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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.
This commit is contained in:
Douglas Christman 2018-03-29 11:11:18 +08:00 committed by endrift
parent f28e20d4aa
commit 36de596fdb
1 changed files with 4 additions and 0 deletions
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4
src/gb/gb.c
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@ -555,6 +555,10 @@ void GBUnmapBIOS(struct GB* gb) {
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) {