+ 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);
+ psxCpu->Notify(R3000ACPU_NOTIFY_BEFORE_SAVE, NULL);
+
+ psxRegs.pc = pc;
+ psxRegs.GPR.n.gp = gp;
+ psxRegs.GPR.n.sp = sp ? sp : 0x801fff00;
+
+ psxCpu->Notify(R3000ACPU_NOTIFY_AFTER_LOAD, NULL);
+}
+
+void BiosBootBypass() {
+ assert(psxRegs.pc == 0x80030000);
+
+ // skip BIOS logos and region check
+ psxCpu->Notify(R3000ACPU_NOTIFY_BEFORE_SAVE, NULL);
+ psxRegs.pc = psxRegs.GPR.n.ra;