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BizHawk/BizHawk.Emulation.Cores/Consoles/PC Engine/PCEngine.cs

651 lines
19 KiB
C#
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using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using BizHawk.Common;
using BizHawk.Common.BufferExtensions;
using BizHawk.Emulation.Common;
using BizHawk.Emulation.Common.Components;
using BizHawk.Emulation.Cores.Components.H6280;
using BizHawk.Emulation.DiscSystem;
namespace BizHawk.Emulation.Cores.PCEngine
{
public enum NecSystemType { TurboGrafx, TurboCD, SuperGrafx }
[CoreAttributes(
"PCEHawk",
"Vecna",
isPorted: false,
isReleased: true
)]
public sealed partial class PCEngine : IEmulator, IMemoryDomains
{
// ROM
public byte[] RomData;
public int RomLength;
Disc disc;
// Machine
public NecSystemType Type;
public HuC6280 Cpu;
public VDC VDC1, VDC2;
public VCE VCE;
public VPC VPC;
public ScsiCDBus SCSI;
public ADPCM ADPCM;
public HuC6280PSG PSG;
public CDAudio CDAudio;
public SoundMixer SoundMixer;
public MetaspuSoundProvider SoundSynchronizer;
bool TurboGrafx { get { return Type == NecSystemType.TurboGrafx; } }
bool SuperGrafx { get { return Type == NecSystemType.SuperGrafx; } }
bool TurboCD { get { return Type == NecSystemType.TurboCD; } }
// BRAM
bool BramEnabled = false;
bool BramLocked = true;
byte[] BRAM;
// Memory system
public byte[] Ram; // PCE= 8K base ram, SGX= 64k base ram
public byte[] CDRam; // TurboCD extra 64k of ram
public byte[] SuperRam; // Super System Card 192K of additional RAM
public byte[] ArcadeRam; // Arcade Card 2048K of additional RAM
string systemid = "PCE";
bool ForceSpriteLimit;
// 21,477,270 Machine clocks / sec
// 7,159,090 Cpu cycles / sec
[CoreConstructor("PCE", "SGX")]
public PCEngine(CoreComm comm, GameInfo game, byte[] rom, object Settings, object syncSettings)
{
CoreComm = comm;
CoreComm.CpuTraceAvailable = true;
switch (game.System)
{
case "PCE":
systemid = "PCE";
Type = NecSystemType.TurboGrafx;
break;
case "SGX":
systemid = "SGX";
Type = NecSystemType.SuperGrafx;
break;
}
this._settings = (PCESettings)Settings ?? new PCESettings();
_syncSettings = (PCESyncSettings)syncSettings ?? new PCESyncSettings();
Init(game, rom);
SetControllerButtons();
}
public string BoardName { get { return null; } }
public PCEngine(CoreComm comm, GameInfo game, Disc disc, object Settings, object syncSettings)
{
CoreComm = comm;
CoreComm.CpuTraceAvailable = true;
CoreComm.UsesDriveLed = true;
systemid = "PCECD";
Type = NecSystemType.TurboCD;
this.disc = disc;
this._settings = (PCESettings)Settings ?? new PCESettings();
_syncSettings = (PCESyncSettings)syncSettings ?? new PCESyncSettings();
GameInfo biosInfo;
byte[] rom = CoreComm.CoreFileProvider.GetFirmwareWithGameInfo("PCECD", "Bios", true, out biosInfo,
"PCE-CD System Card not found. Please check the BIOS settings in Config->Firmwares.");
if (biosInfo.Status == RomStatus.BadDump)
{
CoreComm.ShowMessage(
"The PCE-CD System Card you have selected is known to be a bad dump. This may cause problems playing PCE-CD games.\n\n"
+ "It is recommended that you find a good dump of the system card. Sorry to be the bearer of bad news!");
}
else if (biosInfo.NotInDatabase)
{
CoreComm.ShowMessage(
"The PCE-CD System Card you have selected is not recognized in our database. That might mean it's a bad dump, or isn't the correct rom.");
}
else if (biosInfo["BIOS"] == false)
{
//zeromus says: someone please write a note about how this could possibly happen.
//it seems like this is a relic of using gameDB for storing whether something is a bios? firmwareDB should be handling it now.
CoreComm.ShowMessage(
"The PCE-CD System Card you have selected is not a BIOS image. You may have selected the wrong rom. FYI-Please report this to developers, I don't think this error message should happen.");
}
if (biosInfo["SuperSysCard"])
{
game.AddOption("SuperSysCard");
}
if (game["NeedSuperSysCard"] && game["SuperSysCard"] == false)
{
CoreComm.ShowMessage(
"This game requires a version 3.0 System card and won't run with the system card you've selected. Try selecting a 3.0 System Card in the firmware configuration.");
throw new Exception();
}
game.FirmwareHash = rom.HashSHA1();
Init(game, rom);
// the default RomStatusDetails don't do anything with Disc
CoreComm.RomStatusDetails = string.Format("{0}\r\nDisk partial hash:{1}", game.Name, disc.GetHash());
SetControllerButtons();
}
void Init(GameInfo game, byte[] rom)
{
Controller = NullController.GetNullController();
Cpu = new HuC6280(CoreComm);
VCE = new VCE();
VDC1 = new VDC(this, Cpu, VCE);
PSG = new HuC6280PSG();
SCSI = new ScsiCDBus(this, disc);
Cpu.Logger = (s) => CoreComm.Tracer.Put(s);
if (TurboGrafx)
{
Ram = new byte[0x2000];
Cpu.ReadMemory21 = ReadMemory;
Cpu.WriteMemory21 = WriteMemory;
Cpu.WriteVDC = VDC1.WriteVDC;
soundProvider = PSG;
CDAudio = new CDAudio(null, 0);
}
else if (SuperGrafx)
{
VDC2 = new VDC(this, Cpu, VCE);
VPC = new VPC(this, VDC1, VDC2, VCE, Cpu);
Ram = new byte[0x8000];
Cpu.ReadMemory21 = ReadMemorySGX;
Cpu.WriteMemory21 = WriteMemorySGX;
Cpu.WriteVDC = VDC1.WriteVDC;
soundProvider = PSG;
CDAudio = new CDAudio(null, 0);
}
else if (TurboCD)
{
Ram = new byte[0x2000];
CDRam = new byte[0x10000];
ADPCM = new ADPCM(this, SCSI);
Cpu.ReadMemory21 = ReadMemoryCD;
Cpu.WriteMemory21 = WriteMemoryCD;
Cpu.WriteVDC = VDC1.WriteVDC;
CDAudio = new CDAudio(disc);
SetCDAudioCallback();
PSG.MaxVolume = short.MaxValue * 3 / 4;
SoundMixer = new SoundMixer(PSG, CDAudio, ADPCM);
SoundSynchronizer = new MetaspuSoundProvider(ESynchMethod.ESynchMethod_V);
soundProvider = SoundSynchronizer;
Cpu.ThinkAction = (cycles) => { SCSI.Think(); ADPCM.Think(cycles); };
}
if (rom.Length == 0x60000)
{
// 384k roms require special loading code. Why ;_;
// In memory, 384k roms look like [1st 256k][Then full 384k]
RomData = new byte[0xA0000];
var origRom = rom;
for (int i = 0; i < 0x40000; i++)
RomData[i] = origRom[i];
for (int i = 0; i < 0x60000; i++)
RomData[i + 0x40000] = origRom[i];
RomLength = RomData.Length;
}
else if (rom.Length > 1024 * 1024)
{
// If the rom is bigger than 1 megabyte, switch to Street Fighter 2 mapper
Cpu.ReadMemory21 = ReadMemorySF2;
Cpu.WriteMemory21 = WriteMemorySF2;
RomData = rom;
RomLength = RomData.Length;
// user request: current value of the SF2MapperLatch on the tracelogger
Cpu.Logger = (s) => CoreComm.Tracer.Put(string.Format("{0:X1}:{1}", SF2MapperLatch, s));
}
else
{
// normal rom.
RomData = rom;
RomLength = RomData.Length;
}
if (game["BRAM"] || Type == NecSystemType.TurboCD)
{
BramEnabled = true;
BRAM = new byte[2048];
// pre-format BRAM. damn are we helpful.
BRAM[0] = 0x48; BRAM[1] = 0x55; BRAM[2] = 0x42; BRAM[3] = 0x4D;
BRAM[4] = 0x00; BRAM[5] = 0x88; BRAM[6] = 0x10; BRAM[7] = 0x80;
}
if (game["SuperSysCard"])
SuperRam = new byte[0x30000];
if (game["ArcadeCard"])
{
ArcadeRam = new byte[0x200000];
ArcadeCard = true;
ArcadeCardRewindHack = _settings.ArcadeCardRewindHack;
for (int i = 0; i < 4; i++)
ArcadePage[i] = new ArcadeCardPage();
}
if (game["PopulousSRAM"])
{
PopulousRAM = new byte[0x8000];
Cpu.ReadMemory21 = ReadMemoryPopulous;
Cpu.WriteMemory21 = WriteMemoryPopulous;
}
// the gamedb can force sprite limit on, ignoring settings
if (game["ForceSpriteLimit"] || game.NotInDatabase)
ForceSpriteLimit = true;
if (game["CdVol"])
CDAudio.MaxVolume = int.Parse(game.OptionValue("CdVol"));
if (game["PsgVol"])
PSG.MaxVolume = int.Parse(game.OptionValue("PsgVol"));
if (game["AdpcmVol"])
ADPCM.MaxVolume = int.Parse(game.OptionValue("AdpcmVol"));
// the gamedb can also force equalizevolumes on
if (TurboCD && (_settings.EqualizeVolume || game["EqualizeVolumes"] || game.NotInDatabase))
SoundMixer.EqualizeVolumes();
// Ok, yes, HBlankPeriod's only purpose is game-specific hax.
// 1) At least they're not coded directly into the emulator, but instead data-driven.
// 2) The games which have custom HBlankPeriods work without it, the override only
// serves to clean up minor gfx anomalies.
// 3) There's no point in haxing the timing with incorrect values in an attempt to avoid this.
// The proper fix is cycle-accurate/bus-accurate timing. That isn't coming to the C#
// version of this core. Let's just acknolwedge that the timing is imperfect and fix
// it in the least intrusive and most honest way we can.
if (game["HBlankPeriod"])
VDC1.HBlankCycles = game.GetIntValue("HBlankPeriod");
// This is also a hack. Proper multi-res/TV emulation will be a native-code core feature.
if (game["MultiResHack"])
VDC1.MultiResHack = game.GetIntValue("MultiResHack");
Cpu.ResetPC();
SetupMemoryDomains();
}
int lagCount;
int frame;
bool lagged = true;
bool isLag = false;
public int Frame { get { return frame; } set { frame = value; } }
public int LagCount { get { return lagCount; } set { lagCount = value; } }
public bool IsLagFrame { get { return isLag; } }
public void ResetCounters()
{
// this should just be a public setter instead of a new method.
Frame = 0;
lagCount = 0;
isLag = false;
}
public void FrameAdvance(bool render, bool rendersound)
{
lagged = true;
CoreComm.DriveLED = false;
Frame++;
CheckSpriteLimit();
PSG.BeginFrame(Cpu.TotalExecutedCycles);
Cpu.Debug = CoreComm.Tracer.Enabled;
if (SuperGrafx)
VPC.ExecFrame(render);
else
VDC1.ExecFrame(render);
PSG.EndFrame(Cpu.TotalExecutedCycles);
if (TurboCD)
SoundSynchronizer.PullSamples(SoundMixer);
if (lagged)
{
lagCount++;
isLag = true;
}
else
isLag = false;
}
void CheckSpriteLimit()
{
bool spriteLimit = ForceSpriteLimit | _settings.SpriteLimit;
VDC1.PerformSpriteLimit = spriteLimit;
if (VDC2 != null)
VDC2.PerformSpriteLimit = spriteLimit;
}
public CoreComm CoreComm { get; private set; }
public IVideoProvider VideoProvider
{
get { return (IVideoProvider)VPC ?? VDC1; }
}
ISoundProvider soundProvider;
public ISoundProvider SoundProvider
{
get { return soundProvider; }
}
public ISyncSoundProvider SyncSoundProvider { get { return new FakeSyncSound(soundProvider, 735); } }
public bool StartAsyncSound() { return true; }
public void EndAsyncSound() { }
public string SystemId { get { return systemid; } }
public string Region { get; set; }
public bool DeterministicEmulation { get { return true; } }
public byte[] CloneSaveRam()
{
if (BRAM != null)
return (byte[])BRAM.Clone();
else
return null;
}
public void StoreSaveRam(byte[] data)
{
if (BRAM != null)
Array.Copy(data, BRAM, data.Length);
}
public void ClearSaveRam()
{
if (BRAM != null)
BRAM = new byte[BRAM.Length];
}
public bool SaveRamModified { get; set; }
public bool BinarySaveStatesPreferred { get { return false; } }
public void SaveStateBinary(BinaryWriter bw) { SyncState(Serializer.CreateBinaryWriter(bw)); }
public void LoadStateBinary(BinaryReader br) { SyncState(Serializer.CreateBinaryReader(br)); }
public void SaveStateText(TextWriter tw) { SyncState(Serializer.CreateTextWriter(tw)); }
public void LoadStateText(TextReader tr) { SyncState(Serializer.CreateTextReader(tr)); }
void SyncState(Serializer ser)
{
ser.BeginSection("PCEngine");
Cpu.SyncState(ser);
VCE.SyncState(ser);
VDC1.SyncState(ser, 1);
PSG.SyncState(ser);
if (SuperGrafx)
{
VPC.SyncState(ser);
VDC2.SyncState(ser, 2);
}
if (TurboCD)
{
ADPCM.SyncState(ser);
CDAudio.SyncState(ser);
SCSI.SyncState(ser);
ser.Sync("CDRAM", ref CDRam, false);
if (SuperRam != null)
ser.Sync("SuperRAM", ref SuperRam, false);
if (ArcadeCard)
ArcadeCardSyncState(ser);
}
ser.Sync("RAM", ref Ram, false);
ser.Sync("IOBuffer", ref IOBuffer);
ser.Sync("CdIoPorts", ref CdIoPorts, false);
ser.Sync("BramLocked", ref BramLocked);
ser.Sync("Frame", ref frame);
ser.Sync("Lag", ref lagCount);
ser.Sync("IsLag", ref isLag);
if (Cpu.ReadMemory21 == ReadMemorySF2)
ser.Sync("SF2MapperLatch", ref SF2MapperLatch);
if (PopulousRAM != null)
ser.Sync("PopulousRAM", ref PopulousRAM, false);
if (BRAM != null)
ser.Sync("BRAM", ref BRAM, false);
ser.EndSection();
}
byte[] stateBuffer;
public byte[] SaveStateBinary()
{
if (stateBuffer == null)
{
var stream = new MemoryStream();
var writer = new BinaryWriter(stream);
SaveStateBinary(writer);
writer.Flush();
stateBuffer = stream.ToArray();
writer.Close();
return stateBuffer;
}
else
{
var stream = new MemoryStream(stateBuffer);
var writer = new BinaryWriter(stream);
SaveStateBinary(writer);
writer.Flush();
writer.Close();
return stateBuffer;
}
}
void SetupMemoryDomains()
{
var domains = new List<MemoryDomain>(10);
int mainmemorymask = Ram.Length - 1;
var MainMemoryDomain = new MemoryDomain("Main Memory", Ram.Length, MemoryDomain.Endian.Little,
addr => Ram[addr],
(addr, value) => Ram[addr] = value);
domains.Add(MainMemoryDomain);
var SystemBusDomain = new MemoryDomain("System Bus", 0x200000, MemoryDomain.Endian.Little,
(addr) =>
{
if (addr < 0 || addr >= 0x200000)
throw new ArgumentOutOfRangeException();
return Cpu.ReadMemory21(addr);
},
(addr, value) =>
{
if (addr < 0 || addr >= 0x200000)
throw new ArgumentOutOfRangeException();
Cpu.WriteMemory21(addr, value);
});
domains.Add(SystemBusDomain);
var RomDomain = new MemoryDomain("ROM", RomLength, MemoryDomain.Endian.Little,
addr => RomData[addr],
(addr, value) => RomData[addr] = value);
domains.Add(RomDomain);
if (BRAM != null)
{
var BRAMMemoryDomain = new MemoryDomain("Battery RAM", Ram.Length, MemoryDomain.Endian.Little,
addr => BRAM[addr],
(addr, value) => BRAM[addr] = value);
domains.Add(BRAMMemoryDomain);
}
if (TurboCD)
{
var CDRamMemoryDomain = new MemoryDomain("TurboCD RAM", CDRam.Length, MemoryDomain.Endian.Little,
addr => CDRam[addr],
(addr, value) => CDRam[addr] = value);
domains.Add(CDRamMemoryDomain);
var AdpcmMemoryDomain = new MemoryDomain("ADPCM RAM", ADPCM.RAM.Length, MemoryDomain.Endian.Little,
addr => ADPCM.RAM[addr],
(addr, value) => ADPCM.RAM[addr] = value);
domains.Add(AdpcmMemoryDomain);
if (SuperRam != null)
{
var SuperRamMemoryDomain = new MemoryDomain("Super System Card RAM", SuperRam.Length, MemoryDomain.Endian.Little,
addr => SuperRam[addr],
(addr, value) => SuperRam[addr] = value);
domains.Add(SuperRamMemoryDomain);
}
}
if (ArcadeCard)
{
var ArcadeRamMemoryDomain = new MemoryDomain("Arcade Card RAM", ArcadeRam.Length, MemoryDomain.Endian.Little,
addr => ArcadeRam[addr],
(addr, value) => ArcadeRam[addr] = value);
domains.Add(ArcadeRamMemoryDomain);
}
if (PopulousRAM != null)
{
var PopulusRAMDomain = new MemoryDomain("Cart Battery RAM", PopulousRAM.Length, MemoryDomain.Endian.Little,
addr => PopulousRAM[addr],
(addr, value) => PopulousRAM[addr] = value);
domains.Add(PopulusRAMDomain);
}
memoryDomains = new MemoryDomainList(domains);
}
MemoryDomainList memoryDomains;
public MemoryDomainList MemoryDomains { get { return memoryDomains; } }
public Dictionary<string, int> GetCpuFlagsAndRegisters()
{
return new Dictionary<string, int>
{
{ "A", Cpu.A },
{ "X", Cpu.X },
{ "Y", Cpu.Y },
{ "PC", Cpu.PC },
{ "S", Cpu.S },
{ "MPR-0", Cpu.MPR[0] },
{ "MPR-1", Cpu.MPR[1] },
{ "MPR-2", Cpu.MPR[2] },
{ "MPR-3", Cpu.MPR[3] },
{ "MPR-4", Cpu.MPR[4] },
{ "MPR-5", Cpu.MPR[5] },
{ "MPR-6", Cpu.MPR[6] },
{ "MPR-7", Cpu.MPR[7] }
};
}
public void SetCpuRegister(string register, int value)
{
throw new NotImplementedException();
}
public void Dispose()
{
if (disc != null)
disc.Dispose();
}
public PCESettings _settings;
private PCESyncSettings _syncSettings;
public object GetSettings() { return _settings.Clone(); }
public object GetSyncSettings() { return _syncSettings.Clone(); }
public bool PutSettings(object o)
{
PCESettings n = (PCESettings)o;
bool ret;
if (n.ArcadeCardRewindHack != _settings.ArcadeCardRewindHack ||
n.EqualizeVolume != _settings.EqualizeVolume)
ret = true;
else
ret = false;
_settings = n;
return ret;
}
public bool PutSyncSettings(object o)
{
var newsyncsettings = (PCESyncSettings)o;
bool ret = PCESyncSettings.NeedsReboot(newsyncsettings, _syncSettings);
_syncSettings = newsyncsettings;
// SetControllerButtons(); // not safe to change the controller during emulation, so instead make it a reboot event
return ret;
}
public class PCESettings
{
public bool ShowBG1 = true;
public bool ShowOBJ1 = true;
public bool ShowBG2 = true;
public bool ShowOBJ2 = true;
// these three require core reboot to use
public bool SpriteLimit = false;
public bool EqualizeVolume = false;
public bool ArcadeCardRewindHack = true;
public PCESettings Clone()
{
return (PCESettings)MemberwiseClone();
}
}
public class PCESyncSettings
{
public ControllerSetting[] Controllers =
{
new ControllerSetting { IsConnected = true },
new ControllerSetting { IsConnected = false },
new ControllerSetting { IsConnected = false },
new ControllerSetting { IsConnected = false },
new ControllerSetting { IsConnected = false }
};
public PCESyncSettings Clone()
{
var ret = new PCESyncSettings();
for (int i = 0; i < Controllers.Length; i++)
{
ret.Controllers[i].IsConnected = Controllers[i].IsConnected;
}
return ret;
}
public class ControllerSetting
{
public bool IsConnected { get; set; }
}
public static bool NeedsReboot(PCESyncSettings x, PCESyncSettings y)
{
for (int i = 0; i < x.Controllers.Length; i++)
{
if (x.Controllers[i].IsConnected != y.Controllers[i].IsConnected)
return true;
}
return false;
}
}
}
}
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