frontend: pandora: work around r20a vs r21 versioning

[pcsx_rearmed.git] / libpcsxcore / r3000a.c

diff --git a/libpcsxcore/r3000a.c b/libpcsxcore/r3000a.c
index 1143b81..82eb885 100644 (file)
--- a/libpcsxcore/r3000a.c
+++ b/libpcsxcore/r3000a.c
@@ -48,8 +48,6 @@ int psxInit() {
 }
 
 void psxReset() {
-       psxCpu->Reset();
-
        psxMemReset();
 
        memset(&psxRegs, 0, sizeof(psxRegs));
@@ -59,6 +57,8 @@ void psxReset() {
        psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1
        psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
 
+       psxCpu->Reset();
+
        psxHwReset();
        psxBiosInit();
 
@@ -79,8 +79,17 @@ void psxShutdown() {
 }
 
 void psxException(u32 code, u32 bd) {
+       if (!Config.HLE && ((((psxRegs.code = PSXMu32(psxRegs.pc)) >> 24) & 0xfe) == 0x4a)) {
+               // "hokuto no ken" / "Crash Bandicot 2" ...
+               // BIOS does not allow to return to GTE instructions
+               // (just skips it, supposedly because it's scheduled already)
+               // so we execute it here
+               extern void (*psxCP2[64])(void *cp2regs);
+               psxCP2[psxRegs.code & 0x3f](&psxRegs.CP2D);
+       }
+
        // Set the Cause
-       psxRegs.CP0.n.Cause = code;
+       psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;
 
        // Set the EPC & PC
        if (bd) {
@@ -102,11 +111,6 @@ void psxException(u32 code, u32 bd) {
        psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) |
                                                  ((psxRegs.CP0.n.Status & 0xf) << 2);
 
-       if (!Config.HLE && (((PSXMu32(psxRegs.CP0.n.EPC) >> 24) & 0xfe) == 0x4a)) {
-               // "hokuto no ken" / "Crash Bandicot 2" ... fix
-               PSXMu32ref(psxRegs.CP0.n.EPC)&= SWAPu32(~0x02000000);
-       }
-
        if (Config.HLE) psxBiosException();
 }
 
@@ -181,6 +185,12 @@ void psxBranchTest() {
                                cdrLidSeekInterrupt();
                        }
                }
+               if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update
+                       if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) {
+                               psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE);
+                               spuUpdate();
+                       }
+               }
        }
 
        if (psxHu32(0x1070) & psxHu32(0x1074)) {