57 lines
1.0 KiB
C#
57 lines
1.0 KiB
C#
using System.Linq;
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using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Atari.Atari2600
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{
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/*
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Mapper used for multi-cart 2K games
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*/
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internal class Multicart2K : MapperBase
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{
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private int _gameTotal;
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private int _currentGame;
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public Multicart2K(int gametotal)
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{
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_gameTotal = gametotal;
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_currentGame = 0;
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}
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public override void SyncState(Serializer ser)
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{
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ser.Sync("gameTotal", ref _gameTotal);
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ser.Sync("currentGame", ref _currentGame);
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base.SyncState(ser);
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}
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public override void HardReset()
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{
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IncrementGame();
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}
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private void IncrementGame()
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{
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_currentGame++;
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if (_currentGame >= _gameTotal)
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{
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_currentGame = 0;
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}
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}
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public override byte ReadMemory(ushort addr)
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{
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if (addr < 0x1000)
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{
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return base.ReadMemory(addr);
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}
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return this.Core.Rom[(addr & 0x7FF) + (_currentGame * 2048)];
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}
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public override byte PeekMemory(ushort addr)
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{
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return ReadMemory(addr);
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}
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}
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}
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