89 lines
1.7 KiB
C#
89 lines
1.7 KiB
C#
using System.Collections.Generic;
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using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Computers.Commodore64.Cartridge
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{
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internal sealed class Mapper0007 : CartridgeDevice
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{
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private readonly int[,] _banks = new int[16, 0x2000];
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private int _bankNumber;
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private bool _disabled;
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// Fun Play mapper
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// bank switching is done from DE00
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public Mapper0007(IList<int[]> newData, bool game, bool exrom)
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{
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pinGame = game;
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pinExRom = exrom;
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_disabled = false;
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// load data into the banks from the list
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for (var j = 0; j < 16; j++)
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{
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for (var i = 0; i < 0x2000; i++)
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{
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_banks[j, i] = newData[j][i];
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}
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}
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_bankNumber = 0;
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}
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protected override void SyncStateInternal(Serializer ser)
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{
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ser.Sync("BankNumber", ref _bankNumber);
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ser.Sync("Disabled", ref _disabled);
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}
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public override int Peek8000(int addr)
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{
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if (!_disabled)
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{
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return _banks[_bankNumber, addr];
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}
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return base.Read8000(addr);
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}
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public override void PokeDE00(int addr, int val)
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{
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if (addr == 0)
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{
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byte tempBank = (byte)((val & 0x1) << 3);
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tempBank |= (byte)((val & 0x38) >> 3);
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_bankNumber = tempBank;
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if (val == 0x86)
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{
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_disabled = true;
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}
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}
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}
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public override int Read8000(int addr)
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{
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if (!_disabled)
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{
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return _banks[_bankNumber, addr];
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}
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return base.Read8000(addr);
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}
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public override void WriteDE00(int addr, int val)
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{
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if (addr == 0)
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{
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byte tempBank = (byte)((val & 0x1) << 3);
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tempBank |= (byte)((val & 0x38) >> 3);
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_bankNumber = tempBank;
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if (val == 0x86)
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{
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_disabled = true;
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}
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}
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}
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}
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}
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