51 lines
975 B
C#
51 lines
975 B
C#
using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Atari.Atari2600
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{
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internal sealed 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(Atari2600 core, int gameTotal)
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: base(core)
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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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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 Core.Rom[(addr & 0x7FF) + (_currentGame * 2048)];
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}
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public override byte PeekMemory(ushort addr) => ReadMemory(addr);
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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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}
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}
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