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Atari - implement mapper F4

This commit is contained in:
adelikat 2012-04-01 21:00:32 +00:00
parent 59f92b4c81
commit a22a2fa3dc
1 changed files with 32 additions and 0 deletions
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32
BizHawk.Emulation/Consoles/Atari/2600/Mappers/mF4.cs
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@ -7,5 +7,37 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
{
class mF4 :MapperBase
{
int toggle = 0;
public override byte ReadMemory(ushort addr)
{
Address(addr);
if (addr < 0x1000) return base.ReadMemory(addr);
return core.rom[toggle * 4 * 1024 + (addr & 0xFFF)];
}
public override void WriteMemory(ushort addr, byte value)
{
Address(addr);
if (addr < 0x1000) base.WriteMemory(addr, value);
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("toggle", ref toggle);
}
void Address(ushort addr)
{
if (addr == 0x1FF4) toggle = 0;
if (addr == 0x1FF5) toggle = 1;
if (addr == 0x1FF6) toggle = 2;
if (addr == 0x1FF7) toggle = 3;
if (addr == 0x1FF8) toggle = 4;
if (addr == 0x1FF9) toggle = 5;
if (addr == 0x1FF9) toggle = 5;
if (addr == 0x1FFA) toggle = 6;
if (addr == 0x1FFB) toggle = 7;
}
}
}