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BIOS: Turn display on with fast boot

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Fixes black screen in SaGa Frontier with fast boot disabled.
This commit is contained in:
Connor McLaughlin 2020-11-10 21:35:03 +10:00
parent d468814a6d
commit 6cd991bc57
2 changed files with 7 additions and 4 deletions
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7
src/core/bios.cpp
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@ -189,8 +189,11 @@ bool PatchBIOSFastBoot(u8* image, u32 image_size, const Hash& hash)
// Replace the shell entry point with a return back to the bootstrap.
Log_InfoPrintf("Patching BIOS to skip intro");
PatchBIOS(image, image_size, 0x1FC18000, 0x03E00008);
PatchBIOS(image, image_size, 0x1FC18004, 0x00000000);
PatchBIOS(image, image_size, 0x1FC18000, 0x3C011F80); // lui at, 1f80
PatchBIOS(image, image_size, 0x1FC18004, 0x3C0A0300); // lui t2, 0300h
PatchBIOS(image, image_size, 0x1FC18008, 0xAC2A1814); // sw zero, 1814h(at) ; turn the display on
PatchBIOS(image, image_size, 0x1FC1800C, 0x03E00008); // jr ra
PatchBIOS(image, image_size, 0x1FC18010, 0x00000000); // nop
return true;
}

4
src/core/cpu_core.cpp
View file

@ -483,9 +483,9 @@ restart_instruction:
const Instruction inst = g_state.current_instruction;
#if 0
if (g_state.m_current_instruction_pc == 0x80010000)
if (g_state.current_instruction_pc == 0x80030000)
{
LOG_EXECUTION = true;
TRACE_EXECUTION = true;
__debugbreak();
}
#endif