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GB: Fix GBC game registers after skipping BIOS

This commit is contained in:
Vicki Pfau 2020-05-13 01:41:02 -07:00
parent 46860b40e6
commit f33593537b
2 changed files with 10 additions and 2 deletions
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1
CHANGES
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@ -5,6 +5,7 @@ Features:
Emulation fixes:
- ARM: Fix ALU reading PC after shifting
- ARM: Fix STR storing PC after address calculation
- GB: Fix GBC game registers after skipping BIOS
- GBA: Add missing RTC overrides for Legendz games
- GBA BIOS: Implement dummy sound driver calls
- GBA BIOS: Improve HLE BIOS timing

11
src/gb/gb.c
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@ -478,6 +478,7 @@ void GBReset(struct SM83Core* cpu) {
void GBSkipBIOS(struct GB* gb) {
struct SM83Core* cpu = gb->cpu;
const struct GBCartridge* cart = (const struct GBCartridge*) &gb->memory.rom[0x100];
int nextDiv = 0;
switch (gb->model) {
@ -539,9 +540,15 @@ void GBSkipBIOS(struct GB* gb) {
cpu->a = 0x11;
cpu->f.packed = 0x80;
cpu->c = 0;
cpu->e = 0x08;
cpu->h = 0;
cpu->l = 0x7C;
if (cart->cgb & 0x80) {
cpu->d = 0xFF;
cpu->e = 0x56;
cpu->l = 0x0D;
} else {
cpu->e = 0x08;
cpu->l = 0x7C;
}
gb->timer.internalDiv = 0x1EA;
nextDiv = 0xC;
break;