58 lines
1.0 KiB
C#
58 lines
1.0 KiB
C#
using BizHawk.Common;
|
|
|
|
namespace BizHawk.Emulation.Cores.Nintendo.NES
|
|
{
|
|
internal sealed class Mapper188 : NesBoardBase
|
|
{
|
|
// config
|
|
int prg_16k_mask;
|
|
// state
|
|
int prg;
|
|
|
|
public override bool Configure(EDetectionOrigin origin)
|
|
{
|
|
switch (Cart.BoardType)
|
|
{
|
|
case "MAPPER188":
|
|
AssertVram(8);
|
|
AssertChr(0);
|
|
AssertPrg(128, 256);
|
|
Cart.WramSize = 0;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
SetMirrorType(Cart.PadH, Cart.PadV);
|
|
prg_16k_mask = Cart.PrgSize / 16 - 1;
|
|
return true;
|
|
}
|
|
|
|
public override void WritePrg(int addr, byte value)
|
|
{
|
|
prg = value;
|
|
}
|
|
|
|
public override void SyncState(Serializer ser)
|
|
{
|
|
ser.Sync(nameof(prg), ref prg);
|
|
base.SyncState(ser);
|
|
}
|
|
|
|
public override byte ReadPrg(int addr)
|
|
{
|
|
int bank = prg;
|
|
if (addr >= 0x4000)
|
|
bank = 15;
|
|
bank ^= 8; // bad dumps?
|
|
bank &= prg_16k_mask;
|
|
return Rom[addr & 0x3fff | bank << 14];
|
|
}
|
|
|
|
public override byte ReadWram(int addr)
|
|
{
|
|
return 3;
|
|
}
|
|
}
|
|
}
|