GB: Fix GBC games running on GBA with BIOS GBC games can detect if they are running on a GBA by checking if the low bit of register B is set to 1. B is set in `GBSkipBIOS`, but B was not updated when loading a real BIOS. Load 1 into B after unmapping the BIOS if the model is set to GBA.
Douglas Christman DouglasChristman@gmail.com
Thu, 29 Mar 2018 11:11:18 +0800
1 files changed,
4 insertions(+),
0 deletions(-)
jump to
M
src/gb/gb.c
→
src/gb/gb.c
@@ -555,6 +555,10 @@ if (gb->memory.romBase < gb->memory.rom || gb->memory.romBase > &gb->memory.rom[gb->memory.romSize - 1]) {
free(gb->memory.romBase); gb->memory.romBase = gb->memory.rom; } + // XXX: Force AGB registers for AGB-mode + if (gb->model == GB_MODEL_AGB && gb->cpu->pc == 0x100) { + gb->cpu->b = 1; + } } void GBDetectModel(struct GB* gb) {