private void Init(GameInfo game, byte[] rom)
{
Cpu = new HuC6280(MemoryCallbacks);
VCE = new VCE();
VDC1 = new VDC(this, Cpu, VCE);
PSG = new HuC6280PSG(735);
SCSI = new ScsiCDBus(this, disc);
Cpu.Logger = s => 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(735, PSG, CDAudio, ADPCM);
_soundProvider = SoundMixer;
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 => Tracer.Put(new(disassembly: $"{SF2MapperLatch:X1}:{s}", registerInfo: string.Empty));
}
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");
VDC1.Resize_Frame_Buffer_MultiResHack();
}
Cpu.ResetPC();
Tracer = new TraceBuffer(Cpu.TraceHeader);
var ser = new BasicServiceProvider(this);
ServiceProvider = ser;
ser.Register <ITraceable>(Tracer);
ser.Register <IDisassemblable>(Cpu);
ser.Register <IVideoProvider>((IVideoProvider)VPC ?? VDC1);
ser.Register <ISoundProvider>(_soundProvider);
ser.Register <IStatable>(new StateSerializer(SyncState));
SetupMemoryDomains();
}
