AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper041.cs

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2024-08-05 01:33:07 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper041 Caltron 6-in-1 //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper041 : Mapper
{
BYTE[] reg = new byte[2];
public Mapper041(NES parent) : base(parent)
{
}
public override void Reset()
{
reg[0] = reg[1] = 0;
SetPROM_32K_Bank(0, 1, 2, 3);
if (VROM_1K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
}
//void Mapper041::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
if (addr >= 0x6000 && addr < 0x6800)
{
SetPROM_32K_Bank(addr & 0x07);
reg[0] = (byte)(addr & 0x04);
reg[1] &= 0x03;
reg[1] |= (byte)((addr >> 1) & 0x0C);
SetVROM_8K_Bank(reg[1]);
if ((addr & 0x20) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
}
}
//void Mapper041::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
if (reg[0] != 0)
{
reg[1] &= 0x0C;
reg[1] |= (byte)(addr & 0x03);
SetVROM_8K_Bank(reg[1]);
}
}
//void Mapper041::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg[0];
p[1] = reg[1];
}
//void Mapper041::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg[0] = p[0];
reg[1] = p[1];
}
public override bool IsStateSave()
{
return true;
}
}
}