diff options
| -rw-r--r-- | libpcsxcore/psxbios.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c index 265dbfd..d4a38e1 100644 --- a/libpcsxcore/psxbios.c +++ b/libpcsxcore/psxbios.c @@ -2146,7 +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; @@ -2173,7 +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; |