psxbios: try to improve initial boot state

[pcsx_rearmed.git] / libpcsxcore / misc.c

diff --git a/libpcsxcore/misc.c b/libpcsxcore/misc.c
index bba81b1..ab3e1a4 100644 (file)
--- a/libpcsxcore/misc.c
+++ b/libpcsxcore/misc.c
@@ -144,30 +144,6 @@ int GetCdromFile(u8 *mdir, u8 *time, char *filename) {
        return retval;
 }
 
-static const unsigned int gpu_ctl_def[] = {
-       0x00000000, 0x01000000, 0x03000000, 0x04000000,
-       0x05000800, 0x06c60260, 0x0703fc10, 0x08000027,
-};
-
-static const unsigned int gpu_data_def[] = {
-       0xe100360b, 0xe2000000, 0xe3000800, 0xe4077e7f,
-       0xe5001000, 0xe6000000,
-       0x02000000, 0x00000000, 0x01ff03ff,
-};
-
-void BiosLikeGPUSetup()
-{
-       int i;
-
-       for (i = 0; i < sizeof(gpu_ctl_def) / sizeof(gpu_ctl_def[0]); i++)
-               GPU_writeStatus(gpu_ctl_def[i]);
-
-       for (i = 0; i < sizeof(gpu_data_def) / sizeof(gpu_data_def[0]); i++)
-               GPU_writeData(gpu_data_def[i]);
-
-       HW_GPU_STATUS |= SWAP32(PSXGPU_nBUSY);
-}
-
 static void SetBootRegs(u32 pc, u32 gp, u32 sp)
 {
        //printf("%s %08x %08x %08x\n", __func__, pc, gp, sp);
@@ -176,6 +152,10 @@ static void SetBootRegs(u32 pc, u32 gp, u32 sp)
        psxRegs.pc = pc;
        psxRegs.GPR.n.gp = gp;
        psxRegs.GPR.n.sp = sp ? sp : 0x801fff00;
+       psxRegs.GPR.n.fp = psxRegs.GPR.n.sp;
+
+       psxRegs.GPR.n.t0 = psxRegs.GPR.n.sp; // mimic A(43)
+       psxRegs.GPR.n.t3 = pc;
 
        psxCpu->Notify(R3000ACPU_NOTIFY_AFTER_LOAD, NULL);
 }
@@ -271,7 +251,7 @@ int LoadCdrom() {
 
        memcpy(&tmpHead, buf + 12, sizeof(EXE_HEADER));
 
-       SysPrintf("manual booting '%s'\n", exename);
+       SysPrintf("manual booting '%s' pc=%x\n", exename, SWAP32(tmpHead.pc0));
        sp = SWAP32(tmpHead.s_addr);
        if (cnf_stack)
                sp = cnf_stack;