X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libpcsxcore%2Fpsxmem.c;h=171104cb37c736d4c8d7f17448f5f8e57539c3e0;hb=943a507a4156b8f5b00e4431152e41eeb4dc6f3d;hp=3caf889ba41ba1681319b9e47d5cabfaf4a96587;hpb=41e82ad46e60f9c3291ff81ebe4a07512b1194c5;p=pcsx_rearmed.git diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c index 3caf889b..171104cb 100644 --- a/libpcsxcore/psxmem.c +++ b/libpcsxcore/psxmem.c @@ -176,7 +176,11 @@ int psxMemInit() { memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); - psxMemWLUT[0x1f00] = (u8 *)psxP; + // Don't allow writes to PIO Expansion region (psxP) to take effect. + // NOTE: Not sure if this is needed to fix any games but seems wise, + // seeing as some games do read from PIO as part of copy-protection + // check. (See fix in psxMemReset() regarding psxP region reads). + psxMemWLUT[0x1f00] = NULL; psxMemWLUT[0x1f80] = (u8 *)psxH; return 0; @@ -236,7 +240,7 @@ u8 psxMemRead8(u32 mem) { #ifdef PSXMEM_LOG PSXMEM_LOG("err lb %8.8lx\n", mem); #endif - return 0; + return 0xFF; } } } @@ -261,7 +265,7 @@ u16 psxMemRead16(u32 mem) { #ifdef PSXMEM_LOG PSXMEM_LOG("err lh %8.8lx\n", mem); #endif - return 0; + return 0xFFFF; } } } @@ -286,7 +290,7 @@ u32 psxMemRead32(u32 mem) { #ifdef PSXMEM_LOG if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } #endif - return 0; + return 0xFFFFFFFF; } } }