psxbios: Add checks for card_write, card_read

[pcsx_rearmed.git] / libpcsxcore / psxbios.c

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index fd60955..d4a38e1 100644 (file)
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -1279,11 +1279,29 @@ void psxBios__card_info() { // ab
 #ifdef PSXBIOS_LOG
        PSXBIOS_LOG("psxBios_%s: %x\n", biosA0n[0xab], a0);
 #endif
-
+       u32 ret;
        card_active_chan = a0;
 
+       switch (card_active_chan) 
+       {
+       case 0x00: case 0x01: case 0x02: case 0x03:
+               ret = Config.Mcd1[0] ? 0x2 : 0x8;
+               break;
+       case 0x10: case 0x11: case 0x12: case 0x13:
+               ret = Config.Mcd2[0] ? 0x2 : 0x8;
+               break;
+       default:
+#ifdef PSXBIOS_LOG
+               PSXBIOS_LOG("psxBios_%s: UNKNOWN PORT 0x%x\n", biosA0n[0xab], card_active_chan);
+#endif
+               ret = 0x11;
+               break;
+       }
+       
+//     DeliverEvent(0x11, 0x2); // 0xf0000011, 0x0004
 //     DeliverEvent(0x11, 0x2); // 0xf0000011, 0x0004
        DeliverEvent(0x81, 0x2); // 0xf4000001, 0x0004
+       DeliverEvent(0x81, ret); // 0xf4000001, 0x0004
 
        v0 = 1; pc0 = ra;
 }
@@ -2128,7 +2146,13 @@ void psxBios__card_write() { // 0x4e
 #ifdef PSXBIOS_LOG
        PSXBIOS_LOG("psxBios_%s: %x,%x,%x\n", biosB0n[0x4e], a0, a1, a2);
 #endif
-
+       /* Function also accepts sector 400h (a bug) */
+       if (!(a1 <= 0x400))
+       {
+               /* Invalid sectors */
+               v0 = 0; pc0 = ra;
+               return;
+       }
        card_active_chan = a0;
        port = a0 >> 4;
 
@@ -2155,7 +2179,13 @@ void psxBios__card_read() { // 0x4f
 #ifdef PSXBIOS_LOG
        PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x4f]);
 #endif
-
+       /* Function also accepts sector 400h (a bug) */
+       if (!(a1 <= 0x400))
+       {
+               /* Invalid sectors */
+               v0 = 0; pc0 = ra;
+               return;
+       }
        card_active_chan = a0;
        port = a0 >> 4;