forked from sin365/AxibugEmuOnline
34 lines
1.1 KiB
C#
34 lines
1.1 KiB
C#
|
namespace AxibugEmuOnline.Client.UNES.Mapper
|
|||
|
|
{
|
|||
|
|
[MapperDef(Id = 9, Description = "Mike Tyson's Punch-Out!!")]
|
|||
|
|
public class MMC2 : MMC4
|
|||
|
|
{
|
|||
|
|
public MMC2(Emulator emulator) : base(emulator)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public override void InitializeMemoryMap(CPU cpu)
|
|||
|
|
{
|
|||
|
|
base.InitializeMemoryMap(cpu);
|
|||
|
|
|
|||
|
|
cpu.MapReadHandler(0x8000, 0xBFFF, address => _prgROM[_prgBankOffset + (address - 0x8000)]);
|
|||
|
|
cpu.MapReadHandler(0xA000, 0xFFFF, address => _prgROM[_prgROM.Length - 0x4000 - 0x2000 + (address - 0xA000)]);
|
|||
|
|
|
|||
|
|
cpu.MapWriteHandler(0xA000, 0xAFFF, (address, val) => _prgBankOffset = (val & 0xF) * 0x2000);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected override void GetLatch(uint address, out uint latch, out bool? on)
|
|||
|
|
{
|
|||
|
|
base.GetLatch(address, out latch, out on);
|
|||
|
|
|
|||
|
|
// For MMC2, only 0xFD8 and 0xFE8 trigger the latch,
|
|||
|
|
// not the whole range like in MMC4
|
|||
|
|
if (latch == 0 && (address & 0x3) != 0)
|
|||
|
|
{
|
|||
|
|
on = null;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|