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Update mbc.c 

6a3cd371d0
This commit is contained in:
Kawa 2020-06-03 20:44:27 +02:00
parent 30e274953a
commit b98ce40021
1 changed files with 6 additions and 3 deletions
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9
bsnes/gb/Core/mbc.c
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@ -114,7 +114,7 @@ void GB_update_mbc_mappings(GB_gameboy_t *gb)
void GB_configure_cart(GB_gameboy_t *gb)
{
gb->cartridge_type = &GB_cart_defs[gb->rom[0x147]];
if (gb->rom[0x147] == 0 && gb->rom_size > 0x8000) {
GB_log(gb, "ROM header reports no MBC, but file size is over 32Kb. Assuming cartridge uses MBC3.\n");
gb->cartridge_type = &GB_cart_defs[0x11];
@ -131,7 +131,10 @@ void GB_configure_cart(GB_gameboy_t *gb)
static const int ram_sizes[256] = {0, 0x800, 0x2000, 0x8000, 0x20000, 0x10000};
gb->mbc_ram_size = ram_sizes[gb->rom[0x149]];
}
gb->mbc_ram = malloc(gb->mbc_ram_size);
if (gb->mbc_ram_size) {
gb->mbc_ram = malloc(gb->mbc_ram_size);
}
/* Todo: Some games assume unintialized MBC RAM is 0xFF. It this true for all cartridges types? */
memset(gb->mbc_ram, 0xFF, gb->mbc_ram_size);
@ -146,7 +149,7 @@ void GB_configure_cart(GB_gameboy_t *gb)
gb->mbc1_wiring = GB_MBC1M_WIRING;
}
}
/* Set MBC5's bank to 1 correctly */
if (gb->cartridge_type->mbc_type == GB_MBC5) {
gb->mbc5.rom_bank_low = 1;