forked from sin365/AxibugEmuOnline
84 lines
2.5 KiB
C#
84 lines
2.5 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper133 SACHEN CHEN //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
using static VirtualNes.MMU;
|
|
using BYTE = System.Byte;
|
|
|
|
|
|
namespace VirtualNes.Core
|
|
{
|
|
public class Mapper134 : Mapper
|
|
{
|
|
BYTE cmd, prg, chr;
|
|
public Mapper134(NES parent) : base(parent)
|
|
{
|
|
}
|
|
|
|
public override void Reset()
|
|
|
|
{
|
|
SetPROM_32K_Bank(0);
|
|
// SetPROM_16K_Bank( 6, 0 );
|
|
// SetPROM_16K_Bank( 6, 1 );
|
|
SetVROM_8K_Bank(0);
|
|
}
|
|
|
|
//void Mapper134::WriteLow(WORD addr, BYTE data)
|
|
public override void WriteLow(ushort addr, byte data)
|
|
{
|
|
switch (addr & 0x4101)
|
|
{
|
|
case 0x4100:
|
|
cmd = (byte)(data & 0x07);
|
|
break;
|
|
case 0x4101:
|
|
switch (cmd)
|
|
{
|
|
case 0:
|
|
prg = 0;
|
|
chr = 3;
|
|
break;
|
|
case 4:
|
|
chr &= 0x3;
|
|
chr |= (byte)((data & 0x07) << 2);
|
|
break;
|
|
case 5:
|
|
prg = (byte)(data & 0x07);
|
|
break;
|
|
case 6:
|
|
chr &= 0x1C;
|
|
chr |= (byte)(data & 0x3);
|
|
break;
|
|
case 7:
|
|
if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
|
|
else SetVRAM_Mirror(VRAM_VMIRROR);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
SetPROM_32K_Bank(prg);
|
|
// SetPROM_16K_Bank( 4, (prg<<1)|0 );
|
|
// SetPROM_16K_Bank( 6, (prg<<1)|1 );
|
|
SetVROM_8K_Bank(chr);
|
|
CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
|
|
}
|
|
|
|
//void Mapper134::SaveState(LPBYTE p)
|
|
public override void SaveState(byte[] p)
|
|
{
|
|
p[0] = cmd;
|
|
p[1] = prg;
|
|
p[2] = chr;
|
|
}
|
|
|
|
//void Mapper134::LoadState(LPBYTE p)
|
|
public override void LoadState(byte[] p)
|
|
{
|
|
cmd = p[0];
|
|
prg = p[1];
|
|
chr = p[2];
|
|
}
|
|
|
|
}
|
|
}
|