88 lines
1.7 KiB
C#
88 lines
1.7 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper110 //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
using static VirtualNes.MMU;
|
|
using static VirtualNes.Core.CPU;
|
|
using INT = System.Int32;
|
|
using BYTE = System.Byte;
|
|
using System;
|
|
using Codice.CM.Client.Differences;
|
|
|
|
namespace VirtualNes.Core
|
|
{
|
|
public class Mapper110 : Mapper
|
|
{
|
|
BYTE reg0, reg1;
|
|
public Mapper110(NES parent) : base(parent)
|
|
{
|
|
}
|
|
|
|
public override void Reset()
|
|
{
|
|
SetPROM_32K_Bank(0);
|
|
SetVROM_8K_Bank(0);
|
|
|
|
reg0 = 0;
|
|
reg1 = 0;
|
|
}
|
|
//void Mapper110::WriteLow(WORD addr, BYTE data)
|
|
public override void WriteLow(ushort addr, byte data)
|
|
{
|
|
switch (addr)
|
|
{
|
|
case 0x4100:
|
|
reg1 = (byte)(data & 0x07);
|
|
break;
|
|
case 0x4101:
|
|
switch (reg1)
|
|
{
|
|
case 5:
|
|
SetPROM_32K_Bank(data);
|
|
break;
|
|
case 0:
|
|
reg0 = (byte)(data & 0x01);
|
|
SetVROM_8K_Bank(reg0);
|
|
break;
|
|
case 2:
|
|
reg0 = data;
|
|
SetVROM_8K_Bank(reg0);
|
|
break;
|
|
case 4:
|
|
reg0 = (byte)(reg0 | (data << 1));
|
|
SetVROM_8K_Bank(reg0);
|
|
break;
|
|
case 6:
|
|
reg0 = (byte)(reg0 | (data << 2));
|
|
SetVROM_8K_Bank(reg0);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
//void Mapper110::SaveState(LPBYTE p)
|
|
public override void SaveState(byte[] p)
|
|
{
|
|
p[0] = reg0;
|
|
p[1] = reg1;
|
|
}
|
|
|
|
//void Mapper110::LoadState(LPBYTE p)
|
|
public override void LoadState(byte[] p)
|
|
{
|
|
reg0 = p[0];
|
|
reg1 = p[1];
|
|
}
|
|
|
|
public override bool IsStateSave()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
}
|
|
}
|