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Better hueristics for wrong MBC type

This commit is contained in:
Lior Halphon 2020-04-25 23:18:03 +03:00
parent 0534b091a5
commit d1e3ad7790
1 changed files with 3 additions and 3 deletions
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6
Core/gb.c
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@ -484,13 +484,13 @@ done:;
// Fix a common wrong MBC error
if (gb->rom[0x147] == 3) { // MBC1 + RAM + Battery
if (gb->rom_size == 64 * 0x4000) {
for (unsigned i = 63 * 0x4000; i < 64 * 0x4000; i++) {
if (gb->rom_size >= 33 * 0x4000) {
for (unsigned i = 32 * 0x4000; i < 33 * 0x4000; i++) {
if (gb->rom[i]) {
gb->rom[0x147] = 0x10; // MBC3 + RTC + RAM + Battery
GB_configure_cart(gb);
gb->rom[0x147] = 0x3;
GB_log(gb, "ROM uses MBC1 but appears to use all 64 banks, assuming MBC3\n");
GB_log(gb, "ROM claims to use MBC1 but appears to require MBC3 or 5, assuming MBC3.\n");
break;
}
}