AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper232.cs

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2024-08-03 22:26:53 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper232 Quattro Games //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using BYTE = System.Byte;
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namespace VirtualNes.Core
{
public class Mapper232 : Mapper
{
BYTE[] reg = new byte[2];
public Mapper232(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
reg[0] = 0x0C;
reg[1] = 0x00;
}
//void Mapper232::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
if (addr >= 0x6000)
{
Write(addr, data);
}
}
//void Mapper232::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
// if( addr == 0x9000 ) {
// reg[0] = (data & 0x18)>>1;
// } else if( addr >= 0xA000 && addr <= 0xFFFF ) {
// reg[1] = data & 0x03;
// }
if (addr <= 0x9FFF)
{
reg[0] = (byte)((data & 0x18) >> 1);
}
else
{
reg[1] = (byte)(data & 0x03);
}
SetPROM_8K_Bank(4, (reg[0] | reg[1]) * 2 + 0);
SetPROM_8K_Bank(5, (reg[0] | reg[1]) * 2 + 1);
SetPROM_8K_Bank(6, (reg[0] | 0x03) * 2 + 0);
SetPROM_8K_Bank(7, (reg[0] | 0x03) * 2 + 1);
}
public override bool IsStateSave()
{
return true;
}
//void Mapper232::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg[0];
p[1] = reg[1];
}
//void Mapper232::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg[0] = p[0];
reg[1] = p[1];
}
}
}