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HUC1’s RAM Enable only controls writing

This commit is contained in:
Lior Halphon 2017-02-23 00:27:08 +02:00
parent c5ce14dad1
commit a420cfd798
2 changed files with 4 additions and 2 deletions
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2
Core/mbc.c
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@ -5,7 +5,7 @@
const GB_cartridge_t GB_cart_defs[256] = {
// From http://gbdev.gg8.se/wiki/articles/The_Cartridge_Header#0147_-_Cartridge_Type
/* MBC SUBTYPE RAM BAT. RTC RUMB. EXTRA */
/* MBC SUBTYPE RAM BAT. RTC RUMB. */
{ GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 00h ROM ONLY
{ GB_MBC1 , GB_STANDARD_MBC, false, false, false, false}, // 01h MBC1
{ GB_MBC1 , GB_STANDARD_MBC, true , false, false, false}, // 02h MBC1+RAM

4
Core/memory.c
View File

@ -75,7 +75,9 @@ static uint8_t read_vram(GB_gameboy_t *gb, uint16_t addr)
static uint8_t read_mbc_ram(GB_gameboy_t *gb, uint16_t addr)
{
if ((!gb->mbc_ram_enable || !gb->mbc_ram_size) && gb->cartridge_type->mbc_subtype != GB_CAMERA) return 0xFF;
if ((!gb->mbc_ram_enable || !gb->mbc_ram_size) &&
gb->cartridge_type->mbc_subtype != GB_CAMERA &&
gb->cartridge_type->mbc_type != GB_HUC1) return 0xFF;
if (gb->cartridge_type->has_rtc && gb->mbc_ram_bank >= 8 && gb->mbc_ram_bank <= 0xC) {
/* RTC read */