140 lines
3.4 KiB
C#
140 lines
3.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using BizHawk.Emulation.CPUs.Z80;
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using BizHawk.Emulation.Sound;
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namespace BizHawk.Emulation.Consoles.Coleco
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{
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public sealed partial class ColecoVision : IEmulator
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{
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// ROM
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public byte[] RomData;
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public int RomLength;
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public byte[] BiosRom;
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// Machine
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public Z80A Cpu;
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public TMS9918A VDP;
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public SN76489 PSG;
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public byte[] Ram = new byte[1024];
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public ColecoVision(GameInfo game, byte[] rom, string biosPath)
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{
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Cpu = new Z80A();
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Cpu.ReadMemory = ReadMemory;
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Cpu.WriteMemory = WriteMemory;
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Cpu.ReadHardware = ReadPort;
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Cpu.WriteHardware = WritePort;
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Cpu.Logger = (s) => Console.WriteLine(s);
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//Cpu.Debug = true;
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VDP = new TMS9918A(Cpu);
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PSG = new SN76489();
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// TODO: hack to allow bios-less operation would be nice, no idea if its feasible
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BiosRom = File.ReadAllBytes(biosPath);
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CoreOutputComm = new CoreOutputComm();
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CoreInputComm = new CoreInputComm();
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LoadRom(rom);
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this.game = game;
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Reset();
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}
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public void FrameAdvance(bool render, bool renderSound)
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{
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PSG.BeginFrame(Cpu.TotalExecutedCycles);
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VDP.ExecuteFrame();
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PSG.EndFrame(Cpu.TotalExecutedCycles);
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}
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void LoadRom(byte[] rom)
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{
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RomData = new byte[0x8000];
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for (int i = 0; i < 0x8000; i++)
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RomData[i] = rom[i % rom.Length];
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}
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void Reset()
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{
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/*Cpu.RegisterPC = Cpu.ReadWord(0x800A);
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Console.WriteLine("code start vector = {0:X4}", Cpu.RegisterPC);*/
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}
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byte ReadPort(ushort port)
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{
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port &= 0xFF;
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//Console.WriteLine("Read port {0:X2}", port);
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if (port >= 0xA0 && port < 0xC0)
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{
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if ((port & 1) == 0)
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return VDP.ReadData();
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return VDP.ReadVdpStatus();
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}
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return 0xFF;
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}
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void WritePort(ushort port, byte value)
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{
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port &= 0xFF;
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if (port >= 0xA0 && port < 0xC0)
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{
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if ((port & 1) == 0)
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VDP.WriteVdpData(value);
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else
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VDP.WriteVdpControl(value);
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return;
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}
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if (port >= 0xE0)
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{
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PSG.WritePsgData(value, Cpu.TotalExecutedCycles);
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return;
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}
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//Console.WriteLine("Write port {0:X2}:{1:X2}", port, value);
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}
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public byte[] ReadSaveRam() { return null; }
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public void StoreSaveRam(byte[] data) { }
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public void ClearSaveRam() { }
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public bool SaveRamModified { get; set; }
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public bool DeterministicEmulation { get { return true; } }
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public void SaveStateText(TextWriter writer) { }
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public void LoadStateText(TextReader reader) { }
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public void SaveStateBinary(BinaryWriter bw) { }
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public void LoadStateBinary(BinaryReader br) { }
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public byte[] SaveStateBinary()
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{
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return new byte[0];
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}
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public void Dispose() { }
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public void ResetFrameCounter() { }
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public string SystemId { get { return "Coleco"; } }
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public GameInfo game;
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public CoreInputComm CoreInputComm { get; set; }
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public CoreOutputComm CoreOutputComm { get; private set; }
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public IVideoProvider VideoProvider { get { return VDP; } }
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public ISoundProvider SoundProvider { get { return PSG; } }
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public ISyncSoundProvider SyncSoundProvider { get { return null; } }
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public bool StartAsyncSound() { return true; }
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public void EndAsyncSound() { }
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public IList<MemoryDomain> MemoryDomains { get { return null; } }
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public MemoryDomain MainMemory { get { return null; } }
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}
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}
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