AxibugEmuOnline/AxibugEmuOnline.Client.Transplant/Assets/VirtualNes.Core/Mapper/Mapper075.cs

88 lines
2.4 KiB
C#
Raw Normal View History

//////////////////////////////////////////////////////////////////////////
// Mapper075 Konami VRC1/Jaleco D65005 //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using BYTE = System.Byte;
namespace VirtualNes.Core
{
public class Mapper075 : Mapper
{
BYTE[] reg = new byte[2];
public Mapper075(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
if (VROM_8K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
reg[0] = 0;
reg[1] = 1;
}
//void Mapper075::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr & 0xF000)
{
case 0x8000:
SetPROM_8K_Bank(4, data);
break;
case 0x9000:
if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
reg[0] = (byte)((reg[0] & 0x0F) | ((data & 0x02) << 3));
reg[1] = (byte)((reg[1] & 0x0F) | ((data & 0x04) << 2));
SetVROM_4K_Bank(0, reg[0]);
SetVROM_4K_Bank(4, reg[1]);
break;
case 0xA000:
SetPROM_8K_Bank(5, data);
break;
case 0xC000:
SetPROM_8K_Bank(6, data);
break;
case 0xE000:
reg[0] = (byte)((reg[0] & 0x10) | (data & 0x0F));
SetVROM_4K_Bank(0, reg[0]);
break;
case 0xF000:
reg[1] = (byte)((reg[1] & 0x10) | (data & 0x0F));
SetVROM_4K_Bank(4, reg[1]);
break;
}
}
//void Mapper075::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg[0];
p[1] = reg[1];
}
//void Mapper075::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg[0] = p[0];
reg[1] = p[1];
}
public override bool IsStateSave()
{
return true;
}
}
}