forked from sin365/AxibugEmuOnline
67 lines
1.5 KiB
C#
67 lines
1.5 KiB
C#
using System.IO;
|
|
|
|
namespace MyNes.Core
|
|
{
|
|
[BoardInfo("Unknown", 226)]
|
|
internal class Mapper226 : Board
|
|
{
|
|
private int prg_reg;
|
|
|
|
private bool prg_mode;
|
|
|
|
internal override void HardReset()
|
|
{
|
|
base.HardReset();
|
|
prg_reg = 0;
|
|
prg_mode = false;
|
|
}
|
|
|
|
internal override void WritePRG(ref ushort address, ref byte data)
|
|
{
|
|
switch (address & 0x8001)
|
|
{
|
|
case 32768:
|
|
prg_reg = (data & 0x1F) | ((data & 0x80) >> 2) | (prg_reg & 0xC0);
|
|
prg_mode = (data & 0x20) == 32;
|
|
Switch01KNMTFromMirroring(((data & 0x40) == 64) ? Mirroring.Vert : Mirroring.Horz);
|
|
if (prg_mode)
|
|
{
|
|
Switch16KPRG(prg_reg, PRGArea.Area8000);
|
|
Switch16KPRG(prg_reg, PRGArea.AreaC000);
|
|
}
|
|
else
|
|
{
|
|
Switch32KPRG(prg_reg >> 1, PRGArea.Area8000);
|
|
}
|
|
break;
|
|
case 32769:
|
|
prg_reg = ((data & 1) << 6) | (prg_reg & 0x3F);
|
|
if (prg_mode)
|
|
{
|
|
Switch16KPRG(prg_reg, PRGArea.Area8000);
|
|
Switch16KPRG(prg_reg, PRGArea.AreaC000);
|
|
}
|
|
else
|
|
{
|
|
Switch32KPRG(prg_reg >> 1, PRGArea.Area8000);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
internal override void WriteStateData(ref BinaryWriter stream)
|
|
{
|
|
base.WriteStateData(ref stream);
|
|
stream.Write(prg_reg);
|
|
stream.Write(prg_mode);
|
|
}
|
|
|
|
internal override void ReadStateData(ref BinaryReader stream)
|
|
{
|
|
base.ReadStateData(ref stream);
|
|
prg_reg = stream.ReadInt32();
|
|
prg_mode = stream.ReadBoolean();
|
|
}
|
|
}
|
|
}
|