src/drv/ps1/rcnt/src/init.c
@@ -0,0 +1,62 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/rcnt.h>
+#include <drv/ps1/rcnt/regs.h>
+#include <drv/ps1/event.h>
+#include <drv/ps1/irq.h>
+#include <drv/ps1/bios.h>
+#include <stddef.h>
+#include <stdint.h>
+
+int drv_ps1_rcnt_init(const enum drv_ps1_rcnt rcnt, const uint16_t target,
+    const union drv_ps1_rcnt_cfg *const cfg, int (*const f)(void))
+{
+    int class;
+
+    EnterCriticalSection();
+    RCNT_TARGET(rcnt)->value = target;
+    *RCNT_MODE(rcnt) = *cfg;
+
+    switch (rcnt)
+    {
+        case DRV_PS1_RCNT0:
+            I_MASK->bits.tmr0 = 1;
+            class = CLASS_RTC0;
+            break;
+        case DRV_PS1_RCNT1:
+            I_MASK->bits.tmr1 = 1;
+            class = CLASS_RTC1;
+            break;
+        case DRV_PS1_RCNT2:
+            I_MASK->bits.tmr2 = 1;
+            class = CLASS_RTC2;
+            break;
+    }
+
+    ExitCriticalSection();
+
+    const int event = drv_ps1_event_open(class, SPEC_INTERRUPTED,
+        MODE_EXECUTE, f);
+
+    if (event == -1)
+        return -1;
+
+    drv_ps1_event_enable(event);
+    return 0;
+}
diff --git a/src/drv/ps1/sio/CMakeLists.txt b/src/drv/ps1/sio/CMakeLists.txt
new file mode 100644
index 0000000..f382e08
--- /dev/null
+++ b/src/drv/ps1/sio/CMakeLists.txt
@@ -0,0 +1,22 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_sio)
+add_subdirectory(src)
+target_include_directories(drv_ps1_sio PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_sio
+    PUBLIC c
+    PRIVATE drv drv_ps1_bios drv_ps1_cpu drv_ps1_irq)
diff --git a/src/drv/ps1/sio/include/drv/ps1/sio.h b/src/drv/ps1/sio/include/drv/ps1/sio.h
new file mode 100644
index 0000000..3fabadd
--- /dev/null
+++ b/src/drv/ps1/sio/include/drv/ps1/sio.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_H
+#define DRV_PS1_SIO_H
+
+#include <drv/event.h>
+
+struct drv_ps1_sio *drv_ps1_sio_init(const struct drv_event *ev);
+int drv_ps1_sio_update(struct drv_ps1_sio *sio);
+void drv_ps1_sio_free(struct drv_ps1_sio *sio);
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/ops.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/ops.h
new file mode 100644
index 0000000..a481fa9
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/ops.h
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_OPS_H
+#define DRV_PS1_SIO_OPS_H
+
+#include <drv/event.h>
+#include <sys/types.h>
+
+int drv_ps1_sio_read(void *buf, size_t n, off_t offset,
+    const struct drv_event_done *done, void *args);
+int drv_ps1_sio_read_nb(void *buf, size_t n, void *args);
+int drv_ps1_sio_write(const void *buf, size_t n,
+    const struct drv_event_done *done, void *args);
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/regs.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/regs.h
new file mode 100644
index 0000000..16b2bca
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/regs.h
@@ -0,0 +1,136 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_REGS_H
+#define DRV_PS1_SIO_REGS_H
+
+#include <stdint.h>
+
+struct sio_tx_data
+{
+    uint32_t value :8, :24;
+};
+
+struct sio_rx_data
+{
+    uint8_t values[4];
+};
+
+union sio_stat
+{
+    struct
+    {
+        uint32_t
+            tx_ready_started :1,
+            rx_fifo_not_empty :1,
+            tx_ready_finished :1,
+            rx_parity_error :1,
+            rx_fifo_overrun :1,
+            rx_bad_stp :1,
+            rx_inverted :1,
+            dsr :1,
+            cts :1,
+            irqreq :1,
+            :1,
+            baudrate :15, :6;
+    } bits;
+
+    uint32_t mask;
+};
+
+union sio_mode
+{
+    struct
+    {
+        uint16_t
+            baudrate_mul :2,
+            len :2,
+            parity_en :1,
+            parity_odd :1,
+            stplen :2,
+            :8;
+    } bits;
+
+    uint16_t mask;
+};
+
+union sio_ctrl
+{
+    struct
+    {
+        uint16_t
+            tx_en :1,
+            dtr :1,
+            rx_en :1,
+            tx_invert :1,
+            ack :1,
+            rts :1,
+            reset :1,
+            :1,
+            rx_int_mode :2,
+            tx_int_en :1,
+            rx_int_en :1,
+            dsr_int_en :1,
+            :3;
+    } bits;
+
+    uint16_t mask;
+};
+
+enum
+{
+    SIO_CTRL_RX_INT_1,
+    SIO_CTRL_RX_INT_2,
+    SIO_CTRL_RX_INT_3,
+    SIO_CTRL_RX_INT_4
+};
+
+enum
+{
+    SIO_MODE_FACTOR_STOP,
+    SIO_MODE_FACTOR_MUL1,
+    SIO_MODE_FACTOR_MUL16,
+    SIO_MODE_FACTOR_MUL64
+};
+
+enum
+{
+    SIO_MODE_LEN_5,
+    SIO_MODE_LEN_6,
+    SIO_MODE_LEN_7,
+    SIO_MODE_LEN_8
+};
+
+enum
+{
+    SIO_MODE_STP_RESERVED,
+    SIO_MODE_STP_1,
+    SIO_MODE_STP_1_5,
+    SIO_MODE_STP_2,
+};
+
+#define SIO_BASE 0x1f801050
+#define SIO_REG(n) (SIO_BASE + n)
+#define SIO_TX_DATA ((volatile struct sio_tx_data *)SIO_REG(0))
+#define SIO_RX_DATA ((const volatile struct sio_rx_data *)SIO_REG(0))
+#define SIO_STAT ((const volatile union sio_stat *)SIO_REG(4))
+#define SIO_MODE ((volatile union sio_mode *)SIO_REG(8))
+#define SIO_CTRL ((volatile union sio_ctrl *)SIO_REG(10))
+#define SIO_BAUD (*(volatile uint16_t *)SIO_REG(14))
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/routines.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/routines.h
new file mode 100644
index 0000000..f5b97da
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/routines.h
@@ -0,0 +1,27 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_ROUTINES_H
+#define DRV_PS1_SIO_ROUTINES_H
+
+#include <drv/ps1/sio/types.h>
+
+int drv_ps1_sio_irq(void);
+int drv_ps1_sio_next(struct sio_fifo *f);
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/types.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/types.h
new file mode 100644
index 0000000..87dd412
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/types.h
@@ -0,0 +1,65 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_TYPES_H
+#define DRV_PS1_SIO_TYPES_H
+
+#include <drv/event.h>
+#include <stdbool.h>
+
+struct sio_req
+{
+    union
+    {
+        struct sio_req_r
+        {
+            void *buf;
+            size_t n;
+        } r;
+
+        struct sio_req_w
+        {
+            const void *buf;
+            size_t n;
+        } w;
+    } u;
+
+    int (*f)(void);
+    struct drv_event_done done;
+    struct sio_req *next;
+};
+
+struct sio_fifo
+{
+    char buf[192];
+    size_t proc, pend;
+    struct sio_req *head, *tail;
+    int (*next)(void);
+};
+
+struct drv_ps1_sio
+{
+    bool init;
+    int event;
+    struct sio_fifo rx, tx;
+    struct drv_event ev;
+};
+
+extern struct drv_ps1_sio drv_ps1_sio;
+
+#endif
diff --git a/src/drv/ps1/sio/src/CMakeLists.txt b/src/drv/ps1/sio/src/CMakeLists.txt
new file mode 100644
index 0000000..1bcf5cf
--- /dev/null
+++ b/src/drv/ps1/sio/src/CMakeLists.txt
@@ -0,0 +1,29 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_sio PRIVATE
+    free.c
+    globals.c
+    init.c
+    irq.c
+    next.c
+    read.c
+    read_nb.c
+    update.c
+    write.c
+)
+
+target_link_libraries(drv_ps1_sio PRIVATE kprintf)
diff --git a/src/drv/ps1/sio/src/free.c b/src/drv/ps1/sio/src/free.c
new file mode 100644
index 0000000..5c506d0
--- /dev/null
+++ b/src/drv/ps1/sio/src/free.c
@@ -0,0 +1,23 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio.h>
+
+void drv_ps1_sio_free(struct drv_ps1_sio *const sio)
+{
+}
diff --git a/src/drv/ps1/sio/src/globals.c b/src/drv/ps1/sio/src/globals.c
new file mode 100644
index 0000000..35c72b8
--- /dev/null
+++ b/src/drv/ps1/sio/src/globals.c
@@ -0,0 +1,21 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio/types.h>
+
+struct drv_ps1_sio drv_ps1_sio;
diff --git a/src/drv/ps1/sio/src/init.c b/src/drv/ps1/sio/src/init.c
new file mode 100644
index 0000000..6bf44fc
--- /dev/null
+++ b/src/drv/ps1/sio/src/init.c
@@ -0,0 +1,70 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio.h>
+#include <drv/ps1/sio/ops.h>
+#include <drv/ps1/sio/regs.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <drv/ps1/bios.h>
+#include <drv/ps1/cpu.h>
+#include <drv/ps1/irq.h>
+#include <drv/event.h>
+
+struct drv_ps1_sio *drv_ps1_sio_init(const struct drv_event *const ev)
+{
+    const unsigned long baudrate = 115200ul;
+
+    SIO_CTRL->bits.reset = 1;
+    SIO_BAUD = DRV_PS1_CPU_F / (16 * baudrate);
+    SIO_MODE->mask = (const union sio_mode)
+    {
+        .bits =
+        {
+            .baudrate_mul = SIO_MODE_FACTOR_MUL16,
+            .stplen = SIO_MODE_STP_1,
+            .len = SIO_MODE_LEN_8
+        }
+    }.mask;
+
+    SIO_CTRL->mask = (const union sio_ctrl)
+    {
+        .bits =
+        {
+            .rx_int_mode = SIO_CTRL_RX_INT_1,
+            .rx_int_en = 1,
+            .tx_en = 1,
+            .rx_en = 1,
+            .rts = 1,
+            .dtr = 1
+        }
+    }.mask;
+
+    static struct drv_ps1_irq_src src =
+    {
+        .mask = 1 << IRQ_SIO,
+        .fn = drv_ps1_sio_irq
+    };
+
+    if (drv_ps1_irq_set(&src))
+        return NULL;
+
+    I_MASK->bits.sio = 1;
+    drv_ps1_sio.ev = *ev;
+    return &drv_ps1_sio;
+}
diff --git a/src/drv/ps1/sio/src/irq.c b/src/drv/ps1/sio/src/irq.c
new file mode 100644
index 0000000..5a19d83
--- /dev/null
+++ b/src/drv/ps1/sio/src/irq.c
@@ -0,0 +1,71 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio.h>
+#include <drv/ps1/sio/ops.h>
+#include <drv/ps1/sio/regs.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <drv/ps1/bios.h>
+#include <drv/ps1/cpu.h>
+#include <drv/ps1/irq.h>
+#include <drv/event.h>
+
+int irq_sio_overrun;
+
+static int read_rx(struct sio_fifo *const f)
+{
+    const unsigned char v = *SIO_RX_DATA->values;
+    size_t n = f->pend + 1;
+
+    if (n >= sizeof f->buf)
+        n = 0;
+
+    if (n == f->proc)
+    {
+        irq_sio_overrun = 1;
+        return -1;
+    }
+
+    f->buf[f->pend = n] = v;
+    return 0;
+}
+
+volatile unsigned sio_read;
+volatile int sw_overrun;
+
+int drv_ps1_sio_irq(void)
+{
+    SIO_CTRL->bits.rts = 0;
+
+    while (SIO_STAT->bits.rx_fifo_not_empty)
+    {
+        if (read_rx(&drv_ps1_sio.rx))
+        {
+            sw_overrun = 1;
+            break;
+        }
+
+        sio_read++;
+    }
+
+    SIO_CTRL->bits.rts = 1;
+    I_STAT->bits.sio = 0;
+    SIO_CTRL->bits.ack = 1;
+    return 0;
+}
diff --git a/src/drv/ps1/sio/src/next.c b/src/drv/ps1/sio/src/next.c
new file mode 100644
index 0000000..4c330ab
--- /dev/null
+++ b/src/drv/ps1/sio/src/next.c
@@ -0,0 +1,34 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+int drv_ps1_sio_next(struct sio_fifo *const f)
+{
+    struct sio_req *const next = f->head->next;
+
+    free(f->head);
+
+    f->next = next ? next->f : NULL;
+    f->head = next;
+    return 0;
+}
diff --git a/src/drv/ps1/sio/src/read.c b/src/drv/ps1/sio/src/read.c
new file mode 100644
index 0000000..e13ad29
--- /dev/null
+++ b/src/drv/ps1/sio/src/read.c
@@ -0,0 +1,125 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio/ops.h>
+#include <drv/ps1/sio/regs.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <drv/ps1/bios.h>
+#include <drv/ps1/irq.h>
+#include <drv/event.h>
+#include <kprintf.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stdlib.h>
+
+static int load(void);
+
+static int check(void)
+{
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->rx;
+    struct sio_req *const req = f->head;
+    struct sio_req_r *const r = &req->u.r;
+
+    if (!r->n)
+    {
+        const struct drv_event_done *const d = &req->done;
+
+        if (d->f && d->f(SUCCESS, d->args))
+            return -1;
+
+        return drv_ps1_sio_next(f);
+    }
+
+    f->next = load;
+    return 0;
+}
+
+static void read_fifo(struct drv_ps1_sio *const s)
+{
+    struct sio_fifo *const f = &s->rx;
+    struct sio_req *const req = f->head;
+    struct sio_req_r *const r = &req->u.r;
+    char *p = r->buf;
+
+    I_MASK->bits.sio = 0;
+    SIO_CTRL->bits.rts = 0;
+
+    while (r->n)
+    {
+        if (f->pend == f->proc)
+            break;
+
+        size_t n = f->proc + 1;
+
+        if (n >= sizeof f->buf)
+            n = 0;
+
+        *p++ = f->buf[f->proc = n];
+        r->buf = p;
+        r->n--;
+    }
+
+    SIO_CTRL->bits.rts = 1;
+    I_MASK->bits.sio = 1;
+}
+
+static int load(void)
+{
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->rx;
+    struct sio_req_r *const r = &f->head->u.r;
+
+    read_fifo(s);
+
+    if (!r->n)
+        f->next = check;
+
+    return 0;
+}
+
+int drv_ps1_sio_read(void *const buf, const size_t n, const off_t offset,
+    const struct drv_event_done *const done, void *const args)
+{
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->rx;
+    struct sio_req *const req = malloc(sizeof *req);
+
+    if (!req)
+        return -1;
+
+    *req = (const struct sio_req)
+    {
+        .f = load,
+        .done = *done,
+        .u.r =
+        {
+            .buf = buf,
+            .n = n
+        }
+    };
+
+    if (!f->head)
+        f->head = req;
+    else
+        f->tail->next = req;
+
+    f->tail = req;
+    return 0;
+}
diff --git a/src/drv/ps1/sio/src/read_nb.c b/src/drv/ps1/sio/src/read_nb.c
new file mode 100644
index 0000000..755c5cf
--- /dev/null
+++ b/src/drv/ps1/sio/src/read_nb.c
@@ -0,0 +1,61 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio/ops.h>
+#include <drv/ps1/sio/regs.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <drv/ps1/irq.h>
+#include <drv/ps1/bios.h>
+#include <drv/event.h>
+#include <kprintf.h>
+#include <sys/types.h>
+
+static int read_fifo(char *buf, size_t n)
+{
+    int ret = 0;
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->rx;
+
+    I_MASK->bits.sio = 0;
+    SIO_CTRL->bits.rts = 0;
+
+    while (n)
+    {
+        if (f->pend == f->proc)
+            break;
+
+        size_t m = f->proc + 1;
+
+        if (m >= sizeof f->buf)
+            m = 0;
+
+        *buf++ = f->buf[f->proc = m];
+        n--;
+        ret++;
+    }
+
+    SIO_CTRL->bits.rts = 1;
+    I_MASK->bits.sio = 1;
+    return ret;
+}
+
+int drv_ps1_sio_read_nb(void *const buf, const size_t n, void *const args)
+{
+    return read_fifo(buf, n);
+}
diff --git a/src/drv/ps1/sio/src/update.c b/src/drv/ps1/sio/src/update.c
new file mode 100644
index 0000000..eac875c
--- /dev/null
+++ b/src/drv/ps1/sio/src/update.c
@@ -0,0 +1,98 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio.h>
+#include <drv/ps1/sio/ops.h>
+#include <drv/ps1/sio/regs.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <drv/event.h>
+#include <kprintf.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+static int init(struct drv_ps1_sio *const s)
+{
+    if (s->init)
+        return 0;
+
+    const struct drv_event *const ev = &s->ev;
+    static const struct drv_event_ops ops =
+    {
+        .read = drv_ps1_sio_read,
+        .read_nb = drv_ps1_sio_read_nb,
+        .write = drv_ps1_sio_write
+    };
+
+    if (ev->status("ttyS0", &ops, true, 0660, ev->args))
+        return -1;
+
+    s->init = true;
+    return 0;
+}
+
+static int rx(struct drv_ps1_sio *const s)
+{
+    struct sio_fifo *const f = &s->rx;
+
+    if (f->next)
+        return f->next();
+    else if (f->head)
+        f->next = f->head->f;
+
+    return 0;
+}
+
+static void write_tx(struct sio_fifo *const f)
+{
+    if (f->proc == f->pend)
+        return;
+
+    size_t n = f->proc + 1;
+
+    if (n >= sizeof f->buf)
+        n = 0;
+
+    SIO_TX_DATA->value = f->buf[f->proc = n];
+}
+
+static int tx(struct drv_ps1_sio *const s)
+{
+    struct sio_fifo *const f = &s->tx;
+
+    if (SIO_STAT->bits.tx_ready_started)
+        write_tx(f);
+
+    if (f->next)
+        return f->next();
+    else if (f->head)
+        f->next = f->head->f;
+
+    return 0;
+}
+
+int drv_ps1_sio_update(struct drv_ps1_sio *const s)
+{
+    if (SIO_STAT->bits.rx_fifo_overrun)
+        SIO_CTRL->bits.ack = 1;
+
+    if (init(s) || rx(s) || tx(s))
+        return -1;
+
+    return 0;
+}
diff --git a/src/drv/ps1/sio/src/write.c b/src/drv/ps1/sio/src/write.c
new file mode 100644
index 0000000..942456f
--- /dev/null
+++ b/src/drv/ps1/sio/src/write.c
@@ -0,0 +1,117 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/sio/ops.h>
+#include <drv/ps1/sio/routines.h>
+#include <drv/ps1/sio/types.h>
+#include <drv/ps1/bios.h>
+#include <drv/event.h>
+#include <kprintf.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+static int store(void);
+
+static void write_fifo(struct drv_ps1_sio *const s)
+{
+    struct sio_fifo *const f = &s->tx;
+    struct sio_req *const r = f->head;
+    struct sio_req_w *const w = &r->u.w;
+    const char *p = w->buf;
+
+    while (w->n)
+    {
+        size_t n = f->pend + 1;
+
+        if (n >= sizeof f->buf)
+            n = 0;
+        else if (n == f->proc)
+            break;
+
+        f->buf[f->pend = n] = *p++;
+        w->buf = p;
+        w->n--;
+    }
+}
+
+static int check(void)
+{
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->tx;
+    struct sio_req *const r = f->head;
+    struct sio_req_w *const w = &r->u.w;
+
+    if (!w->n)
+    {
+        const struct drv_event_done *const d = &r->done;
+
+        if (d->f && d->f(SUCCESS, d->args))
+            return -1;
+
+        return drv_ps1_sio_next(f);
+    }
+
+    f->next = store;
+    return 0;
+}
+
+static int store(void)
+{
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->tx;
+    struct sio_req_w *const w = &f->head->u.w;
+
+    write_fifo(s);
+
+    if (!w->n)
+        f->next = check;
+
+    return 0;
+}
+
+int drv_ps1_sio_write(const void *const buf, const size_t n,
+    const struct drv_event_done *const done, void *const args)
+{
+    struct drv_ps1_sio *const s = &drv_ps1_sio;
+    struct sio_fifo *const f = &s->tx;
+    struct sio_req *const req = malloc(sizeof *req);
+
+    if (!req)
+        return -1;
+
+    *req = (const struct sio_req)
+    {
+        .f = store,
+        .done = *done,
+        .u.w =
+        {
+            .buf = buf,
+            .n = n
+        }
+    };
+
+    if (!f->head)
+        f->head = req;
+    else
+        f->tail->next = req;
+
+    f->tail = req;
+    return 0;
+}
diff --git a/src/drv/ps1/src/CMakeLists.txt b/src/drv/ps1/src/CMakeLists.txt
new file mode 100644
index 0000000..34042e3
--- /dev/null
+++ b/src/drv/ps1/src/CMakeLists.txt
@@ -0,0 +1,21 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1 PRIVATE
+    free.c
+    init.c
+    update.c
+)
diff --git a/src/drv/ps1/src/free.c b/src/drv/ps1/src/free.c
new file mode 100644
index 0000000..62be1b1
--- /dev/null
+++ b/src/drv/ps1/src/free.c
@@ -0,0 +1,32 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1.h>
+#include <drv/ps1/types.h>
+#include <drv/ps1/cd.h>
+#include <drv/ps1/mc.h>
+#include <drv/ps1/pad.h>
+#include <drv/ps1/sio.h>
+
+void drv_ps1_free(struct drv_port *const p)
+{
+    drv_ps1_mc_free(p->mc);
+    drv_ps1_cd_free(p->cd);
+    drv_ps1_pad_free(p->pad);
+    drv_ps1_sio_free(p->sio);
+}
diff --git a/src/drv/ps1/src/init.c b/src/drv/ps1/src/init.c
new file mode 100644
index 0000000..8ee92a6
--- /dev/null
+++ b/src/drv/ps1/src/init.c
@@ -0,0 +1,59 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1.h>
+#include <drv/ps1/types.h>
+#include <drv/ps1/cd.h>
+#include <drv/ps1/mc.h>
+#include <drv/ps1/pad.h>
+#include <drv/ps1/sio.h>
+#include <stdlib.h>
+
+struct drv_port *drv_ps1_init(const struct drv_event *const ev)
+{
+    struct drv_port *ret = NULL;
+    struct drv_ps1_mc *mc = NULL;
+    struct drv_ps1_cd *cd = NULL;
+    struct drv_ps1_pad *pad = NULL;
+    struct drv_ps1_sio *sio = NULL;
+
+    if (!(mc = drv_ps1_mc_init(ev))
+        || !(cd = drv_ps1_cd_init(ev))
+        || !(pad = drv_ps1_pad_init(ev))
+        || !(sio = drv_ps1_sio_init(ev))
+        || !(ret = malloc(sizeof *ret)))
+        goto failure;
+
+    *ret = (const struct drv_port)
+    {
+        .mc = mc,
+        .cd = cd,
+        .pad = pad,
+        .sio = sio
+    };
+
+    return ret;
+
+failure:
+    drv_ps1_mc_free(mc);
+    drv_ps1_cd_free(cd);
+    drv_ps1_pad_free(pad);
+    drv_ps1_sio_free(sio);
+    free(mc);
+    return NULL;
+}
diff --git a/src/drv/ps1/src/update.c b/src/drv/ps1/src/update.c
new file mode 100644
index 0000000..49b22bb
--- /dev/null
+++ b/src/drv/ps1/src/update.c
@@ -0,0 +1,35 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1.h>
+#include <drv/ps1/types.h>
+#include <drv/ps1/cd.h>
+#include <drv/ps1/mc.h>
+#include <drv/ps1/pad.h>
+#include <drv/ps1/sio.h>
+
+int drv_ps1_update(struct drv_port *const p)
+{
+    if (drv_ps1_mc_update(p->mc)
+        || drv_ps1_cd_update(p->cd)
+        || drv_ps1_pad_update(p->pad)
+        || drv_ps1_sio_update(p->sio))
+        return -1;
+
+    return 0;
+}
diff --git a/src/drv/ps1/time/CMakeLists.txt b/src/drv/ps1/time/CMakeLists.txt
new file mode 100644
index 0000000..93c0143
--- /dev/null
+++ b/src/drv/ps1/time/CMakeLists.txt
@@ -0,0 +1,22 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_time)
+add_subdirectory(src)
+target_include_directories(drv_ps1_time PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_time
+    PUBLIC c
+    PRIVATE drv drv_ps1_bios drv_ps1_irq drv_ps1_rcnt)
diff --git a/src/drv/ps1/time/include/drv/ps1/time.h b/src/drv/ps1/time/include/drv/ps1/time.h
new file mode 100644
index 0000000..f644b59
--- /dev/null
+++ b/src/drv/ps1/time/include/drv/ps1/time.h
@@ -0,0 +1,24 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_TIME_H
+#define DRV_PS1_TIME_H
+
+int drv_ps1_time_tick(void);
+
+#endif
diff --git a/src/drv/ps1/time/private_include/drv/ps1/time/types.h b/src/drv/ps1/time/private_include/drv/ps1/time/types.h
new file mode 100644
index 0000000..2e673fb
--- /dev/null
+++ b/src/drv/ps1/time/private_include/drv/ps1/time/types.h
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_TIME_TYPES_H
+#define DRV_PS1_TIME_TYPES_H
+
+#include <time.h>
+
+extern volatile struct timespec drv_ps1_time;
+
+#endif
diff --git a/src/drv/ps1/time/src/CMakeLists.txt b/src/drv/ps1/time/src/CMakeLists.txt
new file mode 100644
index 0000000..d8ebf38
--- /dev/null
+++ b/src/drv/ps1/time/src/CMakeLists.txt
@@ -0,0 +1,23 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_time PRIVATE
+    gettime.c
+    getres.c
+    globals.c
+    settime.c
+    tick.c
+)
diff --git a/src/drv/ps1/time/src/getres.c b/src/drv/ps1/time/src/getres.c
new file mode 100644
index 0000000..de69ff5
--- /dev/null
+++ b/src/drv/ps1/time/src/getres.c
@@ -0,0 +1,34 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/time.h>
+#include <errno.h>
+#include <time.h>
+
+int drv_time_getres(const clockid_t id, struct timespec *const ts)
+{
+    if (id != CLOCK_REALTIME)
+    {
+        errno = EINVAL;
+        return -1;
+    }
+    else if (ts)
+        *ts = (const struct timespec){.tv_nsec = 1000000};
+
+    return 0;
+}
diff --git a/src/drv/ps1/time/src/gettime.c b/src/drv/ps1/time/src/gettime.c
new file mode 100644
index 0000000..0fdbfea
--- /dev/null
+++ b/src/drv/ps1/time/src/gettime.c
@@ -0,0 +1,38 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/time.h>
+#include <drv/ps1/time/types.h>
+#include <drv/ps1/bios.h>
+#include <drv/ps1/irq.h>
+#include <errno.h>
+#include <time.h>
+
+int drv_time_gettime(const clockid_t id, struct timespec *const ts)
+{
+    if (id != CLOCK_REALTIME)
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    I_MASK->bits.tmr2 = 0;
+    *ts = drv_ps1_time;
+    I_MASK->bits.tmr2 = 1;
+    return 0;
+}
diff --git a/src/drv/ps1/time/src/globals.c b/src/drv/ps1/time/src/globals.c
new file mode 100644
index 0000000..2f53665
--- /dev/null
+++ b/src/drv/ps1/time/src/globals.c
@@ -0,0 +1,22 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/time/types.h>
+#include <time.h>
+
+volatile struct timespec drv_ps1_time;
diff --git a/src/drv/ps1/time/src/settime.c b/src/drv/ps1/time/src/settime.c
new file mode 100644
index 0000000..f2ac5fe
--- /dev/null
+++ b/src/drv/ps1/time/src/settime.c
@@ -0,0 +1,37 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/time.h>
+#include <drv/ps1/time/types.h>
+#include <drv/ps1/bios.h>
+#include <errno.h>
+#include <time.h>
+
+int drv_time_settime(const clockid_t id, const struct timespec *const ts)
+{
+    if (id != CLOCK_REALTIME)
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    EnterCriticalSection();
+    drv_ps1_time = *ts;
+    ExitCriticalSection();
+    return 0;
+}
diff --git a/src/drv/ps1/time/src/tick.c b/src/drv/ps1/time/src/tick.c
new file mode 100644
index 0000000..494d8ed
--- /dev/null
+++ b/src/drv/ps1/time/src/tick.c
@@ -0,0 +1,42 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/time.h>
+#include <drv/ps1/time/types.h>
+#include <drv/ps1/irq.h>
+#include <time.h>
+
+int drv_ps1_time_tick(void)
+{
+    int ret = 0;
+    struct timespec ts;
+    volatile struct timespec *const t = &drv_ps1_time;
+
+    if (clock_getres(CLOCK_REALTIME, &ts))
+        ret = -1;
+    else if (t->tv_nsec >= 1000000000 - ts.tv_nsec)
+    {
+        t->tv_sec++;
+        t->tv_nsec = 0;
+    }
+    else
+        t->tv_nsec += ts.tv_nsec;
+
+    I_STAT->bits.tmr2 = 0;
+    return ret;
+}
diff --git a/src/drv/src/CMakeLists.txt b/src/drv/src/CMakeLists.txt
new file mode 100644
index 0000000..e567c1c
--- /dev/null
+++ b/src/drv/src/CMakeLists.txt
@@ -0,0 +1,22 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv PRIVATE
+    free.c
+    init.c
+    tree.c
+    update.c
+)
diff --git a/src/drv/src/free.c b/src/drv/src/free.c
new file mode 100644
index 0000000..2c324c0
--- /dev/null
+++ b/src/drv/src/free.c
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/drv.h>
+#include <drv/tree.h>
+#include <drv/types.h>
+#include <stdlib.h>
+
+void drv_free(struct drv *const d)
+{
+    if (d)
+        for (size_t i = 0; i < d->n; i++)
+            drv_tree_free[i](d->ports[i]);
+
+    free(d);
+}
diff --git a/src/drv/src/init.c b/src/drv/src/init.c
new file mode 100644
index 0000000..4b89f15
--- /dev/null
+++ b/src/drv/src/init.c
@@ -0,0 +1,62 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/drv.h>
+#include <drv/types.h>
+#include <drv/tree.h>
+#include <drv/port.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+struct drv *drv_init(const struct drv_event *const ev)
+{
+    size_t init = 0;
+    struct drv *const ret = malloc(sizeof *ret);
+    struct drv_port **const ports = malloc(drv_tree_n * sizeof *ports);
+
+    if (!ports || !ret)
+        goto failure;
+
+    for (size_t i = 0; i < drv_tree_n; i++, init++)
+    {
+        struct drv_port *const p = drv_tree_init[i](ev);
+
+        if (!p)
+            goto failure;
+
+        ports[i] = p;
+    }
+
+    *ret = (const struct drv)
+    {
+        .ports = ports,
+        .n = drv_tree_n
+    };
+
+    return ret;
+
+failure:
+
+    if (ports)
+        for (size_t i = 0; i < init; i++)
+            drv_tree_free[i](ports[i]);
+
+    free(ports);
+    free(ret);
+    return NULL;
+}
diff --git a/src/drv/src/tree.c b/src/drv/src/tree.c
new file mode 100644
index 0000000..d52df3d
--- /dev/null
+++ b/src/drv/src/tree.c
@@ -0,0 +1,51 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/drv.h>
+#include <drv/tree.h>
+#include <drv/tty.h>
+#include <drv/port.h>
+#include <stddef.h>
+
+struct drv_port *(*const drv_tree_init[])(const struct drv_event *) =
+{
+#if DRV_PS1
+    drv_ps1_init,
+#endif
+    drv_tty_init
+};
+
+enum {N = sizeof drv_tree_init / sizeof *drv_tree_init};
+
+int (*const drv_tree_update[N])(struct drv_port *) =
+{
+#if DRV_PS1
+    drv_ps1_update,
+#endif
+    drv_tty_update
+};
+
+void (*const drv_tree_free[N])(struct drv_port *) =
+{
+#if DRV_PS1
+    drv_ps1_free,
+#endif
+    drv_tty_free
+};
+
+const size_t drv_tree_n = N;
diff --git a/src/drv/src/update.c b/src/drv/src/update.c
new file mode 100644
index 0000000..268c2b6
--- /dev/null
+++ b/src/drv/src/update.c
@@ -0,0 +1,32 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/drv.h>
+#include <drv/tree.h>
+#include <drv/types.h>
+#include <drv/port.h>
+#include <stddef.h>
+
+int drv_update(struct drv *const d)
+{
+    for (size_t i = 0; i < drv_tree_n; i++)
+        if (drv_tree_update[i](d->ports[i]))
+            return -1;
+
+    return 0;
+}
diff --git a/src/drv/tty/CMakeLists.txt b/src/drv/tty/CMakeLists.txt
new file mode 100644
index 0000000..ee14015
--- /dev/null
+++ b/src/drv/tty/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_tty)
+add_subdirectory(src)
+target_include_directories(drv_tty PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_tty PUBLIC c PRIVATE gfx drv_event)
diff --git a/src/drv/tty/include/drv/tty.h b/src/drv/tty/include/drv/tty.h
new file mode 100644
index 0000000..27804bf
--- /dev/null
+++ b/src/drv/tty/include/drv/tty.h
@@ -0,0 +1,28 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TTY_H
+#define DRV_TTY_H
+
+#include <drv/event.h>
+
+struct drv_port *drv_tty_init(const struct drv_event *ev);
+int drv_tty_update(struct drv_port *p);
+void drv_tty_free(struct drv_port *p);
+
+#endif
diff --git a/src/drv/tty/private_include/drv/tty/font.h b/src/drv/tty/private_include/drv/tty/font.h
new file mode 100644
index 0000000..a36d68e
--- /dev/null
+++ b/src/drv/tty/private_include/drv/tty/font.h
@@ -0,0 +1,29 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TTY_FONT_H
+#define DRV_TTY_FONT_H
+
+#include <gfx/sprite.h>
+#include <stddef.h>
+
+struct gfx_sprite ttyfont_spr;
+extern const unsigned char ttyfont[];
+extern const size_t ttyfont_size;
+
+#endif
diff --git a/src/drv/tty/private_include/drv/tty/ops.h b/src/drv/tty/private_include/drv/tty/ops.h
new file mode 100644
index 0000000..b50b00a
--- /dev/null
+++ b/src/drv/tty/private_include/drv/tty/ops.h
@@ -0,0 +1,30 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TTY_OPS_H
+#define DRV_TTY_OPS_H
+
+#include <drv/event.h>
+#include <drv/tty/types.h>
+#include <stddef.h>
+
+int drv_tty_write(const void *buf, size_t n, const struct drv_event_done *done,
+    void *args);
+int drv_tty_setdim(struct drv_port *p, unsigned x, unsigned y);
+
+#endif
diff --git a/src/drv/tty/private_include/drv/tty/types.h b/src/drv/tty/private_include/drv/tty/types.h
new file mode 100644
index 0000000..38a1108
--- /dev/null
+++ b/src/drv/tty/private_include/drv/tty/types.h
@@ -0,0 +1,40 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_TTY_TYPES_H
+#define DRV_TTY_TYPES_H
+
+#include <drv/event.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+struct row
+{
+    char *columns;
+    size_t len;
+};
+
+struct drv_port
+{
+    bool init;
+    struct row *rows, *first_row, *last_row, *proc_row;
+    size_t nrows, ncolumns, last_column, last_proc_column;
+    struct drv_event ev;
+};
+
+#endif
diff --git a/src/drv/tty/src/CMakeLists.txt b/src/drv/tty/src/CMakeLists.txt
new file mode 100644
index 0000000..096b685
--- /dev/null
+++ b/src/drv/tty/src/CMakeLists.txt
@@ -0,0 +1,27 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_tty PRIVATE
+    free.c
+    init.c
+    setdim.c
+    update.c
+    write.c
+)
+
+if(PS1_BUILD)
+    add_subdirectory(ps1)
+endif()
diff --git a/src/drv/tty/src/free.c b/src/drv/tty/src/free.c
new file mode 100644
index 0000000..66d5cb4
--- /dev/null
+++ b/src/drv/tty/src/free.c
@@ -0,0 +1,39 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/event.h>
+#include <drv/tty.h>
+#include <drv/tty/font.h>
+#include <drv/tty/ops.h>
+#include <drv/tty/types.h>
+#include <gfx/gfx.h>
+#include <gfx/sprite.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+void drv_tty_free(struct drv_port *const p)
+{
+    if (!p)
+        return;
+
+    for (size_t i = 0; i < p->nrows; i++)
+        free(p->rows[i].columns);
+
+    free(p->rows);
+    free(p);
+}
diff --git a/src/drv/tty/src/init.c b/src/drv/tty/src/init.c
new file mode 100644
index 0000000..53299f4
--- /dev/null
+++ b/src/drv/tty/src/init.c
@@ -0,0 +1,58 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/event.h>
+#include <drv/tty.h>
+#include <drv/tty/font.h>
+#include <drv/tty/ops.h>
+#include <drv/tty/types.h>
+#include <gfx/gfx.h>
+#include <gfx/sprite.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int load(void *const buf, const size_t n, void *const args)
+{
+    size_t *const off = args;
+
+    memcpy(buf, ttyfont + *off, n);
+    *off += n;
+    return 0;
+}
+
+struct drv_port *drv_tty_init(const struct drv_event *const ev)
+{
+    size_t off = 0;
+    struct drv_port *ret = NULL;
+
+    if (!(ret = malloc(sizeof *ret)))
+        goto failure;
+
+    *ret = (const struct drv_port){.ev = *ev};
+    gfx_sprite_load(&ttyfont_spr, load, &off);
+
+    if (drv_tty_setdim(ret, screen_w, screen_h))
+        goto failure;
+
+    return ret;
+
+failure:
+    drv_tty_free(ret);
+    return NULL;
+}
diff --git a/src/drv/tty/src/ps1/CMakeLists.txt b/src/drv/tty/src/ps1/CMakeLists.txt
new file mode 100644
index 0000000..c07a45f
--- /dev/null
+++ b/src/drv/tty/src/ps1/CMakeLists.txt
@@ -0,0 +1,19 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_tty PRIVATE
+    ttyfont_tim.c
+)
diff --git a/src/drv/tty/src/ps1/ttyfont_tim.c b/src/drv/tty/src/ps1/ttyfont_tim.c
new file mode 100644
index 0000000..b7dd03b
--- /dev/null
+++ b/src/drv/tty/src/ps1/ttyfont_tim.c
@@ -0,0 +1,801 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* Derived from res/font.bmp. See res/orig/LICENSE for details. */
+
+#include <drv/tty/font.h>
+#include <stddef.h>
+
+const unsigned char ttyfont[] = {
+  0x10, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00,
+  0x80, 0x02, 0xf2, 0x01, 0x10, 0x00, 0x01, 0x00, 0x00, 0x00, 0xff, 0x7f,
+  0x2c, 0x34, 0x3e, 0x26, 0xdc, 0x01, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80,
+  0x40, 0x5f, 0x1f, 0x36, 0x9c, 0x03, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80,
+  0x00, 0x80, 0x00, 0x80, 0x0c, 0x24, 0x00, 0x00, 0x80, 0x02, 0x00, 0x00,
+  0x30, 0x00, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x01, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x10, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00, 0x10, 0x00, 0x00, 0x01,
+  0x01, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x10, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x01, 0x10, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00,
+  0x11, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x11, 0x01, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x11, 0x11, 0x11, 0x11, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x11, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x10,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x10, 0x01, 0x00, 0x00, 0x01, 0x10, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00,
+  0x11, 0x11, 0x11, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01,
+  0x10, 0x01, 0x10, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x10,
+  0x10, 0x01, 0x01, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x10,
+  0x11, 0x11, 0x01, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x11, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x11, 0x11, 0x10, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x10,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x00, 0x10,
+  0x11, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x11, 0x11, 0x00, 0x00, 0x00,
+  0x00, 0x10, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x10,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00
+};
+
+const size_t ttyfont_size = sizeof ttyfont;
diff --git a/src/drv/tty/src/setdim.c b/src/drv/tty/src/setdim.c
new file mode 100644
index 0000000..d1f835a
--- /dev/null
+++ b/src/drv/tty/src/setdim.c
@@ -0,0 +1,62 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/event.h>
+#include <drv/tty.h>
+#include <drv/tty/font.h>
+#include <drv/tty/ops.h>
+#include <drv/tty/types.h>
+#include <gfx/gfx.h>
+#include <gfx/sprite.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+int drv_tty_setdim(struct drv_port *const p, const unsigned w, const unsigned h)
+{
+    const unsigned columns = w / 10, rows = h / 16;
+    struct row *const prs = malloc(rows * sizeof *prs);
+
+    if (!prs)
+        goto failure;
+
+    for (unsigned i = 0; i < rows; i++)
+        *(prs + i) = (const struct row){0};
+
+    for (unsigned i = 0; i < rows; i++)
+    {
+        struct row *const p = &prs[i];
+        char *const c = malloc(columns);
+
+        if (!c)
+            goto failure;
+
+        p->columns = c;
+    }
+
+    p->first_row = p->last_row = p->proc_row = p->rows = prs;
+    p->nrows = rows;
+    p->ncolumns = columns;
+    return 0;
+
+failure:
+    for (unsigned i = 0; i < rows; i++)
+        free(prs[i].columns);
+
+    free(prs);
+    return -1;
+}
diff --git a/src/drv/tty/src/update.backup.c b/src/drv/tty/src/update.backup.c
new file mode 100644
index 0000000..d072977
--- /dev/null
+++ b/src/drv/tty/src/update.backup.c
@@ -0,0 +1,125 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/event.h>
+#include <drv/tty.h>
+#include <drv/tty/font.h>
+#include <drv/tty/ops.h>
+#include <drv/tty/types.h>
+#include <gfx/gfx.h>
+#include <gfx/sprite.h>
+#include <stdbool.h>
+
+static int init(struct drv_port *const p)
+{
+    if (p->init)
+        return 0;
+
+    const struct drv_event *const ev = &p->ev;
+    const struct drv_event_ops ops =
+    {
+        .write = drv_tty_write,
+        .args = p
+    };
+
+    if (ev->status("tty", &ops, true, 0666, ev->args))
+        return -1;
+
+    p->init = true;
+    return 0;
+}
+
+static short get_y(const struct drv_port *const p)
+{
+    const ptrdiff_t r = p->proc_row - p->first_row;
+
+    if (r >= 0)
+        return r * 16;
+
+    return (((p->rows + p->nrows) - p->first_row)
+        + (p->proc_row - p->rows)) * 16;
+}
+
+static int prepare(struct drv_port *const p)
+{
+    struct row *r = p->proc_row;
+
+    if (r == p->last_row)
+        return 0;
+    else if (!p->last_proc_column)
+    {
+        struct gfx_rect *const rect = gfx_rect_get();
+        const short y = get_y(p);
+
+        if (!rect)
+            return 0;
+
+        gfx_rect_init(rect);
+        rect->y = y;
+        rect->w = screen_w;
+        rect->h = 16;
+
+        if (gfx_rect_sort(rect))
+            return -1;
+    }
+
+    const char c = r->columns[p->last_proc_column];
+
+    if (c != ' ')
+    {
+        struct gfx_sprite *const s = gfx_sprite_get();
+
+        if (!s || gfx_sprite_clone(&ttyfont_spr, s))
+            return 0;
+
+        const short x = p->last_proc_column * 10, y = get_y(p);
+        const char ch = c - ' ';
+        const short u = (12 * ch) % ttyfont_spr.w;
+        const short v = 16 * ((12 * ch) / ttyfont_spr.w);
+
+        /* TODO: replace hardcoded values */
+        s->x = x;
+        s->y = y;
+        s->w = 12;
+        s->h = 16;
+        s->u += u;
+        s->v += v;
+
+        if (gfx_sprite_sort(s))
+            return -1;
+    }
+
+    if (++p->last_proc_column >= r->len)
+    {
+        if (++r - p->rows >= p->nrows)
+            r = p->rows;
+
+        p->last_proc_column = 0;
+    }
+
+    p->proc_row = r;
+    return 0;
+}
+
+int drv_tty_update(struct drv_port *const p)
+{
+    if (init(p) || prepare(p))
+        return -1;
+
+    return 0;
+}
diff --git a/src/drv/tty/src/update.c b/src/drv/tty/src/update.c
new file mode 100644
index 0000000..7c01678
--- /dev/null
+++ b/src/drv/tty/src/update.c
@@ -0,0 +1,126 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/event.h>
+#include <drv/tty.h>
+#include <drv/tty/font.h>
+#include <drv/tty/ops.h>
+#include <drv/tty/types.h>
+#include <gfx/gfx.h>
+#include <gfx/sprite.h>
+#include <stdbool.h>
+
+static int init(struct drv_port *const p)
+{
+    if (p->init)
+        return 0;
+
+    const struct drv_event *const ev = &p->ev;
+    const struct drv_event_ops ops =
+    {
+        .write = drv_tty_write,
+        .args = p
+    };
+
+    if (ev->status("tty", &ops, true, 0666, ev->args))
+        return -1;
+
+    p->init = true;
+    return 0;
+}
+
+static short get_y(const struct drv_port *const p)
+{
+    const ptrdiff_t r = p->proc_row - p->first_row;
+
+    if (r >= 0)
+        return r * 16;
+
+    return (((p->rows + p->nrows) - p->first_row)
+        + (p->proc_row - p->rows)) * 16;
+}
+
+static int prepare(struct drv_port *const p)
+{
+    struct row *r = p->proc_row;
+
+    if (r == p->last_row)
+        return 0;
+
+    struct gfx_rect *const rect = gfx_rect_get();
+    const short y = get_y(p);
+    short x = 0;
+
+    if (!rect)
+        return 0;
+
+    gfx_rect_init(rect);
+    rect->y = y;
+    rect->w = screen_w;
+    rect->h = 16;
+
+    if (gfx_rect_sort(rect))
+        return -1;
+
+    /* TODO: this is a trick to avoid having half-rendered lines. */
+    struct gfx_sprite *sprites[64];
+
+    for (size_t i = 0; i < sizeof sprites / sizeof *sprites; i++)
+        sprites[i] = gfx_sprite_get();
+
+    for (const char *c = r->columns;
+        *c && c - r->columns < p->ncolumns; c++, x += 10)
+    {
+        struct gfx_sprite *const s = sprites[c - r->columns];
+
+        if (*c == ' ')
+            continue;
+
+        const char ch = *c - ' ';
+        const short u = (12 * ch) % ttyfont_spr.w;
+        const short v = 16 * ((12 * ch) / ttyfont_spr.w);
+
+        if (!s || gfx_sprite_clone(&ttyfont_spr, s))
+            return 0;
+
+        /* TODO: replace hardcoded values */
+        s->x = x;
+        s->y = y;
+        s->w = 12;
+        s->h = 16;
+        s->u += u;
+        s->v += v;
+
+        if (gfx_sprite_sort(s))
+            return -1;
+    }
+
+    if (++r - p->rows >= p->nrows)
+        r = p->rows;
+
+    p->proc_row = r;
+    return 0;
+}
+
+int drv_tty_update(struct drv_port *const p)
+{
+    if (init(p) || prepare(p))
+        return -1;
+
+    return 0;
+}
diff --git a/src/drv/tty/src/write.c b/src/drv/tty/src/write.c
new file mode 100644
index 0000000..d4a988d
--- /dev/null
+++ b/src/drv/tty/src/write.c
@@ -0,0 +1,70 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/event.h>
+#include <drv/tty.h>
+#include <drv/tty/types.h>
+#include <drv/tty/ops.h>
+#include <errno.h>
+#include <stddef.h>
+
+int drv_tty_write(const void *const buf, const size_t n,
+    const struct drv_event_done *const d, void *const args)
+{
+    struct drv_port *const p = args;
+
+    for (const char *s = buf; s - (const char *)buf < n; s++)
+    {
+        struct row *const r = p->last_row;
+        char *const col = &r->columns[p->last_column];
+
+        if (*s == '\r')
+        {
+            *col = '\0';
+            p->last_column = r->len = 0;
+        }
+        else
+        {
+            if (*s != '\n')
+            {
+                *col = *s;
+                r->len++;
+            }
+            else
+                *col = '\0';
+
+            if (*s == '\n' || ++p->last_column >= p->ncolumns)
+            {
+                if (++p->last_row - p->rows >= p->nrows)
+                    p->last_row = p->rows;
+
+                if (p->last_row == p->first_row)
+                {
+                    if (++p->first_row - p->rows >= p->nrows)
+                        p->first_row = p->rows;
+
+                    p->proc_row = p->first_row;
+                }
+
+                p->last_column = 0;
+            }
+        }
+    }
+
+    return d->f(SUCCESS, d->args);
+}