82 lines
2.1 KiB
C#
82 lines
2.1 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper232 Quattro Games //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using static VirtualNes.Core.CPU;
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using INT = System.Int32;
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using BYTE = System.Byte;
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using System;
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using Codice.CM.Client.Differences;
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namespace VirtualNes.Core
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{
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public class Mapper232 : Mapper
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{
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BYTE[] reg = new byte[2];
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public Mapper232(NES parent) : base(parent)
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{
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}
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public override void Reset()
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{
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SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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reg[0] = 0x0C;
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reg[1] = 0x00;
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}
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//void Mapper232::WriteLow(WORD addr, BYTE data)
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public override void WriteLow(ushort addr, byte data)
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{
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if (addr >= 0x6000)
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{
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Write(addr, data);
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}
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}
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//void Mapper232::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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// if( addr == 0x9000 ) {
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// reg[0] = (data & 0x18)>>1;
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// } else if( addr >= 0xA000 && addr <= 0xFFFF ) {
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// reg[1] = data & 0x03;
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// }
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if (addr <= 0x9FFF)
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{
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reg[0] = (byte)((data & 0x18) >> 1);
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}
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else
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{
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reg[1] = (byte)(data & 0x03);
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}
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SetPROM_8K_Bank(4, (reg[0] | reg[1]) * 2 + 0);
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SetPROM_8K_Bank(5, (reg[0] | reg[1]) * 2 + 1);
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SetPROM_8K_Bank(6, (reg[0] | 0x03) * 2 + 0);
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SetPROM_8K_Bank(7, (reg[0] | 0x03) * 2 + 1);
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}
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public override bool IsStateSave()
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{
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return true;
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}
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//void Mapper232::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg[0];
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p[1] = reg[1];
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}
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//void Mapper232::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg[0] = p[0];
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reg[1] = p[1];
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}
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}
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}
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