55 lines
1.2 KiB
C#
55 lines
1.2 KiB
C#
namespace BizHawk.Emulation.Cores.Nintendo.NES
|
|
{
|
|
// sachen
|
|
// NROM plus random copy protection circuit
|
|
|
|
// dancing blocks refuses to run; see comments below
|
|
public sealed class Mapper143 : NES.NESBoardBase
|
|
{
|
|
public override bool Configure(NES.EDetectionOrigin origin)
|
|
{
|
|
switch (Cart.board_type)
|
|
{
|
|
case "MAPPER143":
|
|
case "UNIF_UNL-SA-NROM":
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
AssertPrg(32);
|
|
AssertChr(8);
|
|
SetMirrorType(Cart.pad_h, Cart.pad_v);
|
|
return true;
|
|
}
|
|
|
|
public override byte ReadEXP(int addr)
|
|
{
|
|
if ((addr & 0x100) != 0)
|
|
return (byte)(NES.DB & 0xc0 | ~addr & 0x3f);
|
|
else
|
|
return NES.DB;
|
|
}
|
|
|
|
/* if this awful hack is uncommented, dancing blocks runs
|
|
it initializes ram to a different pseudo-random pattern
|
|
|
|
bool first = true;
|
|
public override void ClockPPU()
|
|
{
|
|
if (first)
|
|
{
|
|
first = false;
|
|
for (int i = 0; i < 0x800; i++)
|
|
NES.WriteMemory((ushort)i, (i & 4) != 0 ? (byte)0x7f : (byte)0x00);
|
|
}
|
|
}
|
|
|
|
public override void SyncState(Serializer ser)
|
|
{
|
|
base.SyncState(ser);
|
|
ser.Sync("first", ref first);
|
|
}
|
|
*/
|
|
}
|
|
}
|