X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=pcsx_rearmed.git;a=blobdiff_plain;f=libpcsxcore%2Fpsxbios.c;h=775fba7ed057ce0a75447d8b1cc5ced84835ebe5;hp=265dbfd329417756abbd8719919594f76fcb8d79;hb=cd1ea24508e604743ad8d9c67199510c7498ef29;hpb=76b81516963f0f50049be59172c651b559d9fabf

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 265dbfd3..775fba7e 100644
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -1191,7 +1191,7 @@ void psxBios_sys_a0_4c() { // 0x4c GPU relate
 	GPU_writeData(0x0400000);
 	GPU_writeData(0x0200000);
 	GPU_writeData(0x0100000);
-
+	v0 = 0x1f801814;
 	pc0 = ra;
 }
 
@@ -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;
 
@@ -2895,8 +2907,9 @@ void psxBiosException() {
 #endif
 			switch (a0) {
 				case 1: // EnterCritical - disable irq's
-					psxRegs.CP0.n.Status &= ~0x404; 
-v0=1;	// HDHOSHY experimental patch: Spongebob, Coldblood, fearEffect, Medievil2, Martian Gothic
+					/* Fixes Medievil 2 not loading up new game, Digimon World not booting up and possibly others */
+					v0 = (psxRegs.CP0.n.Status & 0x404) == 0x404;
+					psxRegs.CP0.n.Status &= ~0x404;
 					break;
 
 				case 2: // ExitCritical - enable irq's