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GB: Add support for 4MB MBC30

This commit is contained in:
negativeExponent 2020-08-14 18:55:03 +08:00
parent 6b70aa5de5
commit 86fcffefd0
1 changed files with 3 additions and 1 deletions
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4
src/gb/gbMemory.cpp
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@ -362,7 +362,9 @@ void mapperMBC3ROM(uint16_t address, uint8_t value)
gbDataMBC3.mapperRAMEnable = ((value & 0x0a) == 0x0a ? 1 : 0);
break;
case 0x2000: // ROM bank select
value = value & 0x7f;
// MBC3 has 2MB rom size, anything above that is a 4MB MBC30
if (gbRomSize < 0x200000)
value &= 0x7f;
if (value == 0)
value = 1;
if (value == gbDataMBC3.mapperROMBank)