Added long awaited CD-ROM library and loads of fixes, see changelog for details

30 files changed, 2236 insertions, 126 deletions

diff --git a/libpsn00b/include/hwregs_a.h b/libpsn00b/include/hwregs_a.h
index 27cfc88..9d4313b 100644
--- a/libpsn00b/include/hwregs_a.h
+++ b/libpsn00b/include/hwregs_a.h
@@ -82,6 +82,10 @@
 .set D2_BCR,	0x10a4
 .set D2_CHCR,	0x10a8
 
+.set D3_MADR,	0x10b0
+.set D3_BCR,	0x10b4
+.set D3_CHCR,	0x10b8
+
 .set D4_MADR,	0x10c0
 .set D4_BCR,	0x10c4
 .set D4_CHCR,	0x10c8
diff --git a/libpsn00b/include/psxapi.h b/libpsn00b/include/psxapi.h
index 9abcd0c..0953dc3 100644
--- a/libpsn00b/include/psxapi.h
+++ b/libpsn00b/include/psxapi.h
@@ -1,23 +1,38 @@
 #ifndef __PSXAPI__
 #define __PSXAPI__
 
-#define DescHW		0xf0000000
-#define DescSW		0xf4000000
-
-#define HwCARD		(DescHW|0x11)
-#define HwCARD_1	(DescHW|0x12)
-#define HwCARD_0	(DescHW|0x13)
-#define SwCARD		(DescHW|0x02)
-
-#define EvSpIOE		0x0004
-#define EvSpERROR	0x8000
-#define EvSpTIMOUT	0x0100
-#define EvSpNEW		0x0200
-
-#define EvMdINTR	0x1000
-#define EvMdNOINTR	0x2000
-
-typedef struct {			// Device control block
+#define DescHW			0xf0000000
+#define DescSW			0xf4000000
+
+#define HwCARD			(DescHW|0x11)
+#define HwCARD_1		(DescHW|0x12)
+#define HwCARD_0		(DescHW|0x13)
+#define SwCARD			(DescHW|0x02)
+
+#define EvSpIOE			0x0004
+#define EvSpERROR		0x8000
+#define EvSpTIMOUT		0x0100
+#define EvSpNEW			0x0200
+
+#define EvMdINTR		0x1000
+#define EvMdNOINTR		0x2000
+
+// Root counter (timer) definitions
+#define DescRC			0xf2000000
+
+#define RCntCNT0		(DescRC|0x00)
+#define RCntCNT1		(DescRC|0x01)
+#define RCntCNT2		(DescRC|0x02)
+#define RCntCNT3		(DescRC|0x03)
+
+#define RCntMdINTR		0x1000		// Turns on IRQ
+#define RCntMdNOINTR	0x2000		// Polling mode
+#define RCntMdSC		0x0001		// IRQ when counter target
+#define RCntMdSP		0x0000
+#define RCntMdFR		0x0000
+#define RCntMdGATE		0x0010
+
+typedef struct {					// Device control block
 	char	*name;
 	int		flags;
 	int		ssize;
@@ -121,6 +136,7 @@ int chdir(const char *path);
 int AddDev(DCB *dcb);
 int DelDev(const char *name);
 void ListDev(void);
+void AddDummyTty(void);
 
 void EnterCriticalSection(void);
 void ExitCriticalSection(void);
@@ -151,8 +167,14 @@ int _card_read(int chan, int sector, unsigned char *buf);
 int _card_write(int chan, int sector, unsigned char *buf);
 void _new_card(void);
 
+// Timers
+int SetRCnt(int spec, unsigned short target, int mode);
+int GetRCnt(int spec);
+int StartRCnt(int spec);
+int StopRCnt(int spec);
+int ResetRCnt(int spec);
 
-// Interrupt acknowledge control
+// BIOS IRQ acknowledge control
 void ChangeClearPAD(int mode);
 void ChangeClearRCnt(int t, int m);
 
diff --git a/libpsn00b/include/psxcd.h b/libpsn00b/include/psxcd.h
new file mode 100644
index 0000000..5bb1b5f
--- /dev/null
+++ b/libpsn00b/include/psxcd.h
@@ -0,0 +1,149 @@
+#ifndef _LIBPSXCD_H
+#define _LIBPSXCD_H
+
+#include <sys/types.h>
+
+/*
+ * CD-ROM control commands
+ */
+#define CdlNop				0x01	/* a.k.a. Getstat */
+#define CdlSetloc			0x02
+#define CdlPlay				0x03
+#define CdlForward			0x04
+#define CdlBackward			0x05
+#define CdlReadN			0x06
+#define CdlStandby			0x07	/* a.k.a. MotorOn */
+#define CdlStop				0x08
+#define CdlPause			0x09
+#define CdlInit				0x0A
+#define CdlMute				0x0B
+#define CdlDemute			0x0C
+#define CdlSetfilter		0x0D
+#define CdlSetmode			0x0E
+#define CdlGetparam			0x0F
+#define CdlGetlocL			0x10
+#define CdlGetlocP			0x11
+#define CdlSetsession		0x12	/* ORIGINAL CODE */
+#define CdlGetTN			0x13
+#define CdlGetTD			0x14
+#define CdlSeekL			0x15
+#define CdlSeekP			0x16
+#define CdlTest				0x19	/* ORIGINAL CODE */
+#define CdlReadS			0x1B
+
+/*
+ * CD-ROM status bits
+ */
+#define CdlStatError		0x01
+#define CdlStatStandby		0x02
+#define CdlStatSeekError	0x04
+#define CdlStatIdError		0x08	/* ORIGINAL CODE */
+#define CdlStatShellOpen	0x10
+#define CdlStatRead			0x20
+#define CdlStatSeek			0x40
+#define CdlStatPlay			0x80
+
+/*
+ * CD-ROM mode bits
+ */
+#define CdlModeDA			0x01
+#define CdlModeAP			0x02
+#define CdlModeRept			0x04
+#define CdlModeSF			0x08
+#define CdlModeSize0		0x10
+#define CdlModeSize1		0x20
+#define CdlModeRT			0x40
+#define CdlModeSpeed		0x80
+
+/*
+ * CD-ROM interrupt result values
+ */
+#define CdlNoIntr			0x00
+#define CdlDataReady		0x01
+#define CdlComplete			0x02
+#define CdlAcknowledge		0x03
+#define CdlDataEnd			0x04
+#define CdlDiskError		0x05
+
+#define btoi(b)		((b)/16*10+(b)%16)	/* Convert BCD value to integer */
+#define itob(i)		((i)/10*16+(i)%10)	/* Convert integer to BCD value */
+
+/*
+ * CD-ROM disc location struct
+ */
+typedef struct CdlLOC
+{
+	u_char	minute;
+	u_char	second;
+	u_char	sector;
+	u_char	track;
+} CdlLOC;
+
+/*
+ * CD-ROM audio attenuation struct (volume)
+ */
+typedef struct CdlATV
+{
+	u_char	val0;	/* L -> SPU L */
+	u_char	val1;	/* L -> SPU R */
+	u_char	val2;	/* R -> SPU R */
+	u_char	val3;	/* R -> SPU L */
+} CdlATV;
+
+/*
+ * CD-ROM file information struct
+ */
+typedef struct CdlFILE
+{
+	CdlLOC	loc;
+	u_int	size;
+	char	name[16];
+} CdlFILE;
+
+typedef struct CdlFILTER
+{
+	u_char	file;
+	u_char	chan;
+	u_short	pad;
+} CdlFILTER;
+
+/* Data callback */
+typedef void (*CdlCB)(int, unsigned char *);
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int CdInit(int mode);
+
+CdlLOC *CdIntToPos(int i, CdlLOC *p);
+int CdPosToInt(CdlLOC *p);
+int CdGetToc(CdlLOC *toc);
+
+int CdControl(unsigned char com, unsigned char *param, unsigned char *result);
+int CdControlB(unsigned char com, unsigned char *param, unsigned char *result);
+int CdControlF(unsigned char com, unsigned char *param);
+int CdSync(int mode, unsigned char *result);
+unsigned int CdSyncCallback(CdlCB func);
+
+long CdReadyCallback(CdlCB func);
+int CdGetSector(void *madr, int size);
+
+CdlFILE *CdSearchFile(CdlFILE *loc, const char *filename);
+int CdRead(int sectors, unsigned int *buf, int mode);
+int CdReadSync(int mode, unsigned char *result);
+unsigned int CdReadCallback(CdlCB func);
+
+int CdStatus(void);
+int CdMode(void);
+
+int CdMix(CdlATV *vol);
+
+/* ORIGINAL CODE */
+long *CdAutoPauseCallback(void(*func)());
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LIBPSXCD_H */
diff --git a/libpsn00b/include/psxgpu.h b/libpsn00b/include/psxgpu.h
index 230775f..5f0798a 100644
--- a/libpsn00b/include/psxgpu.h
+++ b/libpsn00b/include/psxgpu.h
@@ -114,9 +114,9 @@
 /*
  *	Primitive handling macros
  */
-#define setlen( p, _len )		( ((P_TAG*)(p))->len = (unsigned char)_len )
-#define setaddr( p, _addr )		( ((P_TAG*)(p))->addr = (unsigned int)_addr )
-#define setcode( p, _code )		( ((P_TAG*)(p))->code = (unsigned char)_code )
+#define setlen( p, _len )		( ((P_TAG*)(p))->len = (unsigned char)(_len) )
+#define setaddr( p, _addr )		( ((P_TAG*)(p))->addr = (unsigned int)(_addr) )
+#define setcode( p, _code )		( ((P_TAG*)(p))->code = (unsigned char)(_code) )
 
 #define getlen( p )				( ((P_TAG*)(p))->len )
 #define getaddr( p )			( ((P_TAG*)(p))->addr )
@@ -126,7 +126,7 @@
 #define isendprim( p )			((((P_TAG*)(p))->addr)==0xffffff)
 
 #define addPrim( ot, p )		setaddr( p, getaddr( ot ) ), setaddr( ot, p )
-#define addPrims(ot, p0, p1)	setaddr( p1, getaddr( ot ) ), setaddr( ot, p0 )
+#define addPrims( ot, p0, p1 )	setaddr( p1, getaddr( ot ) ), setaddr( ot, p0 )
 
 #define catPrim( p0, p1 )		setaddr( p0, p1 )
 #define termPrim( p )			setaddr( p, 0xffffff )
@@ -186,6 +186,22 @@
 			
 #define setFill( p ) 	setlen( p, 3 ), 	setcode( p, 0x02 )
 
+#define setDrawOffset( p, _x, _y ) \
+	setlen( p, 1 ), \
+	(p)->code[0] = (_x&0x3FF)|((_y&0x3FF)<<11), \
+	((char*)(p)->code)[3] = 0xE5
+	
+#define setDrawArea( p, r ) \
+	setlen( p, 2 ), \
+	(p)->code[0] = ((r)->x&0x3FF)|(((r)->y&0x1FF)<<10),	\
+	(p)->code[1] = (((r)->x+(r)->w-1)&0x3FF)|((((r)->y+(r)->h-1)&0x1FF)<<10), \
+	((char*)&(p)->code[0])[3] = 0xE3, \
+	((char*)&(p)->code[1])[3] = 0xE4
+
+#define setTexWindow( p, r ) \
+	setlen( p, 1 ), \
+	(p)->code[0] = ((r)->w&0x1F)|(((r)->h&0x1F)<<5)|(((r)->x&0x1F)<<10)|(((r)->y&0x1F)<<15), \
+	((char*)&(p)->code[0])[3] = 0xE2
 	
 /*
  *	Primitive definitions
@@ -427,34 +443,44 @@ typedef struct {
  *	VRAM fill and transfer primitive definitions
  */
 
-typedef struct {
+typedef struct DR_ENV {
 	unsigned int	tag;
 	unsigned int	code[15];
 } DR_ENV;
 
-typedef struct {
+typedef struct DR_AREA {
+	unsigned int	tag;
+	unsigned int	code[2];
+} DR_AREA;
+
+typedef struct DR_OFFSET {
+	unsigned int	tag;
+	unsigned int	code[1];
+} DR_OFFSET;
+
+typedef struct DR_TWIN {
 	unsigned int	tag;
 	unsigned int	code[2];
 } DR_TWIN;
 
-typedef struct {
+typedef struct DR_TPAGE {
 	unsigned int	tag;
 	unsigned int	code[1];
 } DR_TPAGE;
 
-typedef struct {	/* ORIGINAL */
+typedef struct DR_MASK {	/* ORIGINAL */
 	unsigned int	tag;
 	unsigned int	code[1];
 } DR_MASK;
 
-typedef struct {	/* ORIGINAL */
+typedef struct FILL {		/* ORIGINAL */
 	unsigned int	tag;
 	unsigned char	r0,g0,b0,code;
 	unsigned short	x0,y0;		// Note: coordinates must be in 16 pixel steps
 	unsigned short	w,h;
 } FILL;
 
-typedef struct {	/* ORIGINAL */
+typedef struct VRAM2VRAM {	/* ORIGINAL */
 	unsigned int	tag;
 	unsigned char	p0,p1,p2,code;
 	unsigned short	x0,y0;
@@ -465,18 +491,18 @@ typedef struct {	/* ORIGINAL */
 
 // General structs
 
-typedef struct {
+typedef struct RECT {
 	short x,y;
 	short w,h;
 } RECT;
 
-typedef struct {
+typedef struct DISPENV_RAW {
 	unsigned int vid_mode;		// Video mode
 	short vid_xpos,vid_ypos;	// Video position (not framebuffer)
 	short fb_x,fb_y;			// Framebuffer display position	
 } DISPENV_RAW;
 
-typedef struct {
+typedef struct DISPENV {
 	RECT	disp;
 	RECT	screen;
 	char	isinter;
@@ -485,7 +511,7 @@ typedef struct {
 	char	pad;
 } DISPENV;
 
-typedef struct {
+typedef struct DRAWENV {
 	RECT			clip;		// Drawing area
 	short			ofs[2];		// GPU draw offset (relative to draw area)
 	RECT			tw;			// Texture window (doesn't do anything atm)
@@ -497,7 +523,7 @@ typedef struct {
 	DR_ENV			dr_env;		// Draw mode packet area (used by PutDrawEnv)
 } DRAWENV;
 
-typedef struct {
+typedef struct TIM_IMAGE {
 	unsigned int mode;
 	RECT *crect;
 	unsigned int *caddr;
diff --git a/libpsn00b/include/psxsio.h b/libpsn00b/include/psxsio.h
index df218ac..3f571d7 100644
--- a/libpsn00b/include/psxsio.h
+++ b/libpsn00b/include/psxsio.h
@@ -58,9 +58,10 @@ void *Sio1Callback(void (*func)(void));
 
 // ORIGINAL
 void WaitSIO(void);
+int kbhit();
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif
\ No newline at end of file
+#endif
diff --git a/libpsn00b/include/string.h b/libpsn00b/include/string.h
index 9cd1d64..365d238 100644
--- a/libpsn00b/include/string.h
+++ b/libpsn00b/include/string.h
@@ -29,8 +29,8 @@ char *strncat(char *s , const char *append, int n);
 char *strcpy(char *dst , const char *src);
 char *strncpy(char *dst , const char *src , int n);
 int strlen(const char *s);
-//char *strchr(const char *s , int c);
-//char *strrchr(const char *s , int c);
+char *strchr(const char *s , int c);
+char *strrchr(const char *s , int c);
 
 void *memmove(void *dst , const void *src , int n);
 void *memchr(void *s , int c , int n);
diff --git a/libpsn00b/libc/readme.txt b/libpsn00b/libc/readme.txt
index 064a353..5bef0fd 100644
--- a/libpsn00b/libc/readme.txt
+++ b/libpsn00b/libc/readme.txt
@@ -32,12 +32,6 @@ Library header(s):
 	
 
 Todo list:
-
-	* Current vsprintf/sprintf implementation from PSXSDK needs to be replaced
-	  as it performs quite slow likely due to the unnecessary int64 arithmetic
-	  performed on any integer value which the compiler has to emulate on the
-	  R3000. A more efficient implementation that only uses int32 is much
-	  preferred.
 	  
 	* Many of the string manipulation and memory fill functions in string.c
 	  are yet to be replaced with more efficient assembly implementations.
diff --git a/libpsn00b/libc/string.c b/libpsn00b/libc/string.c
index a14d950..0b7307d 100644
--- a/libpsn00b/libc/string.c
+++ b/libpsn00b/libc/string.c
@@ -43,7 +43,7 @@ char *strncpy(char *dst, const char *src, int len)
 		len--;
 	}
 	
-	if(len)*dst = 0;
+	*dst = 0;
 	
 	return odst;
 }
@@ -139,13 +139,13 @@ char *strstr(const char *big, const char *little)
 
 int strcmp(const char *s1, const char *s2)
 {
-	while(*s1 && *s2 && (*s1 == *s2))
+	while((*s1) && (*s2) && (*s1 == *s2))
 	{
 		s1++;
 		s2++;
 	}
 
-	return *s1-*s2;
+	return(*s1-*s2);
 }
 
 int strncmp(const char *s1, const char *s2, int len)
diff --git a/libpsn00b/libpsxcd/_cd_control.s b/libpsn00b/libpsxcd/_cd_control.s
new file mode 100644
index 0000000..7f69266
--- /dev/null
+++ b/libpsn00b/libpsxcd/_cd_control.s
@@ -0,0 +1,109 @@
+.set noreorder
+
+.include "hwregs_a.h"
+
+.section .text
+
+#
+# Issues command and parameter bytes to CD controller directly
+#
+.global _cd_control
+.type _cd_control, @function
+_cd_control:
+
+	# a0 - command value
+	# a1 - pointer to parameters
+	# a2 - length of parameters
+	
+	li		$v0, 1					# Set acknowledge wait flag
+	la		$v1, _cd_ack_wait
+	sb		$v0, 0($v1)
+	
+	# Commands that have a 'completion' interrupt (CDIRQ2)
+	
+	beq		$a0, 0x07, .Lset_complete	# CdlStandby
+	nop
+	beq		$a0, 0x08, .Lset_complete	# CdlStop
+	nop
+	beq		$a0, 0x09, .Lset_complete	# CdlPause
+	nop
+	beq		$a0, 0x0A, .Lset_complete	# CdlInit
+	nop
+	beq		$a0, 0x12, .Lset_complete	# CdlSetsession
+	nop
+	beq		$a0, 0x15, .Lset_complete	# CdlSeekL
+	nop
+	beq		$a0, 0x16, .Lset_complete	# CdlSeekP
+	nop
+	beq		$a0, 0x1A, .Lset_complete	# GetID
+	nop
+	beq		$a0, 0x1D, .Lset_complete	# GetQ
+	nop
+	
+	la		$v1, _cd_complt_wait	# Set wait complete flag
+	sb		$0 , 0($v1)
+	
+	b		.Lno_complete
+	nop
+	
+.Lset_complete:
+
+	la		$v1, _cd_complt_wait	# Set wait complete flag
+	sb		$v0, 0($v1)
+	
+.Lno_complete:
+	
+	bne		$a0, 0x0E, .Lnot_mode
+	lbu		$v0, 0($a1)
+	la		$v1, _cd_last_mode
+	sb		$v0, 0($v1)
+	
+.Lnot_mode:
+	
+	la		$v1, _cd_last_int		# Clear last IRQ value
+	sb		$0 , 0($v1)
+
+	la		$v1, _cd_last_cmd		# Save command as last command
+	sb		$a0, 0($v1)
+	
+	lui		$v1, IOBASE
+	
+.Lbusy_wait:
+	lbu		$v0, CD_REG0($v1)
+	nop
+	andi	$v0, 0x80
+	bnez	$v0, .Lbusy_wait
+	nop
+	
+	li		$v0, 1					# Clear parameter FIFO (in case it wasn't cleared)
+	sb		$v0, CD_REG0($v1)
+	li		$v0, 0x40
+	sb		$v0, CD_REG3($v1)
+	
+.Lcmd_wait:							# Wait for CD to become ready for commands
+	lbu		$v0, CD_REG0($v1)
+	nop
+	andi	$v0, 0x80
+	bnez	$v0, .Lcmd_wait
+	nop
+	
+	sb		$0 , CD_REG0($v1)
+	
+	beqz	$a2, .Lno_params
+	nop
+	
+.Lfeed_params:						# Feed parameters to parameter FIFO
+	lbu		$v0, 0($a1)
+	addi	$a2, -1
+	sb		$v0, CD_REG2($v1)
+	bgtz	$a2, .Lfeed_params
+	addiu	$a1, 1
+	
+.Lno_params:
+
+	sb		$0 , CD_REG0($v1)		# Feed command value
+	sb		$a0, CD_REG1($v1)
+	
+	jr		$ra
+	nop
+	
\ No newline at end of file
diff --git a/libpsn00b/libpsxcd/cdgetsector.s b/libpsn00b/libpsxcd/cdgetsector.s
new file mode 100644
index 0000000..70039bf
--- /dev/null
+++ b/libpsn00b/libpsxcd/cdgetsector.s
@@ -0,0 +1,53 @@
+.set noreorder
+
+.include "hwregs_a.h"
+
+.section .text
+
+.global CdGetSector
+.type CdGetSector, @function
+CdGetSector:
+	
+	lui		$a2, IOBASE
+	
+.Lwait_fifo:
+	lbu		$v0, CD_REG0($a2)
+	nop
+	andi	$v0, 0x40
+	beqz	$v0, .Lwait_fifo
+	nop
+
+	lui		$v0, 0x1
+	srl		$a1, 2
+	or		$v0, $a1
+	sw		$a0, D3_MADR($a2)	# Set DMA base address and transfer length
+	sw		$v0, D3_BCR($a2)
+
+	lui		$v0, 0x1100			# Start DMA transfer
+	sw		$v0, D3_CHCR($a2)
+	nop
+	nop
+.Ldma_wait:
+	lw		$v0, D3_CHCR($a2)
+	nop
+	srl		$v0, 24
+	andi	$v0, 0x1
+	bnez	$v0, .Ldma_wait
+	nop
+	
+# Not stable
+#	sb		$0 , CD_REG0($a2)
+#.Lflush_fifo:					# Read out any remaining bytes in the buffer
+#	lbu		$v1, CD_REG0($a2)
+#	li		$v0, 0x40
+#	and		$v1, $v0
+#	beqz	$v1, .Lend_flush
+#	nop
+#	lbu		$v0, CD_REG2($a2)
+#	b		.Lflush_fifo
+#	nop
+#.Lend_flush:
+	
+	jr		$ra
+	li		$v0, 1
+	
diff --git a/libpsn00b/libpsxcd/cdmix.s b/libpsn00b/libpsxcd/cdmix.s
new file mode 100644
index 0000000..745fb65
--- /dev/null
+++ b/libpsn00b/libpsxcd/cdmix.s
@@ -0,0 +1,34 @@
+.set noreorder
+
+.include "hwregs_a.h"
+
+.section .text
+
+
+.global CdMix
+.type CdMix, @function
+CdMix:
+
+	lui		$a3, IOBASE
+	
+	lbu		$t0, 0($a0)
+	lbu		$t1, 1($a0)
+	lbu		$t2, 2($a0)
+	lbu		$t3, 3($a0)
+	
+	li		$v0, 2
+	sb		$v0, CD_REG0($a3)
+	sb		$t0, CD_REG2($a3)
+	sb		$t1, CD_REG3($a3)
+	
+	li		$v0, 3
+	sb		$v0, CD_REG0($a3)
+	sb		$t2, CD_REG1($a3)
+	sb		$t3, CD_REG2($a3)
+	
+	li		$v0, 0x20
+	sb		$v0, CD_REG3($a3)
+	
+	jr		$ra
+	li		$v0, 1
+	
\ No newline at end of file
diff --git a/libpsn00b/libpsxcd/cdsearchfile.c b/libpsn00b/libpsxcd/cdsearchfile.c
new file mode 100644
index 0000000..60e4377
--- /dev/null
+++ b/libpsn00b/libpsxcd/cdsearchfile.c
@@ -0,0 +1,663 @@
+#include <stdio.h>
+#include <malloc.h>
+#include <string.h>
+#include <psxgpu.h>
+#include <psxsio.h>
+#include "psxcd.h"
+
+// Uncommend to enable debug output
+//#define DEBUG
+
+#pragma pack(push, 1)
+
+/// Structure of a double-endian unsigned short word
+typedef struct ISO_USHORT_PAIR
+{
+	unsigned short	lsb;	/// LSB format 16-bit word
+	unsigned short	msb;	/// MSB format 16-bit word
+} ISO_USHORT_PAIR;
+
+/// Structure of a double-endian unsigned int word
+typedef struct ISO_UINT_PAIR
+{
+	unsigned int	lsb;		/// LSB format 32-bit word
+	unsigned int	msb;		/// MSB format 32-bit word
+} ISO_UINT_PAIR;
+
+/// ISO descriptor header structure
+typedef struct ISO_DESCRIPTOR_HEADER
+{
+	unsigned char	type;		/// Volume descriptor type (1 is descriptor, 255 is descriptor terminator)
+	char			id[5];		/// Volume descriptor ID (always CD001)
+	unsigned short	version;	/// Volume descriptor version (always 0x01)
+} ISO_DESCRIPTOR_HEADER;
+
+/// Structure of a date stamp for ISO_DIR_ENTRY structure
+typedef struct ISO_DATESTAMP
+{
+	unsigned char	year;		/// number of years since 1900
+	unsigned char	month;		/// month, where 1=January, 2=February, etc.
+	unsigned char	day;		/// day of month, in the range from 1 to 31
+	unsigned char	hour;		/// hour, in the range from 0 to 23
+	unsigned char	minute;		/// minute, in the range from 0 to 59
+	unsigned char	second;		/// Second, in the range from 0 to 59
+	unsigned char	GMToffs;	/// Greenwich Mean Time offset
+} ISO_DATESTAMP;
+
+/// Structure of an ISO path table entry (specifically for the cd::IsoReader class)
+typedef struct ISO_PATHTABLE_ENTRY
+{
+	unsigned char nameLength;	/// Name length (or 1 for the root directory)
+	unsigned char extLength;	/// Number of sectors in extended attribute record
+	unsigned int dirOffs;		/// Number of the first sector in the directory, as a double word
+	unsigned short dirLevel;	/// Index of the directory record's parent directory
+								/// If nameLength is odd numbered, a padding byte will be present after the identifier text.
+} ISO_PATHTABLE_ENTRY;
+
+typedef struct ISO_DIR_ENTRY
+{
+	unsigned char entryLength;			// Directory entry length (variable, use for parsing through entries)
+	unsigned char extLength;			// Extended entry data length (always 0)
+	ISO_UINT_PAIR entryOffs;			// Points to the LBA of the file/directory entry
+	ISO_UINT_PAIR entrySize;			// Size of the file/directory entry
+	ISO_DATESTAMP entryDate;			// Date & time stamp of entry
+	unsigned char flags;				// File flags (0x02 for directories, 0x00 for files)
+	unsigned char fileUnitSize;			// Unit size (usually 0 even with Form 2 files such as STR/XA)
+	unsigned char interleaveGapSize;	// Interleave gap size (usually 0 even with Form 2 files such as STR/XA)
+	ISO_USHORT_PAIR volSeqNum;			// Volume sequence number (always 1)
+	unsigned char identifierLen;		// Identifier (file/directory name) length in bytes
+} ISO_DIR_ENTRY;
+
+typedef struct ISO_ROOTDIR_HEADER
+{
+	unsigned char entryLength;			// Always 34 bytes
+	unsigned char extLength;			// Always 0
+	ISO_UINT_PAIR entryOffs;			// Should point to LBA 22
+	ISO_UINT_PAIR entrySize;			// Size of entry extent
+	ISO_DATESTAMP entryDate;			// Record date and time
+	unsigned char flags;				// File flags
+	unsigned char fileUnitSize;
+	unsigned char interleaveGapSize;
+	ISO_USHORT_PAIR volSeqNum;
+	unsigned char identifierLen;		// 0x01
+	unsigned char identifier;			// 0x00
+} ISO_ROOTDIR_HEADER;
+
+// ISO descriptor structure
+typedef struct ISO_DESCRIPTOR
+{
+
+	// ISO descriptor header
+	ISO_DESCRIPTOR_HEADER header;
+	// System ID (always PLAYSTATION)
+	char systemID[32];
+	// Volume ID (or label, can be blank or anything)
+	char volumeID[32];
+	// Unused null bytes
+	unsigned char pad2[8];
+	// Size of volume in sector units
+	ISO_UINT_PAIR volumeSize;
+	// Unused null bytes
+	unsigned char pad3[32];
+	// Number of discs in this volume set (always 1 for single volume)
+	ISO_USHORT_PAIR volumeSetSize;
+	// Number of this disc in volume set (always 1 for single volume)
+	ISO_USHORT_PAIR volumeSeqNumber;
+	// Size of sector in bytes (always 2048 bytes)
+	ISO_USHORT_PAIR sectorSize;
+	// Path table size in bytes (applies to all the path tables)
+	ISO_UINT_PAIR pathTableSize;
+	// LBA to Type-L path table
+	unsigned int	pathTable1Offs;
+	// LBA to optional Type-L path table (usually a copy of the primary path table)
+	unsigned int	pathTable2Offs;
+	// LBA to Type-L path table but with MSB format values
+	unsigned int	pathTable1MSBoffs;
+	// LBA to optional Type-L path table but with MSB format values (usually a copy of the main path table)
+	unsigned int	pathTable2MSBoffs;
+	// Directory entry for the root directory (similar to a directory entry)
+	ISO_ROOTDIR_HEADER	rootDirRecord;
+	// Volume set identifier (can be blank or anything)
+	char	volumeSetIdentifier[128];
+	// Publisher identifier (can be blank or anything)
+	char	publisherIdentifier[128];
+	// Data preparer identifier (can be blank or anything)
+	char	dataPreparerIdentifier[128];
+	// Application identifier (always PLAYSTATION)
+	char	applicationIdentifier[128];
+	// Copyright file in the file system identifier (can be blank or anything)
+	char	copyrightFileIdentifier[37];
+	// Abstract file in the file system identifier (can be blank or anything)
+	char	abstractFileIdentifier[37];
+	// Bibliographical file identifier in the file system (can be blank or anything)
+	char	bibliographicFilelIdentifier[37];
+	// Volume create date (in text format YYYYMMDDHHMMSSMMGG)
+	char	volumeCreateDate[17];
+	// Volume modify date (in text format YYYYMMDDHHMMSSMMGG)
+	char	volumeModifyDate[17];
+	// Volume expiry date (in text format YYYYMMDDHHMMSSMMGG)
+	char	volumeExpiryDate[17];
+	// Volume effective date (in text format YYYYMMDDHHMMSSMMGG)
+	char	volumeEffeciveDate[17];
+	// File structure version (always 1)
+	unsigned char	fileStructVersion;
+	// Padding
+	unsigned char	dummy0;
+	// Application specific data (says CD-XA001 at [141], the rest are null bytes)
+	unsigned char	appData[512];
+	// Padding
+	unsigned char	pad4[653];
+
+} ISO_DESCRIPTOR;
+
+// Leave non-aligned structure packing
+#pragma pack(pop)
+
+extern char _cd_media_changed;
+int _cd_iso_last_dir_lba;
+
+u_char _cd_iso_descriptor_buff[2048];
+u_char *_cd_iso_pathtable_buff=NULL;
+u_char *_cd_iso_directory_buff=NULL;
+int _cd_iso_directory_len;
+
+int _CdReadIsoDescriptor(int session_offs)
+{
+	int i;
+	CdlLOC loc;
+	ISO_DESCRIPTOR *descriptor;
+	
+	// Seek to volume descriptor location
+	CdIntToPos(16+session_offs, &loc);
+	if( !CdControl(CdlSetloc, (u_char*)&loc, 0) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Could not set seek destination.\n");
+#endif
+		return -1;
+	}
+	
+	// Read volume descriptor
+	CdRead(1, (u_int*)_cd_iso_descriptor_buff, CdlModeSpeed);
+	if( CdReadSync(0, 0) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Error reading ISO volume descriptor.\n");
+#endif
+		return -1;
+	}
+	
+	
+	// Verify if volume descriptor is present
+	descriptor = (ISO_DESCRIPTOR*)_cd_iso_descriptor_buff;
+	if( strncmp("CD001", descriptor->header.id, 5) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Disc does not have a ISO9660 file system.\n");
+#endif
+		return -1;
+	}
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Path table LBA = %d\n", descriptor->pathTable1Offs);
+	printf("psxcd_dbg: Path table len = %d\n", descriptor->pathTableSize.lsb);
+#endif
+	
+	// Allocate path table buffer
+	i = ((2047+descriptor->pathTableSize.lsb)>>11)<<11;
+	if( _cd_iso_pathtable_buff )
+	{
+		free(_cd_iso_pathtable_buff);
+	}
+	_cd_iso_pathtable_buff = (u_char*)malloc(i);
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Allocated %d bytes for path table.\n", i);
+#endif
+	
+	// Read path table
+	CdIntToPos(descriptor->pathTable1Offs, &loc);
+	CdControl(CdlSetloc, (u_char*)&loc, 0);
+	CdRead(i>>11, (u_int*)_cd_iso_pathtable_buff, CdlModeSpeed);
+	if( CdReadSync(0, 0) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Error reading ISO path table.\n");
+#endif
+		return -1;
+	}
+	
+	_cd_iso_last_dir_lba = 0;
+	
+	return 0;
+}
+
+int _CdReadIsoDirectory(int lba)
+{
+	int i;
+	CdlLOC loc;
+	ISO_DIR_ENTRY *direntry;
+	
+	if( lba == _cd_iso_last_dir_lba )
+	{
+		return 0;
+	}
+	
+	CdIntToPos(lba, &loc);
+	i = CdPosToInt(&loc);
+#ifdef DEBUG
+	printf("psxcd_dbg: Seek to sector %d\n", i);
+#endif
+	if( !CdControl(CdlSetloc, (u_char*)&loc, 0) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Could not set seek destination.\n");
+#endif
+		return -1;
+	}
+	
+	if( _cd_iso_directory_buff )
+	{
+		free(_cd_iso_directory_buff);
+	}
+	
+	// Read first sector of directory record
+	_cd_iso_directory_buff = (u_char*)malloc(2048);
+	CdRead(1, (u_int*)_cd_iso_directory_buff, CdlModeSpeed);
+	if( CdReadSync(0, 0) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Error reading initial directory record.\n");
+#endif
+		return -1;
+	}
+	
+	direntry = (ISO_DIR_ENTRY*)_cd_iso_directory_buff;
+	_cd_iso_directory_len = direntry->entrySize.lsb;
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Location of directory record = %d\n", direntry->entryOffs.lsb);
+	printf("psxcd_dbg: Size of directory record = %d\n", _cd_iso_directory_len);
+#endif
+
+	if( _cd_iso_directory_len > 2048 )
+	{
+		if( !CdControl(CdlSetloc, (u_char*)&loc, 0) )
+		{
+#ifdef DEBUG
+			printf("psxcd: Could not set seek destination.\n");
+#endif
+			return -1;
+		}
+	
+		free(_cd_iso_directory_buff);
+		i = ((2047+_cd_iso_directory_len)>>11)<<11;
+		_cd_iso_directory_buff = (u_char*)malloc(i);
+#ifdef DEBUG
+		printf("psxcd_dbg: Allocated %d bytes for directory record.\n", i);
+#endif
+
+		CdRead(i>>11, (u_int*)_cd_iso_directory_buff, CdlModeSpeed);
+		if( CdReadSync(0, 0) )
+		{
+#ifdef DEBUG
+			printf("psxcd: Error reading initial directory record.\n");
+#endif
+			return -1;
+		}
+	}
+	
+	_cd_iso_last_dir_lba = lba;
+	
+	return 0;
+}
+
+#ifdef DEBUG
+
+void dump_directory(void)
+{
+	int i;
+	int dir_pos;
+	ISO_DIR_ENTRY *dir_entry;
+	char namebuff[16];
+	
+	printf("psxcd_dbg: Cached directory record contents:\n");
+	
+	i = 0;
+	dir_pos = 0;
+	while(1)
+	{
+		dir_entry = (ISO_DIR_ENTRY*)(_cd_iso_directory_buff+dir_pos);
+		
+		strncpy(namebuff, 
+			_cd_iso_directory_buff+dir_pos+sizeof(ISO_DIR_ENTRY), dir_entry->identifierLen);
+			
+		printf("P:%d L:%d %s\n", dir_pos, dir_entry->identifierLen, namebuff);
+		
+		dir_pos += dir_entry->entryLength;
+		i++;
+		
+		// Check if padding is reached (end of record sector)
+		if( _cd_iso_directory_buff[dir_pos] == 0 )
+		{
+			// Snap it to next sector
+			dir_pos = ((dir_pos+2047)>>11)<<11;
+			
+			// Break if exceeds length of directory buffer (end)
+			if( dir_pos >= _cd_iso_directory_len )
+			{
+				break;
+			}
+		}
+	}
+	
+	printf("--\n");
+	
+}
+
+void dump_pathtable(void)
+{
+	u_char *tbl_pos;
+	ISO_PATHTABLE_ENTRY *tbl_entry;
+	ISO_DESCRIPTOR *descriptor;
+	char namebuff[16];
+	
+	printf("psxcd_dbg: Path table entries:\n");
+	
+	descriptor = (ISO_DESCRIPTOR*)_cd_iso_descriptor_buff;
+	
+	tbl_pos = _cd_iso_pathtable_buff;
+	tbl_entry = (ISO_PATHTABLE_ENTRY*)tbl_pos;
+	
+	while( (int)(tbl_pos-_cd_iso_pathtable_buff) <
+		descriptor->pathTableSize.lsb )
+	{
+		strncpy(namebuff, 
+			tbl_pos+sizeof(ISO_PATHTABLE_ENTRY), 
+			tbl_entry->nameLength);
+		
+		printf("psxcd_dbg: %s\n", namebuff);
+		
+		// Advance to next entry
+		tbl_pos += sizeof(ISO_PATHTABLE_ENTRY)
+			+(2*((tbl_entry->nameLength+1)/2));
+			
+		tbl_entry = (ISO_PATHTABLE_ENTRY*)tbl_pos;
+	}
+	
+}
+
+#endif
+
+int get_pathtable_entry(int entry, ISO_PATHTABLE_ENTRY *tbl, char *namebuff)
+{
+	int i;
+	u_char *tbl_pos;
+	ISO_PATHTABLE_ENTRY *tbl_entry;
+	ISO_DESCRIPTOR *descriptor;
+	
+	descriptor = (ISO_DESCRIPTOR*)_cd_iso_descriptor_buff;
+	
+	tbl_pos = _cd_iso_pathtable_buff;
+	tbl_entry = (ISO_PATHTABLE_ENTRY*)tbl_pos;
+	
+	i = 0;
+	while( (int)(tbl_pos-_cd_iso_pathtable_buff) <
+		descriptor->pathTableSize.lsb )
+	{
+		if( i == (entry-1) )
+		{
+			if( namebuff )
+			{
+				strncpy(namebuff, 
+					tbl_pos+sizeof(ISO_PATHTABLE_ENTRY), 
+					tbl_entry->nameLength);
+			}
+			
+			if( tbl )
+			{
+				*tbl = *tbl_entry;
+			}
+			
+			return 0;
+		}
+		
+		// Advance to next entry
+		tbl_pos += sizeof(ISO_PATHTABLE_ENTRY)
+			+(2*((tbl_entry->nameLength+1)/2));
+			
+		tbl_entry = (ISO_PATHTABLE_ENTRY*)tbl_pos;
+		i++;
+	}
+	
+	if( entry <= 0 )
+	{
+		return i+1;
+	}
+	
+	return -1;
+}
+
+char *resolve_pathtable_path(int entry, char *rbuff)
+{
+	char namebuff[16];
+	ISO_PATHTABLE_ENTRY tbl_entry;
+	
+	*rbuff = 0;
+	
+	do
+	{
+		if( get_pathtable_entry(entry, &tbl_entry, namebuff) )
+		{
+			return NULL;
+		}
+		
+		rbuff -= tbl_entry.nameLength;
+		memcpy(rbuff, namebuff, tbl_entry.nameLength);
+		rbuff--;
+		*rbuff = '\\';
+	
+		// Parse to the parent
+		entry = tbl_entry.dirLevel;
+	
+	} while( entry > 1 );
+	
+	return rbuff;
+}
+
+int find_dir_entry(const char *name, ISO_DIR_ENTRY *dirent)
+{
+	int i;
+	int dir_pos;
+	ISO_DIR_ENTRY *dir_entry;
+	char namebuff[16];
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Locating file %s.\n", name);
+#endif
+
+	i = 0;
+	dir_pos = 0;
+	while(dir_pos < _cd_iso_directory_len)
+	{
+		dir_entry = (ISO_DIR_ENTRY*)(_cd_iso_directory_buff+dir_pos);
+		
+		if( !(dir_entry->flags & 0x2) )
+		{
+			strncpy(namebuff, 
+				_cd_iso_directory_buff+dir_pos+sizeof(ISO_DIR_ENTRY), 
+				dir_entry->identifierLen);
+				
+			if( strcmp(namebuff, name) == 0 )
+			{
+				*dirent = *dir_entry;
+				return 0;
+			}
+		}
+		
+		dir_pos += dir_entry->entryLength;
+		i++;
+		
+		// Check if padding is reached (end of record sector)
+		if( _cd_iso_directory_buff[dir_pos] == 0 )
+		{
+			// Snap it to next sector
+			dir_pos = ((dir_pos+2047)>>11)<<11;
+			
+		}
+	}
+	
+	return -1;
+}
+
+char *get_pathname(char *path, const char *filename)
+{
+	char *c;
+	c = strrchr(filename, '\\');
+	
+	if(( c == filename ) || ( !c ))
+	{
+		path[0] = '\\';
+		path[1] = 0;
+		return NULL;
+	}
+	
+	strncpy(path, filename, (int)(c-filename));
+	return path;
+}
+
+char *get_filename(char *name, const char *filename)
+{
+	char *c;
+	c = strrchr(filename, '\\');
+	
+	if(( c == filename ) || ( !c ))
+	{
+		strcpy(name, filename+1);
+		return name;
+	}
+	
+	c++;
+	strcpy(name, c);
+	return name;
+}
+
+CdlFILE *CdSearchFile(CdlFILE *fp, const char *filename)
+{
+	int i,j,found_dir,num_dirs;
+	int dir_len;
+	char tpath_rbuff[128];
+	char search_path[128];
+	char *rbuff;
+	ISO_PATHTABLE_ENTRY tbl_entry;
+	ISO_DIR_ENTRY dir_entry;
+	
+	// Read ISO descriptor if changed flag is set
+	if( _cd_media_changed )
+	{
+		// Read ISO descriptor and path table
+		if( _CdReadIsoDescriptor(0) )
+		{
+#ifdef DEBUG
+			printf("psxcd: Could not read ISO file system.\n");
+#endif
+			return NULL;
+		}
+#ifdef DEBUG
+		printf("psxcd: ISO file system cache updated.\n");
+#endif
+		_cd_media_changed = 0;
+	}
+	
+	// Get number of directories in path table
+	num_dirs = get_pathtable_entry(0, NULL, NULL);
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Directories in path table: %d\n", num_dirs);
+	
+	rbuff = resolve_pathtable_path(num_dirs-1, tpath_rbuff+127);
+
+	if( !rbuff )
+	{
+		printf("psxcd_dbg: Could not resolve path.\n");
+	}
+	else
+	{
+		printf("psxcd_dbg: Longest path: %s|\n", rbuff);
+	}
+#endif
+	
+	if( get_pathname(search_path, filename) )
+	{
+#ifdef DEBUG
+		printf("psxcd_dbg: Search path = %s|\n", search_path);
+#endif
+	}
+	
+	// Search the pathtable for a matching path
+	found_dir = 0;
+	for(i=1; i<num_dirs; i++)
+	{
+		rbuff = resolve_pathtable_path(i, tpath_rbuff+127);
+#ifdef DEBUG
+		printf("psxcd_dbg: Found = %s|\n", rbuff);
+#endif
+		if( rbuff )
+		{
+			if( strcmp(search_path, rbuff) == 0 )
+			{
+				found_dir = i;
+				break;
+			}
+		}
+	}
+	
+	if( !found_dir )
+	{
+#ifdef DEBUG
+		printf("psxcd_dbg: Directory path not found.\n");
+#endif
+		return NULL;
+	}
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Found directory at record %d!\n", found_dir);
+#endif
+
+	get_pathtable_entry(found_dir, &tbl_entry, NULL);
+
+#ifdef DEBUG	
+	printf("psxcd_dbg: Directory LBA = %d\n", tbl_entry.dirOffs);
+#endif
+
+	_CdReadIsoDirectory(tbl_entry.dirOffs);
+	
+	get_filename(fp->name, filename);
+	
+	// Add version number if not specified
+	if( !strchr(fp->name, ';') )
+	{
+		strcat(fp->name, ";1");
+	}
+	
+#ifdef DEBUG
+	dump_directory();
+#endif
+	
+	if( find_dir_entry(fp->name, &dir_entry) )
+	{
+#ifdef DEBUG
+		printf("psxcd: Could not find file.\n");
+#endif
+		return NULL;
+	}
+	
+#ifdef DEBUG
+	printf("psxcd_dbg: Located file at LBA %d.\n", dir_entry.entryOffs.lsb);
+#endif
+
+	CdIntToPos(dir_entry.entryOffs.lsb, &fp->loc);
+	fp->size = dir_entry.entrySize.lsb;
+	
+	return fp;
+}
diff --git a/libpsn00b/libpsxcd/makefile b/libpsn00b/libpsxcd/makefile
new file mode 100644
index 0000000..87466b3
--- /dev/null
+++ b/libpsn00b/libpsxcd/makefile
@@ -0,0 +1,38 @@
+# Run using make (Linux) or gmake (BSD)
+# Part of the PSn00bSDK Project
+# 2019 Lameguy64 / Meido-Tek Productions
+
+include ../common.mk
+
+TARGET	= ../libpsxcd.a
+
+CFILES	= $(notdir $(wildcard ./*.c))
+AFILES	= $(notdir $(wildcard ./*.s))
+OFILES	= $(addprefix build/,$(CFILES:.c=.o) $(AFILES:.s=.o))
+
+INCLUDE = -I../include
+
+CFLAGS	= -g -msoft-float -fno-builtin -fdata-sections -ffunction-sections -Wa,--strip-local-absolute 
+AFLAGS	= -g -msoft-float -Wa,--strip-local-absolute
+
+CC		= $(PREFIX)gcc
+AS		= $(PREFIX)as
+AR		= $(PREFIX)ar
+RANLIB	= $(PREFIX)ranlib
+
+all: $(TARGET)
+
+$(TARGET): $(OFILES)
+	$(AR) cr $(TARGET) $(OFILES)
+	$(RANLIB) $(TARGET)
+
+build/%.o: %.c
+	@mkdir -p $(dir $@)
+	$(CC) -O2 $(CFLAGS) $(INCLUDE) -c $< -o $@
+	
+build/%.o: %.s
+	@mkdir -p $(dir $@)
+	$(CC) $(AFLAGS) $(INCLUDE) -c $< -o $@
+
+clean:
+	rm -Rf build $(TARGET)
diff --git a/libpsn00b/libpsxcd/psxcd.c b/libpsn00b/libpsxcd/psxcd.c
new file mode 100644
index 0000000..5be9eec
--- /dev/null
+++ b/libpsn00b/libpsxcd/psxcd.c
@@ -0,0 +1,319 @@
+#include <stdio.h>
+#include "psxcd.h"
+
+extern volatile char _cd_ack_wait;
+extern volatile unsigned char _cd_last_int;
+extern volatile unsigned char _cd_last_mode;
+extern volatile unsigned char _cd_status;
+extern volatile CdlCB _cd_callback_int1_data;
+volatile unsigned char *_cd_result_ptr;
+
+extern volatile char _cd_media_changed;
+
+void _cd_init(void);
+void _cd_control(unsigned char com, unsigned char *param, int plen);
+void _cd_wait_ack(void);
+void _cd_wait(void);
+
+int CdInit(int mode)
+{
+	// Sets up CD-ROM hardware and low-level subsystem
+	_cd_init();
+	
+	// So CD ISO file system component will update the ISO descriptor
+	_cd_media_changed = 1;
+	
+	// Issue commands to initialize the CD-ROM hardware
+	CdControl(CdlNop, 0, 0);
+	CdControl(CdlInit, 0, 0);
+	
+	if( CdSync(0, 0) != CdlDiskError )
+	{
+		CdControl(CdlDemute, 0, 0);
+		printf("psxcd: Init Ok!\n");
+	}
+	else
+	{
+		printf("psxcd: Error initializing. Bad disc/drive or no disc inserted.\n");
+	}
+	
+	return 1;
+}
+
+int CdControl(unsigned char com, unsigned char *param, unsigned char *result)
+{	
+	// Don't issue command if ack is not received yet
+	if( _cd_ack_wait )
+	{
+		return 0;
+	}
+	
+	_cd_result_ptr = result;
+	
+	CdControlF(com, param);
+	_cd_wait_ack();
+	
+	return 1;
+}
+
+int CdControlB(unsigned char com, unsigned char *param, unsigned char *result)
+{
+	if( !CdControl(com, param, result) )
+	{
+		return 0;
+	}
+	
+	CdSync(0, 0);
+	return 1;
+}
+
+int CdControlF(unsigned char com, unsigned char *param)
+{
+	int param_len=0;
+	
+	// Command specific parameters
+	switch(com)
+	{
+		case CdlSetloc:
+			param_len = 3;
+			break;
+		case CdlPlay:
+			if( param )
+			{
+				param_len = 1;
+			}
+			break;
+		case CdlSetfilter:
+			param_len = 2;
+			break;
+		case CdlSetmode:
+			param_len = 1;
+			break;
+		case CdlSetsession:
+			param_len = 1;
+			break;
+		case CdlTest:
+			param_len = 1;
+			break;
+		case CdlGetTD:
+			param_len = 1;
+	}
+	
+	// Issue Setloc if parameters are specified on CdlReadN and CdlReadS
+	if( ( com == CdlReadN ) || ( com == CdlReadS ) )
+	{
+		if( param )
+		{
+			_cd_control(CdlSetloc, param, 3);
+		}
+	}
+	
+	// Issue CD command
+	_cd_control(com, param, param_len);
+	
+	return 1;
+}
+
+int CdSync(int mode, unsigned char *result)
+{
+	int cdirq;
+	
+	if( mode )
+	{
+		if( result )
+		{
+			*result = _cd_status;
+		}
+		
+		cdirq = _cd_last_int;
+		if( cdirq == CdlAcknowledge )
+		{
+			cdirq = CdlComplete;
+		}
+		return cdirq;
+	}
+	
+	_cd_wait();
+	
+	if( result )
+	{
+		*result = _cd_status;
+	}
+	
+	cdirq = _cd_last_int;
+	if( cdirq == CdlAcknowledge )
+	{
+		cdirq = CdlComplete;
+	}
+	
+	return cdirq;
+}
+
+int CdGetToc(CdlLOC *toc)
+{
+	u_char track_info[8];
+	int i,tracks;
+	
+	// Get number of tracks
+	if( !CdControl(CdlGetTN, 0, track_info) )
+	{
+		return 0;
+	}
+	
+	if( CdSync(1, 0) != CdlComplete )
+	{
+		return 0;
+	}
+	
+	tracks = 1+(btoi(track_info[2])-btoi(track_info[1]));
+	
+	// Get track positions
+	for(i=0; i<tracks; i++)
+	{
+		int t = itob(1+i);
+		if( !CdControl(CdlGetTD, (u_char*)&t, (u_char*)&toc[i]) )
+		{
+			return 0;
+		}
+		if( CdSync(1, 0) != CdlComplete )
+		{
+			return 0;
+		}
+		toc[i].sector = 0;
+		toc[i].track = 1+i;
+	}
+	
+	return tracks;
+}
+
+CdlLOC *CdIntToPos(int i, CdlLOC *p) {
+
+	i += 150;
+	
+	p->minute = itob((i/75)/60);
+	p->second = itob((i/75)%60);
+	p->sector = itob(i%75);
+
+	return p;
+	
+}
+
+int CdPosToInt(CdlLOC *p)
+{	
+	return ((75*(btoi(p->minute)*60))+(75*btoi(p->second))+btoi(p->sector))-150;
+}
+
+int CdStatus(void)
+{	
+	return _cd_status;	
+}
+
+int CdMode(void)
+{
+	return _cd_last_mode;
+}
+
+
+// CD data read routines
+volatile int _cd_sector_count = 0;
+volatile unsigned int *_cd_read_addr;
+volatile unsigned char _cd_read_result[8];
+volatile unsigned int _cd_read_oldcb;
+volatile unsigned int _cd_read_sector_sz;
+volatile CdlCB _cd_read_cb;
+
+// Sector callback
+static void _CdReadReadyCallback(int status, unsigned char *result)
+{
+	if( status == CdlDataReady )
+	{
+		// Fetch sector from CD controller
+		CdGetSector((void*)_cd_read_addr, _cd_read_sector_sz);
+		
+		// Increment destination address
+		_cd_read_addr += _cd_read_sector_sz>>2;
+	
+		// Subtract sector count
+		_cd_sector_count--;
+	}
+	
+	// End reading with pause command when sector count reaches zero
+	// or when an error occurs
+	if( ( _cd_sector_count <= 0 ) || ( status == CdlDiskError ) )
+	{
+		// Stop reading
+		_cd_control(CdlPause, 0, 0);
+		
+		// Revert previous ready callback
+		_cd_callback_int1_data = (CdlCB)_cd_read_oldcb;
+		
+		// Execute read completion callback
+		if( _cd_read_cb )
+		{
+			_cd_read_cb(status, result);
+		}
+	}
+}
+
+int CdRead(int sectors, unsigned int *buf, int mode)
+{
+	// Set sectors to read count
+	_cd_sector_count = sectors;
+	_cd_read_addr = buf;
+	
+	// Determine sector based on mode flags
+	if( mode & CdlModeSize0 )
+	{
+		_cd_read_sector_sz = 2328;
+	}
+	else if( mode & CdlModeSize1 )
+	{
+		_cd_read_sector_sz = 2340;
+	}
+	else
+	{
+		_cd_read_sector_sz = 2048;
+	}
+	
+	// Set readt callback
+	_cd_read_oldcb = CdReadyCallback(_CdReadReadyCallback);
+	
+	// Set specified mode
+	CdControl(CdlSetmode, (unsigned char*)&mode, 0);
+	
+	// Begin reading sectors
+	CdControl(CdlReadN, 0, (unsigned char*)_cd_read_result);
+	
+	return 0;
+}
+
+int CdReadSync(int mode, unsigned char *result)
+{
+	if( mode )
+	{
+		if( CdSync(1, 0) == CdlDiskError )
+		{
+			return -1;
+		}
+		return _cd_sector_count;
+	}
+	
+	while(_cd_sector_count > 0);
+	if( CdSync(0, result) != CdlComplete )
+	{
+		return -1;
+	}
+	
+	return 0;
+}
+
+unsigned int CdReadCallback(CdlCB func)
+{
+	unsigned int old_func;
+	
+	old_func = (unsigned int)_cd_read_cb;
+	
+	_cd_read_cb = func;
+	
+	return old_func;
+}
diff --git a/libpsn00b/libpsxcd/psxcd_asm.s b/libpsn00b/libpsxcd/psxcd_asm.s
new file mode 100644
index 0000000..7fe1c1d
--- /dev/null
+++ b/libpsn00b/libpsxcd/psxcd_asm.s
@@ -0,0 +1,520 @@
+.set noreorder
+
+.include "hwregs_a.h"
+
+.section .text
+
+.global _cd_init
+.type _cd_init, @function
+_cd_init:
+
+	addiu	$sp, -4
+	sw		$ra, 0($sp)
+	
+	jal		EnterCriticalSection
+	nop
+	
+	lui		$a3, IOBASE				# Acknowledge all CD IRQs
+	li		$v0, 1
+	sb		$v0, CD_REG0($a3)
+	li		$v0, 0x1f
+	sb		$v0, CD_REG3($a3)
+	sb		$v0, CD_REG2($a3)		# Enable all IRQs
+	
+	sb		$0 , CD_REG0($a3)
+	sb		$0 , CD_REG3($a3)
+	
+	li		$v0, 0x1325
+	sw		$v0, COM_DELAY($a3)
+	
+	la		$a1, _cd_handler
+	jal		InterruptCallback
+	li		$a0, 2
+	
+	li		$v0, 2					# Set CD left volume
+	sb		$v0, CD_REG0($a3)
+	li		$v0, 0x80
+	sb		$v0, CD_REG2($a3)
+	
+	li		$v0, 3					# Set CD right volume
+	sb		$v0, CD_REG0($a3)
+	li		$v0, 0x80
+	sb		$v0, CD_REG1($a3)
+	
+	li		$v0, 0x20				# Apply volume
+	sb		$v0, CD_REG3($a3)
+	
+	# Clear a bunch of stats
+	la		$v0, _cd_ack_wait
+	sb		$0 , 0($v0)
+	la		$v0, _cd_complt_wait
+	sb		$0 , 0($v0)
+	la		$v0, _cd_last_cmd
+	sb		$0 , 0($v0)
+	la		$v0, _cd_last_mode
+	sb		$0 , 0($v0)
+	la		$v0, _cd_last_int
+	sb		$0 , 0($v0)
+	
+	la		$v0, _cd_result_ptr
+	sw		$0 , 0($v0)
+	
+	# Clear callback hooks
+	la		$v0, _cd_callback_int1_data
+	sw		$0 , 0($v0)
+	la		$v0, _cd_callback_int4
+	sw		$0 , 0($v0)
+	
+	la		$v0, _cd_read_cb
+	sw		$0 , 0($v0)
+	
+	lw		$v0, DPCR($a3)
+	li		$v1, 0xB000
+	or		$v0, $v1
+	sw		$v0, DPCR($a3)
+	
+	jal		ExitCriticalSection
+	nop
+	
+	#li		$a0, 0x01				# GetStat
+	#jal		_cd_control
+	#move	$a2, $0
+	#jal		_cd_wait
+	#nop
+	
+	#li		$a0, 0x0a				# Init
+	#jal		_cd_control
+	#move	$a2, $0
+	#jal		_cd_wait
+	#nop
+	
+	#li		$a0, 0x0c				# Demute
+	#jal		_cd_control
+	#move	$a2, $0
+	#jal		_cd_wait
+	#nop
+	
+	#la		$a0, _cd_init_msg
+	#jal		printf
+	#addiu	$sp, -16
+	#addiu	$sp, 16
+	
+	lw		$ra, 0($sp)
+	addiu	$sp, 4
+	jr		$ra
+	nop
+	
+	
+.global _cd_wait
+.type _cd_wait, @function
+_cd_wait:
+	la		$v0, _cd_ack_wait
+	lbu		$v0, 0($v0)
+	nop
+	bnez	$v0, _cd_wait
+	nop
+.Lcomplete:
+	la		$v0, _cd_complt_wait
+	lbu		$v0, 0($v0)
+	nop
+	bnez	$v0, .Lcomplete
+	nop
+	jr		$ra
+	nop
+
+	
+.global _cd_wait_ack
+.type _cd_wait_ack, @function
+_cd_wait_ack:
+	la		$v0, _cd_ack_wait
+	lbu		$v0, 0($v0)
+	nop
+	bnez	$v0, _cd_wait_ack
+	nop
+	jr		$ra
+	nop
+	
+	
+.global _cd_wait_complt
+.type _cd_wait_complt, @function
+_cd_wait_complt:
+	la		$v0, _cd_complt_wait
+	lbu		$v0, 0($v0)
+	nop
+	bnez	$v0, _cd_wait_complt
+	nop
+	jr		$ra
+	nop
+	
+	
+.type _cd_handler, @function
+_cd_handler:
+
+	addiu	$sp, -4
+	sw		$ra, 0($sp)
+	
+	lui		$a3, IOBASE				# Print out IRQ number
+	li		$v0, 1
+	sb		$v0, CD_REG0($a3)
+
+	lbu		$v0, CD_REG3($a3)
+	nop
+	andi	$v0, 0x7
+	
+	la		$v1, _cd_last_int		# Save last IRQ value
+	sb		$v0, 0($v1)
+	
+	bne		$v0, 0x1, .Lno_data
+	nop
+	
+	sb		$0 , CD_REG0($a3)		# Load data FIFO on INT1
+	li		$v1, 0x80
+	sb		$v1, CD_REG3($a3)
+	
+.Lno_data:
+	
+	li		$v1, 1
+	sb		$v1, CD_REG0($a3)		# Clear CD interrupt and parameter FIFO
+	li		$v1, 0x5f
+	sb		$v1, CD_REG3($a3)
+	li		$v1, 0x40
+	sb		$v1, CD_REG3($a3)
+	
+	li		$v1, 0					# Delay when clearing parameter FIFO
+	sw		$v1, 0($0)
+	li		$v1, 1
+	sw		$v1, 0($0)
+	li		$v1, 2
+	sw		$v1, 0($0)
+	li		$v1, 3
+	sw		$v1, 0($0)
+	
+	beq		$v0, 0x1, .Lirq_1		# Data ready
+	nop
+	beq		$v0, 0x2, .Lirq_2		# Command finish
+	nop
+	beq		$v0, 0x3, .Lirq_3		# Acknowledge
+	nop
+	beq		$v0, 0x4, .Lirq_4		# Data/track end
+	nop
+	beq		$v0, 0x5, .Lirq_5		# Error
+	nop
+	
+	b		.Lirq_misc
+	nop
+	
+.Lirq_1:	# Data ready
+	
+	jal		_cd_fetch_result
+	nop
+	
+	la		$v0, _cd_callback_int1_data
+	lw		$v0, 0($v0)
+	nop
+	beqz	$v0, .Lirq_misc
+	nop
+	
+	la		$a0, _cd_last_int
+	lbu		$a0, 0($a0)
+	la		$a1, _cd_result_ptr
+	lw		$a1, 0($a1)
+	
+	jalr	$v0
+	addiu	$sp, -16
+	addiu	$sp, 16
+	
+	b		.Lirq_misc
+	nop
+	
+.Lirq_2:	# Command complete
+
+	jal		_cd_fetch_result
+	nop
+	
+	la		$v0, _cd_complt_wait
+	sb		$0 , 0($v0)
+	
+	la		$v0, _cd_sync_cb
+	lw		$v0, 0($v0)
+	nop
+	beqz	$v0, .Lirq_misc
+	nop
+	
+	la		$a0, _cd_last_int
+	lbu		$a0, 0($a0)
+	la		$a1, _cd_result_ptr
+	lw		$a1, 0($a1)
+	jalr	$v0
+	addiu	$sp, -16
+	addiu	$sp, 16
+	
+	b		.Lirq_misc
+	nop
+	
+.Lirq_3:	# Command acknowledge
+	
+	jal		_cd_fetch_result
+	nop
+	
+	la		$v0, _cd_ack_wait
+	sb		$0 , 0($v0)
+	
+	b		.Lirq_misc
+	nop
+	
+.Lirq_4:
+
+	jal		_cd_fetch_result
+	nop
+	
+	la		$v0, _cd_callback_int4
+	lw		$v0, 0($v0)
+	nop
+	beqz	$v0, .Lirq_misc
+	nop
+	
+	jalr	$v0
+	addiu	$sp, -16
+	addiu	$sp, 16
+	
+	b		.Lirq_misc
+	nop
+	
+.Lirq_5:	# Error
+	
+	jal		_cd_fetch_result
+	nop
+	
+	la		$v0, _cd_complt_wait
+	lbu		$v0, 0($v0)
+	nop
+	beqz	$v0, .Lno_complete
+	nop
+	
+	la		$v0, _cd_sync_cb
+	lw		$v0, 0($v0)
+	nop
+	beqz	$v0, .Lno_complete
+	nop
+	
+	li		$a0, 0x05				# CdlDiskError
+	la		$a1, _cd_result_ptr
+	lw		$a1, 0($a1)
+	jalr	$v0
+	addiu	$sp, -16
+	addiu	$sp, 16
+	
+.Lno_complete:
+
+	la		$v0, _cd_complt_wait
+	sb		$0 , 0($v0)
+	la		$v0, _cd_ack_wait
+	sb		$0 , 0($v0)
+	
+	la		$v0, _cd_callback_int1_data
+	lw		$v0, 0($v0)
+	nop
+	beqz	$v0, .Lirq_misc
+	nop
+	
+	li		$a0, 0x05				# CdlDiskError
+	la		$a1, _cd_result_ptr
+	lw		$a1, 0($a1)
+	
+	jalr	$v0
+	addiu	$sp, -16
+	addiu	$sp, 16
+	
+.Lirq_misc:
+	
+	lw		$ra, 0($sp)
+	addiu	$sp, 4
+	jr		$ra
+	nop
+	
+
+_cd_fetch_result:
+
+	lui		$a3, IOBASE
+	
+	la		$a0, _cd_status
+	lbu		$v0, CD_REG1($a3)
+	
+	la		$v1, _cd_last_int
+	lbu		$v1, 0($v1)
+	nop
+	beq		$v1, 0x2, .Lirq2_checks
+	nop
+	
+	# IRQ3 checks
+	
+	la		$v1, _cd_last_cmd
+	lbu		$v1, 0($v1)
+	nop
+	beq		$v1, 0x10, .Lskip_status
+	nop
+	beq		$v1, 0x11, .Lskip_status
+	nop
+
+	b		.Lwrite_status
+	nop
+	
+	# IRQ2 checks
+	
+.Lirq2_checks:
+
+	la		$v1, _cd_last_cmd
+	lbu		$v1, 0($v1)
+	nop
+	beq		$v1, 0x1D, .Lskip_status
+	nop
+
+.Lwrite_status:
+
+	sb		$v0, 0($a0)
+	
+.Lskip_status:
+
+	la		$a0, _cd_result_ptr
+	lw		$a0, 0($a0)
+	nop
+	beqz	$a0, .Lno_result
+	nop
+	sb		$v0, 0($a0)
+	addiu	$a0, 1
+	
+.Lread_futher_result:
+
+	lbu		$v0, CD_REG0($a3)
+	nop
+	andi	$v0, 0x20
+	beqz	$v0, .Lno_result
+	nop
+
+	lbu		$v0, CD_REG1($a3)
+	lbu		$v1, CD_REG0($a3)
+	sb		$v0, 0($a0)
+	andi	$v1, 0x20
+	bnez	$v1, .Lread_futher_result
+	addiu	$a0, 1
+
+.Lno_result:
+
+	jr		$ra
+	nop
+	
+	
+.global CdAutoPauseCallback
+.type CdAutoPauseCallback, @function
+CdAutoPauseCallback:
+	
+	addiu	$sp, -8
+	sw		$ra, 0($sp)
+	sw		$a0, 4($sp)
+	
+	la		$v1, _cd_callback_int4
+	lw		$v0, 0($v1)
+	
+	la		$v1, _cd_callback_int4
+	
+	jal		EnterCriticalSection
+	nop
+	
+	lw		$a0, 4($sp)
+	nop
+	sw		$a0, 0($v1)
+	
+	jal		ExitCriticalSection
+	nop
+	
+	lw		$ra, 0($sp)
+	addiu	$sp, 8
+	jr		$ra
+	nop
+	
+	
+.global CdReadyCallback
+.type CdReadyCallback, @function
+CdReadyCallback:
+	
+	addiu	$sp, -12
+	sw		$ra, 0($sp)
+	sw		$a0, 4($sp)
+	
+	la		$v1, _cd_callback_int1_data
+	lw		$v0, 0($v1)
+	
+	la		$v1, _cd_callback_int1_data
+	sw		$v0, 8($sp)
+	
+	jal		EnterCriticalSection
+	nop
+	
+	lw		$a0, 4($sp)
+	nop
+	sw		$a0, 0($v1)
+	
+	jal		ExitCriticalSection
+	nop
+	
+	lw		$ra, 0($sp)
+	lw		$v0, 8($sp)
+	jr		$ra
+	addiu	$sp, 12
+	
+	
+.global CdSyncCallback
+.type CdSyncCallback, @function
+CdSyncCallback:
+	addiu	$sp, -12
+	sw		$ra, 0($sp)
+	sw		$a0, 4($sp)
+	
+	la		$v1, _cd_sync_cb
+	lw		$v0, 0($v1)
+	
+	la		$v1, _cd_sync_cb
+	sw		$v0, 8($sp)
+	
+	jal		EnterCriticalSection
+	nop
+	
+	lw		$a0, 4($sp)
+	nop
+	sw		$a0, 0($v1)
+	
+	jal		ExitCriticalSection
+	nop
+	
+	lw		$ra, 0($sp)
+	lw		$v0, 8($sp)
+	jr		$ra
+	addiu	$sp, 12
+	
+
+.section .data
+	
+.global psxcd_credits
+.type psxcd_credits, @object
+psxgpu_credits:
+	.ascii "psxcd library programs by Lameguy64\n"
+	.asciiz "2019 PSn00bSDK Project / Meido-Tek Productions\n"
+	
+_cd_init_msg:
+.asciiz "psxcd: Init OK\n"
+.align 4
+	
+.comm	_cd_last_cmd, 1, 1
+.comm	_cd_last_mode, 1, 1
+.comm	_cd_ack_wait, 1, 1
+.comm	_cd_complt_wait, 1, 1
+
+.comm	_cd_status, 1, 1
+.comm	_cd_last_int, 1, 1
+
+.comm	_cd_media_changed, 1, 1
+
+# Callback hooks
+.comm	_cd_callback_int1_data, 4, 4		# Data IRQ callback
+.comm	_cd_callback_int4, 4, 4		# Autopause callback
+.comm	_cd_sync_cb, 4, 4
diff --git a/libpsn00b/libpsxcd/readme.txt b/libpsn00b/libpsxcd/readme.txt
new file mode 100644
index 0000000..a85fab5
--- /dev/null
+++ b/libpsn00b/libpsxcd/readme.txt
@@ -0,0 +1,48 @@
+PSX CD-ROM library, part of PSn00bSDK
+2019 Lameguy64 / Meido-Tek Productions
+
+Licensed under Mozilla Public License
+
+	Open source implementation of the long awaited CD-ROM library that
+provides greater functionality than the BIOS CD-ROM subsystem. Supports
+pretty much all features of the CD-ROM hardware such as CD data read,
+CD Audio and XA audio playback. Data streaming should also be possible
+with the use of CdlReadN/CdlReadS commands and CdReadyCallback().
+
+	Library also includes an ISO9660 file system parser for locating
+files within the CD-ROM file system. Unlike the file system parser in
+the official libraries libpsxcd can parse directories containing any
+number of files. Rock-ridge and Joliet extensions are not supported
+however.
+
+	Be aware that the CD-ROM library might have some loose ends as it
+is still a work in progress, but should work flawlessly in most use
+cases.
+
+
+Library developer(s):
+
+	Lameguy64
+
+
+Library header(s):
+
+	psxcd.h
+
+
+Todo list:
+
+	* Command query mechanism so that more than 2 CD-ROM commands can
+	  easily be issued in callbacks. Official library probably does this.
+	
+	* Helper functions for handling disc changes (CdDiskReady and
+	  CdGetDiskType) are not yet implemented.
+	
+	* CdReadBreak() not yet implemented.
+	
+	* Data streaming functions (prefixed with St*) not yet implemented.
+	  Would require devising a PSn00bSDK equivalent of the STR file
+	  format.
+	
+	* Original functions for querying directory contents in the file
+	  system not yet implemented.
\ No newline at end of file
diff --git a/libpsn00b/makefile b/libpsn00b/makefile
index d4bba32..f095f17 100644
--- a/libpsn00b/makefile
+++ b/libpsn00b/makefile
@@ -4,7 +4,7 @@
 
 TOPTARGETS	= all clean
 
-LIBDIRS 	= libc lzp psxgpu psxgte psxapi psxetc psxspu psxsio
+LIBDIRS 	= libc lzp psxgpu psxgte psxapi psxetc psxspu psxsio libpsxcd
 
 
 $(TOPTARGETS): $(LIBDIRS)
diff --git a/libpsn00b/psxapi/sys/adddummytty.s b/libpsn00b/psxapi/sys/adddummytty.s
new file mode 100644
index 0000000..a569d38
--- /dev/null
+++ b/libpsn00b/psxapi/sys/adddummytty.s
@@ -0,0 +1,10 @@
+.set noreorder
+
+.section .text
+
+.global AddDummyTty
+.type AddDummyTty, @function
+AddDummyTty:
+	addiu	$t2, $0, 0xa0
+	jr		$t2
+	addiu	$t1, $0, 0x99
diff --git a/libpsn00b/psxapi/sys/getrcnt.s b/libpsn00b/psxapi/sys/getrcnt.s
new file mode 100644
index 0000000..0b035ed
--- /dev/null
+++ b/libpsn00b/psxapi/sys/getrcnt.s
@@ -0,0 +1,10 @@
+.set noreorder
+
+.section .text
+
+.global GetRCnt
+.type GetRCnt, @function
+GetRCnt:
+	addiu	$t2, $0, 0xb0
+	jr		$t2
+	addiu	$t1, $0, 0x03
\ No newline at end of file
diff --git a/libpsn00b/psxapi/sys/resetrcnt.s b/libpsn00b/psxapi/sys/resetrcnt.s
new file mode 100644
index 0000000..5811625
--- /dev/null
+++ b/libpsn00b/psxapi/sys/resetrcnt.s
@@ -0,0 +1,10 @@
+.set noreorder
+
+.section .text
+
+.global ResetRCnt
+.type ResetRCnt, @function
+ResetRCnt:
+	addiu	$t2, $0, 0xb0
+	jr		$t2
+	addiu	$t1, $0, 0x06
\ No newline at end of file
diff --git a/libpsn00b/psxapi/sys/setrcnt.s b/libpsn00b/psxapi/sys/setrcnt.s
new file mode 100644
index 0000000..ec6180a
--- /dev/null
+++ b/libpsn00b/psxapi/sys/setrcnt.s
@@ -0,0 +1,10 @@
+.set noreorder
+
+.section .text
+
+.global SetRCnt
+.type SetRCnt, @function
+SetRCnt:
+	addiu	$t2, $0, 0xb0
+	jr		$t2
+	addiu	$t1, $0, 0x02
\ No newline at end of file
diff --git a/libpsn00b/psxapi/sys/startrcnt.s b/libpsn00b/psxapi/sys/startrcnt.s
new file mode 100644
index 0000000..0fd5c33
--- /dev/null
+++ b/libpsn00b/psxapi/sys/startrcnt.s
@@ -0,0 +1,10 @@
+.set noreorder
+
+.section .text
+
+.global StartRCnt
+.type StartRCnt, @function
+StartRCnt:
+	addiu	$t2, $0, 0xb0
+	jr		$t2
+	addiu	$t1, $0, 0x04
\ No newline at end of file
diff --git a/libpsn00b/psxapi/sys/stoprcnt.s b/libpsn00b/psxapi/sys/stoprcnt.s
new file mode 100644
index 0000000..4af94da
--- /dev/null
+++ b/libpsn00b/psxapi/sys/stoprcnt.s
@@ -0,0 +1,10 @@
+.set noreorder
+
+.section .text
+
+.global StopRCnt
+.type StopRCnt, @function
+StopRCnt:
+	addiu	$t2, $0, 0xb0
+	jr		$t2
+	addiu	$t1, $0, 0x05
\ No newline at end of file
diff --git a/libpsn00b/psxgpu/drawsync.s b/libpsn00b/psxgpu/drawsync.s
index 66d37e2..2e29381 100644
--- a/libpsn00b/psxgpu/drawsync.s
+++ b/libpsn00b/psxgpu/drawsync.s
@@ -24,7 +24,7 @@ DrawSync:
 	nop
 	
 .Ldma_wait:
-	lw		$v0, D2_CHCR
+	lw		$v0, D2_CHCR($a0)
 	nop
 	srl		$v0, 24
 	andi	$v0, 0x1
@@ -64,4 +64,4 @@ DrawSync:
 
 	jr		$ra
 	srl		$v0, 16
-	
\ No newline at end of file
+	
diff --git a/libpsn00b/psxgpu/readme.txt b/libpsn00b/psxgpu/readme.txt
index 8fe439b..b626e1d 100644
--- a/libpsn00b/psxgpu/readme.txt
+++ b/libpsn00b/psxgpu/readme.txt
@@ -5,9 +5,9 @@ Licensed under Mozilla Public License
 
 	Open source implementation of the GPU library written mostly in MIPS
 assembly. Supports DMA transfers for ordering table draw and transferring
-image data to VRAM. The syntax is intentionally made to closely resemble
-Sony's syntax for familiarity and to make porting homebrew made using the
-official SDK to PSn00bSDK a little easier.
+image data to and from VRAM. The syntax is intentionally made to closely
+resemble Sony's syntax for familiarity and to make porting homebrew made
+using the official SDK to PSn00bSDK a little easier.
 
 
 Library developer(s):
@@ -25,5 +25,3 @@ Todo list:
 
 	* ClearOTag() function (non reverse version of ClearOTagR()) yet to be
 	  implemented (but should be trivial).
-	  
-	* StoreImage() equivalent yet to be implemented.
diff --git a/libpsn00b/psxgpu/resetgraph.s b/libpsn00b/psxgpu/resetgraph.s
index 93ce185..b956873 100644
--- a/libpsn00b/psxgpu/resetgraph.s
+++ b/libpsn00b/psxgpu/resetgraph.s
@@ -4,7 +4,7 @@
 
 .section .text
 
-.set ISR_STACK_SIZE, 1024
+.set ISR_STACK_SIZE, 2048
 
 .global ResetGraph						# Resets the GPU and installs a
 .type ResetGraph, @function				# VSync event handler
diff --git a/libpsn00b/psxgte/readme.txt b/libpsn00b/psxgte/readme.txt
index 74951c5..13067ee 100644
--- a/libpsn00b/psxgte/readme.txt
+++ b/libpsn00b/psxgte/readme.txt
@@ -29,7 +29,7 @@ Library header(s):
 	
 Todo list:
 
-	* Alternate RotMatrix() functions with different rotation order are yet to
+	* Alternate RotMatrix() functions with different rotation orders are yet to
 	  be implemented.
 	* Various high level RotTransPersp style functions not yet implemented.
 	
diff --git a/libpsn00b/psxsio/siocons.c b/libpsn00b/psxsio/siocons.c
index cd99d68..76bf8be 100644
--- a/libpsn00b/psxsio/siocons.c
+++ b/libpsn00b/psxsio/siocons.c
@@ -1,9 +1,25 @@
 #include <stdio.h>
+#include <string.h>
 #include <psxapi.h>
 #include <psxgpu.h>
 #include <psxsio.h>
 
+#define SIO_BUFF_LEN	32
+
+static volatile int _sio_key_pending;
+
+static volatile int _sio_buff_rpos;
+static volatile int _sio_buff_wpos;
+static volatile char _sio_buff[SIO_BUFF_LEN];
+
 static void _sio_init() {
+	
+	_sio_key_pending = 0;
+	
+	memset((void*)_sio_buff, 0, SIO_BUFF_LEN);
+	_sio_buff_rpos = 0;
+	_sio_buff_wpos = 0;
+
 }
 
 static int _sio_open(FCB *fcb, const char* file, int mode) {
@@ -29,9 +45,25 @@ static int _sio_inout(FCB *fcb, int cmd) {
 		
 	} else if (cmd == 1) { // Read
 	
-		for(i=0; i<fcb->trns_len; i++) {
+		/*for(i=0; i<fcb->trns_len; i++) {
 			while(!(_sio_control(0, 0, 0) & SR_RXRDY));
 			((char*)fcb->trns_addr)[i] = _sio_control(0, 4, 0);
+		}*/
+		
+		
+		
+		for(i=0; i<fcb->trns_len; i++) {
+			
+			while( _sio_key_pending == 0 );
+			
+			((char*)fcb->trns_addr)[i] = _sio_buff[_sio_buff_rpos];
+			_sio_key_pending--;
+			_sio_buff_rpos++;
+			if( _sio_buff_rpos >= SIO_BUFF_LEN )
+			{
+				_sio_buff_rpos = 0;
+			}
+			
 		}
 		
 		return fcb->trns_len;
@@ -48,6 +80,29 @@ static int _sio_close(int h) {
 	
 }
 
+static void _sio_tty_cb(void)
+{
+	_sio_key_pending++;
+	
+	// Get received byte
+	if( _sio_key_pending < SIO_BUFF_LEN )
+	{
+		_sio_buff[_sio_buff_wpos] = _sio_control(0, 4, 0);
+		_sio_buff_wpos++;
+		if( _sio_buff_wpos >= SIO_BUFF_LEN )
+		{
+			_sio_buff_wpos = 0;
+		}
+	}
+	else
+	{
+		_sio_control(0, 4, 0);
+	}
+	
+	// Acknowledge SIO IRQ
+	_sio_control(2, 1, 0);
+}
+
 static DCB _sio_dcb = {
 	"tty",
 	0x3,
@@ -74,15 +129,12 @@ static DCB _sio_dcb = {
 
 volatile void (*_sio_callback)(void) = NULL;
 
-extern void _sio_irq_handler(void);
-
-
 void AddSIO(int baud) {
 	
 	_sio_control(2, 0, 0);
 	_sio_control(1, 2, MR_SB_01|MR_CHLEN_8|0x02);
 	_sio_control(1, 3, baud);
-	_sio_control(1, 1, CR_RXEN|CR_TXEN);
+	_sio_control(1, 1, CR_RXEN|CR_TXEN|CR_RXIEN);
 	
 	close(0);
 	close(1);
@@ -90,6 +142,8 @@ void AddSIO(int baud) {
 	DelDev(_sio_dcb.name);
 	AddDev(&_sio_dcb);
 	
+	Sio1Callback(_sio_tty_cb);
+	
 	open(_sio_dcb.name, 2);
 	open(_sio_dcb.name, 1);
 	
@@ -97,12 +151,17 @@ void AddSIO(int baud) {
 
 void DelSIO(void) {
 	
+	Sio1Callback(NULL);
+	
 	// Reset serial interface
 	_sio_control(2, 0, 0);
 	
 	// Remove TTY device
 	DelDev(_sio_dcb.name);
 	
+	// Add dummy TTY device
+	AddDummyTty();
+		
 }
 
 void WaitSIO(void) {
@@ -134,4 +193,9 @@ void *Sio1Callback(void (*func)()) {
 	
 	return old_isr;
 	
-}
\ No newline at end of file
+}
+
+int kbhit()
+{
+	return(_sio_key_pending>0);
+}
diff --git a/libpsn00b/psxspu/spuinit.s b/libpsn00b/psxspu/spuinit.s
index d3a8e8d..42f302a 100644
--- a/libpsn00b/psxspu/spuinit.s
+++ b/libpsn00b/psxspu/spuinit.s
@@ -3,7 +3,7 @@
 
 .include "hwregs_a.h"
 
-.section .data
+.section .text
 
 
 .global SpuInit
diff --git a/libpsn00b/readme.txt b/libpsn00b/readme.txt
index 43b120a..1e2e6d7 100644
--- a/libpsn00b/readme.txt
+++ b/libpsn00b/readme.txt
@@ -3,100 +3,108 @@ LibPSn00b, PSn00bSDK software libraries
 
 Licensed under Mozilla Public License
 
-LibPSn00b make up the majority of PSn00bSDK as it provides the functions
-necessary for developing software for the PSX. Most libraries, mainly the
-GPU and GTE libraries are written mostly in assembly language.
 
+LibPSn00b is a collection of libraries which make up the core backbone of
+PSn00bSDK as it provides an essential software framework for developing
+homebrew software for the PSX platform. Great majority of the libraries
+are been written from scratch written in a mix of C and hand optimized
+assembly language for best performance.
 
-Brief library overview:
+These libraries can only be compiled with a build of GCC that supports mipsel
+as one of the supported targets, naturally as these libraries are intended
+for the PSX hardware which uses a MIPS R3000 CPU supported by mipsel.
+Compiler version shouldn't matter much and should build fine in 9.1.0,
+though 7.4.0 is the most recommended version to use as it is the version
+currently used for the majority of the development and testing of LibPSn00b.
+
+
+Brief summary of libraries:
 
 	libc	- Standard C library. Contains only a small subset of the full
-			  standard C library, mostly string and memory manipulation
-			  functions.
+			  standard C library such as string and memory manipulation
+			  functions. Should include libgcc for special compiler specific
+			  dependencies and prevents libc related linker hell.
 			  
-	psxgpu	- GPU library for video and graphics control. Most of the
-			  important functions are implemented.
+	psxgpu	- GPU library for video and graphics control. Also includes
+			  interrupt handling for various library subsystems.
 	
-	psxgte	- GTE library for GTE accelerated vector transformations. Most
-			  important functions are implemented.
+	psxgte	- GTE library for GTE accelerated vector transformations necessary
+			  for high performance 3D graphics.
 			  
-	psxapi	- Provides access to most of the BIOS functions calls of the
-			  PSX BIOS.
+	psxapi	- Provides access to various BIOS functions in the PSX BIOS.
 			  
-	psxetc	- Provides some misc functions such as debug font.
+	psxetc	- Provides some miscellaneous features such as debug font.
 
-	psxspu	- SPU library. Basic functions such as hardware init, uploading
-			  data to SPU RAM via DMA transfer and playing sound playback
-			  are fully working but is currently lacking a number of
-			  important functions, especially reverb.
+	psxspu	- SPU library. Basic capabilities such as hardware init,
+			  sample upload using DMA and playing samples are supported.
+			  Lacks support for reverb and various sequenced music related
+			  features.
 			   
-	Each library has its own readme file that contains its changelog, todo
-	list, credits and some additional details of the library.
+	Each library has its own readme file that contains a todo list, credits
+	and some additional details of the library. Changelog of all libraries are
+	compiled in the changelog.txt file.
 
 
 Compiling:
 
-	Compiling the LibPSn00b libraries requires GCC and binutils targetting
+	Compiling the LibPSn00b libraries requires GCC and binutils targeting
 	mipsel-unknown-elf built with libgcc. The path to those binaries must be
 	specified in your PATH environment variable and the binaries must be
 	prefixed by the target architecture (ie. mipsel-unknown-elf-gcc).
 
-	Simply run the Makefile in this directory using make (or gmake if you're
-	in a BSD environment). The Makefile should parse though each library
-	directory and run the makefile in it.
+	Simply run the Makefile in this directory with make (or gmake if you're
+	working in a BSD environment). The Makefile should parse though each
+	library directory and run the makefile in it.
 
 
 Documentation:
 
-	Documentation of all the libraries are found in libn00bref.odf and it features
-	the same formatting as the official library documents. The document can be
-	exported in PDF format for easier viewing with a web browser or PDF viewer.
+	Documentation of all the libraries are found in libn00bref.odf and it
+	features the same formatting as the official library documents. It is
+	recommended to export it as a PDF document for easier viewing.
 
 
 Contributing:
 
-	Contributions are open for this project. Just obey the following rules
-	when making a contribution:
+	Contributions are open for this project. But it is recommended to at
+	least follow the following rules when contributing to prevent headaches.
 
 	* If you add new functions to libpsn00b make sure you document them in
-	  libn00bref.odf. Documentation using Doxygen is discouraged.
-	* This project desires functions that interact with hardware registers to
-	  be written in assembly language. If you decide to write your functions
-	  that interact with hardware registers in C make sure you define your
-	  register pointers as volatile and they must work properly when compiled
-	  with -O2 optimization.
-	* Functions must work flawlessly on both emulators and real hardware.
-	* Don't forget to put your user name in the readme file of the library
-	  you've made a contribution on, and details of what you've changed in the
-	  changelog.
+	  libn00bref.odf. Documentation using Doxygen is not recommended.
+	  
+	* Library functions can either be written in C or assembly language
+	  whichever you prefer. Though it is not entirely mandatory but
+	  recommended to write functions that directly interact with hardware
+	  registers in assembly.
+	  
+	* Functions must work on both emulators and real hardware.
+	
+	* Don't forget to put your name in the readme file of the library you've
+	  made a contribution on and details of what you've changed in the
+	  changelog.txt file. Annoyingmous is not tolerated in this project.
+	  
 	* New functions that are not originally in the official SDK must be marked
-	  as original code in both the library headers and the libn00bref document.
+	  as original code in both the library headers and the libn00bref document
+	  to help differentiate from original functions and new additions.
 
 	
-Library to-do list:
-
-	Since the PSn00bSDK project still a work in progress, essential libraries
-	for CD and controllers support are not yet created but are high priority.
+LibPSn00b to-do list:
 
-	libc	 - Yet to include a complete C standard function
+	Because the PSn00bSDK project still a work in progress, a number of
+	essential libraries are considered but not yet developed. The following
+	lists a number of essential libraries not yet developed.
 	
-	psxcd	 - CD library. Not much progress as getting the CD controller to
-			   cooperate has been one heck of a force to be reckoned with.
-			   Gave up with my repeated attempts with no success. Absolutely
-			   huge props to anyone who can figure out how to use the CD
-			   controller properly! -Lameguy64
-
-	psxpad	 - Pad/tap/gun library. No work has been done on it currently.
-			   Supporting the Konami Justifier can be ignored as the way how
-			   that lightgun works is pretty crude and likely going to be
-			   awful to implement. Namco's Guncon is a lot simpler to
-			   implement.
-
-	psxpress - MDEC library. No work has been done on it currently. libpress
-			   from the official libraries also contains functions for
-			   encoding SPU compatible ADPCM data from raw PCM samples.
-
-	Before implementing CD and controller support a better interrupt handling
-	scheme must be implemented as it would save a lot of trouble. Details
-	regarding this interrupt handler implementation can be found in psxgpu's
-	readme document.
\ No newline at end of file
+	psxcd	 - Full CD-ROM support library.
+
+	psxpad	 - Pad/tap/gun library for better controller support. May support
+			   PS2 controllers natively. Should provide functions for directly
+			   controlling the controller/memory card interfaces to cater to
+			   development of custom peripherals.
+
+	psxmcrd  - Better and faster memory card library that works alongside the
+			   psxpad library.
+			   
+	psxpress - MDEC and data decompression library. May use DEFLATE for
+			   compressing MDEC data instead of Huffman as used in the
+			   official libraries, which may yield better compression and
+			   higher quality FMVs.
\ No newline at end of file