X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libpcsxcore%2Fpsxmem.c;h=171104cb37c736d4c8d7f17448f5f8e57539c3e0;hb=c9c7a925d158284eb3febf3cccc9789e94231430;hp=a1a641df1a441ad5ac532c687b5fe30bbce202ec;hpb=8a55ebcc07d4f860633db8c77bb9e16bcfa03313;p=pcsx_rearmed.git

diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c
index a1a641df..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;
 		}
 	}
 }
@@ -307,7 +311,7 @@ void psxMemWrite8(u32 mem, u8 value) {
 			if (Config.Debug)
 				DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 			*(u8 *)(p + (mem & 0xffff)) = value;
-#ifdef PSXREC
+#ifndef DRC_DISABLE
 			psxCpu->Clear((mem & (~3)), 1);
 #endif
 		} else {
@@ -334,7 +338,7 @@ void psxMemWrite16(u32 mem, u16 value) {
 			if (Config.Debug)
 				DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 			*(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
-#ifdef PSXREC
+#ifndef DRC_DISABLE
 			psxCpu->Clear((mem & (~3)), 1);
 #endif
 		} else {
@@ -362,12 +366,12 @@ void psxMemWrite32(u32 mem, u32 value) {
 			if (Config.Debug)
 				DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 			*(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
-#ifdef PSXREC
+#ifndef DRC_DISABLE
 			psxCpu->Clear(mem, 1);
 #endif
 		} else {
 			if (mem != 0xfffe0130) {
-#ifdef PSXREC
+#ifndef DRC_DISABLE
 				if (!writeok)
 					psxCpu->Clear(mem, 1);
 #endif