90 lines
2.4 KiB
C#
90 lines
2.4 KiB
C#
namespace EMU7800.Core
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{
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/// <summary>
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/// Atari 7800 non-bankswitched 32KB cartridge w/Pokey
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/// </summary>
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public sealed class Cart7832P : Cart
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{
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//
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// Cart Format Mapping to ROM Address Space
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// 0x4000:0x4000 Pokey
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// 0x0000:0x8000 0x8000:0x8000
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//
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PokeySound _pokeySound;
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#region IDevice Members
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public override void Reset()
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{
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base.Reset();
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if (_pokeySound != null)
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_pokeySound.Reset();
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}
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public override byte this[ushort addr]
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{
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get
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{
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return ((addr & 0xF000) == 0x4000 && _pokeySound != null) ? _pokeySound.Read(addr) : ROM[addr & 0x7fff];
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}
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set
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{
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if ((addr & 0xF000) == 0x4000 && _pokeySound != null)
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_pokeySound.Update(addr, value);
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}
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}
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#endregion
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public override void Attach(MachineBase m)
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{
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base.Attach(m);
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if (_pokeySound == null)
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_pokeySound = new PokeySound(M);
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}
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public override void StartFrame()
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{
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if (_pokeySound != null)
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_pokeySound.StartFrame();
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}
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public override void EndFrame()
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{
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if (_pokeySound != null)
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_pokeySound.EndFrame();
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}
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private Cart7832P()
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{
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}
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public Cart7832P(byte[] romBytes)
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{
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LoadRom(romBytes, 0x8000);
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}
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#region Serialization Members
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public Cart7832P(DeserializationContext input, MachineBase m) : base(input)
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{
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input.CheckVersion(1);
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LoadRom(input.ReadExpectedBytes(0x8000), 0x8000);
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_pokeySound = input.ReadOptionalPokeySound(m);
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}
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public override void GetObjectData(SerializationContext output)
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{
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if (_pokeySound == null)
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throw new Emu7800SerializationException("Cart7832P must be attached before serialization.");
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base.GetObjectData(output);
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output.WriteVersion(1);
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output.Write(ROM);
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output.WriteOptional(_pokeySound);
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}
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#endregion
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}
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} |