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| author | Xavi Del Campo <xavi.dcr@tutanota.com> | 2020-01-31 10:32:23 +0100 |
|---|---|---|
| committer | Xavi Del Campo <xavi.dcr@tutanota.com> | 2020-01-31 10:32:23 +0100 |
| commit | 7c24e9a9b02b04dcaf9507acb94091ea70a2c02d (patch) | |
| tree | c28d0748652ad4b4222309e46e6cfc82c0906220 /libpsx/src/memcard.c | |
| parent | a2b7b6bb1cc2f4a3258b7b2dbc92399d151f864d (diff) | |
| download | psxsdk-7c24e9a9b02b04dcaf9507acb94091ea70a2c02d.tar.gz | |
Imported pristine psxsdk-20190410 from official repo
Diffstat (limited to 'libpsx/src/memcard.c')
| -rw-r--r-- | libpsx/src/memcard.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/libpsx/src/memcard.c b/libpsx/src/memcard.c new file mode 100644 index 0000000..16debf9 --- /dev/null +++ b/libpsx/src/memcard.c @@ -0,0 +1,87 @@ +/*
+ * PSXSDK Memory Card Helper Functions
+ *
+ * These functions help to manage memory card loading/saving
+ *
+ * Normal file functions can be used to do this, but it will be very tedious...
+ */
+
+
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <fcntl.h>
+ #include <memcard.h>
+ #include <string.h>
+ #include <psx.h>
+
+static unsigned char card_cmd[140];
+static unsigned char arr[140];
+
+unsigned char McReadSector(int card_slot, int sector, unsigned char *buffer)
+{
+ memset(&card_cmd[0], 0, 140);
+
+ card_cmd[0] = 0x81; /*MC access*/
+ card_cmd[1] = 0x52; /*Read command*/
+
+ /*Copy frame number to command*/
+ card_cmd[4] = sector >> 8; /*Frame MSB*/
+ card_cmd[5] = sector & 0xFF; /*Frame LSB*/
+
+ QueryPAD(card_slot, card_cmd, arr, sizeof(card_cmd));
+
+ /*Copy received frame data*/
+ memcpy(buffer, &arr[10], 128);
+
+ /*Return RW status*/
+ return arr[139];
+}
+
+unsigned char McWriteSector(int card_slot, int sector, unsigned char *buffer)
+{
+ int i;
+
+ memset(&card_cmd[0], 0, 140);
+
+ card_cmd[0] = 0x81; /*MC access*/
+ card_cmd[1] = 0x57; /*Write command*/
+
+ /*Copy frame number to command*/
+ card_cmd[4] = sector >> 8; /*Frame MSB*/
+ card_cmd[5] = sector & 0xFF; /*Frame LSB*/
+
+ memcpy(&card_cmd[6], buffer, 128);
+
+ /* Compute checksum */
+ for(i = 4, card_cmd[134] = 0; i < 134; i++)
+ card_cmd[134] ^= card_cmd[i];
+
+ QueryPAD(card_slot, card_cmd, arr, sizeof(card_cmd));
+
+ /*Return RW status*/
+ return arr[137];
+}
+
+unsigned int McGetStatus(int card_slot)
+{
+ unsigned int status = 0;
+
+ memset(&card_cmd[0], 0, 140);
+
+ card_cmd[0] = 0x81; /*MC access*/
+ card_cmd[1] = 0x52; /*Read command*/
+
+ /*Copy frame number to command*/
+ card_cmd[4] = 0;//sector >> 8; /*Frame MSB*/
+ card_cmd[5] = 0;//sector & 0xFF; /*Frame LSB*/
+
+ QueryPAD(card_slot, card_cmd, arr, sizeof(card_cmd));
+
+ if(arr[2] == 0x5a && arr[3] == 0x5d)
+ status |= MEMCARD_CONNECTED;
+
+ if(arr[6] == 'M' && arr[7] == 'C')
+ status |= MEMCARD_FORMATTED;
+
+ return status;
+}
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