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GB: Support loading CGB-on-AGB boot ROM

This commit is contained in:
Vicki Pfau 2021-03-23 19:35:39 -07:00
parent 2aa3ec022a
commit d9a3d4a251
2 changed files with 10 additions and 4 deletions
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1
CHANGES
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@ -125,6 +125,7 @@ Misc:
- GB: Allow pausing event loop while CPU is blocked
- GB: Add support for sleep and shutdown callbacks
- GB: Redo double speed emulation (closes mgba.io/i/1515)
- GB: Support loading CGB-on-AGB boot ROM
- GB Audio: Add channel 4 batching back (fixes mgba.io/i/1313)
- GB Core: Return the current number of banks for ROM/SRAM, not theoretical max
- GB I/O: Implement preliminary support for PCM12/PCM34 (closes mgba.io/i/1468)

13
src/gb/gb.c
View File

@ -26,12 +26,13 @@ const uint32_t GB_COMPONENT_MAGIC = 0x400000;
static const uint8_t _knownHeader[4] = { 0xCE, 0xED, 0x66, 0x66};
#define DMG_BIOS_CHECKSUM 0xC2F5CC97
#define DMG_2_BIOS_CHECKSUM 0x59C8598E
#define DMG0_BIOS_CHECKSUM 0xC2F5CC97
#define DMG_BIOS_CHECKSUM 0x59C8598E
#define MGB_BIOS_CHECKSUM 0xE6920754
#define SGB_BIOS_CHECKSUM 0xEC8A83B9
#define SGB2_BIOS_CHECKSUM 0X53D0DD63
#define CGB_BIOS_CHECKSUM 0x41884E46
#define AGB_BIOS_CHECKSUM 0xFFD6B0F1
mLOG_DEFINE_CATEGORY(GB, "GB", "gb");
@ -414,11 +415,12 @@ static uint32_t _GBBiosCRC32(struct VFile* vf) {
bool GBIsBIOS(struct VFile* vf) {
switch (_GBBiosCRC32(vf)) {
case DMG_BIOS_CHECKSUM:
case DMG_2_BIOS_CHECKSUM:
case DMG0_BIOS_CHECKSUM:
case MGB_BIOS_CHECKSUM:
case SGB_BIOS_CHECKSUM:
case SGB2_BIOS_CHECKSUM:
case CGB_BIOS_CHECKSUM:
case AGB_BIOS_CHECKSUM:
return true;
default:
return false;
@ -623,7 +625,7 @@ void GBDetectModel(struct GB* gb) {
if (gb->biosVf) {
switch (_GBBiosCRC32(gb->biosVf)) {
case DMG_BIOS_CHECKSUM:
case DMG_2_BIOS_CHECKSUM:
case DMG0_BIOS_CHECKSUM:
gb->model = GB_MODEL_DMG;
break;
case MGB_BIOS_CHECKSUM:
@ -638,6 +640,9 @@ void GBDetectModel(struct GB* gb) {
case CGB_BIOS_CHECKSUM:
gb->model = GB_MODEL_CGB;
break;
case AGB_BIOS_CHECKSUM:
gb->model = GB_MODEL_AGB;
break;
default:
gb->biosVf->close(gb->biosVf);
gb->biosVf = NULL;