private void WritePort(ushort port, byte value)
{
port &= 0xFF;
if (port < 0x40) // general IO ports
{
switch (port & 0xFF)
{
case 0x01: Port01 = value; break;
case 0x02: Port02 = value; break;
case 0x03: p3_write = true; Port03 = value; break;
case 0x04: /*Port04 = value;*/ break; // receive port, not sure what writing does
case 0x05: Port05 = (byte)(value & 0xF8); break;
case 0x06: PSG.Set_Panning(value); break;
case 0x3E: Port3E = value; break;
case 0x3F: Port3F = value; break;
}
}
else if (port < 0x80) // PSG
{
PSG.WriteReg(value);
}
else if (port < 0xC0) // VDP
{
if ((port & 1) == 0)
{
Vdp.WriteVdpData(value);
}
else
{
Vdp.WriteVdpControl(value);
}
}
else if (port == 0xDE && PortDEEnabled)
{
PortDE = value;
}
else if (port == 0xF0 && HasYM2413)
{
YM2413.RegisterLatch = value;
}
else if (port == 0xF1 && HasYM2413)
{
YM2413.Write(value);
}
else if (port == 0xF2 && HasYM2413)
{
YM2413.DetectionValue = value;
}
}
private void WritePort(ushort port, byte value)
{
port &= 0xFF;
if (port < 0x40) // general IO ports
{
switch (port & 0xFF)
{
case 0x01: Port01 = value; break;
case 0x02: Port02 = value; break;
case 0x05: Port05 = value; break;
case 0x06: PSG.Set_Panning(value); break;
case 0x3E: Port3E = value; break;
case 0x3F: Port3F = value; break;
}
}
else if (port < 0x80) // PSG
{
PSG.WriteReg(value);
}
else if (port < 0xC0) // VDP
{
if ((port & 1) == 0)
{
Vdp.WriteVdpData(value);
}
else
{
Vdp.WriteVdpControl(value);
}
}
else if (port == 0xDE && PortDEEnabled)
{
PortDE = value;
}
else if (port == 0xF0 && HasYM2413)
{
YM2413.RegisterLatch = value;
}
else if (port == 0xF1 && HasYM2413)
{
YM2413.Write(value);
}
else if (port == 0xF2 && HasYM2413)
{
YM2413.DetectionValue = value;
}
}
public SMS(CoreComm comm, GameInfo game, byte[] rom, object settings, object syncSettings)
{
ServiceProvider = new BasicServiceProvider(this);
Settings = (SmsSettings)settings ?? new SmsSettings();
SyncSettings = (SmsSyncSettings)syncSettings ?? new SmsSyncSettings();
CoreComm = comm;
MemoryCallbacks = new MemoryCallbackSystem(new[] { "System Bus" });
IsGameGear = game.System == "GG";
IsGameGear_C = game.System == "GG";
IsSG1000 = game.System == "SG";
RomData = rom;
if (RomData.Length % BankSize != 0)
{
Array.Resize(ref RomData, ((RomData.Length / BankSize) + 1) * BankSize);
}
RomBanks = (byte)(RomData.Length / BankSize);
Region = DetermineDisplayType(SyncSettings.DisplayType, game.Region);
if (game["PAL"] && Region != DisplayType.PAL)
{
Region = DisplayType.PAL;
CoreComm.Notify("Display was forced to PAL mode for game compatibility.");
}
if (IsGameGear)
{
Region = DisplayType.NTSC; // all game gears run at 60hz/NTSC mode
}
_region = SyncSettings.ConsoleRegion;
if (_region == SmsSyncSettings.Regions.Auto)
{
_region = DetermineRegion(game.Region);
}
if (game["Japan"] && _region != SmsSyncSettings.Regions.Japan)
{
_region = SmsSyncSettings.Regions.Japan;
CoreComm.Notify("Region was forced to Japan for game compatibility.");
}
if (game["Korea"] && _region != SmsSyncSettings.Regions.Korea)
{
_region = SmsSyncSettings.Regions.Korea;
CoreComm.Notify("Region was forced to Korea for game compatibility.");
}
if ((game.NotInDatabase || game["FM"]) && SyncSettings.EnableFm && !IsGameGear)
{
HasYM2413 = true;
}
Cpu = new Z80A()
{
ReadHardware = ReadPort,
WriteHardware = WritePort,
FetchMemory = FetchMemory,
ReadMemory = ReadMemory,
WriteMemory = WriteMemory,
MemoryCallbacks = MemoryCallbacks,
OnExecFetch = OnExecMemory
};
if (game["GG_in_SMS"])
{
// skip setting the BIOS because this is a game gear game that puts the system
// in SMS compatibility mode (it will fail the check sum if played on an actual SMS though.)
IsGameGear = false;
IsGameGear_C = true;
game.System = "GG";
Console.WriteLine("Using SMS Compatibility mode for Game Gear System");
}
Vdp = new VDP(this, Cpu, IsGameGear ? VdpMode.GameGear : VdpMode.SMS, Region);
(ServiceProvider as BasicServiceProvider).Register <IVideoProvider>(Vdp);
PSG = new SN76489sms();
YM2413 = new YM2413();
//SoundMixer = new SoundMixer(YM2413, PSG);
if (HasYM2413 && game["WhenFMDisablePSG"])
{
disablePSG = true;
}
blip_L.SetRates(3579545, 44100);
blip_R.SetRates(3579545, 44100);
(ServiceProvider as BasicServiceProvider).Register <ISoundProvider>(this);
SystemRam = new byte[0x2000];
if (game["CMMapper"])
{
InitCodeMastersMapper();
}
else if (game["CMMapperWithRam"])
{
InitCodeMastersMapperRam();
}
else if (game["ExtRam"])
{
InitExt2kMapper(int.Parse(game.OptionValue("ExtRam")));
}
else if (game["KoreaMapper"])
{
InitKoreaMapper();
}
else if (game["MSXMapper"])
{
InitMSXMapper();
}
else if (game["NemesisMapper"])
{
InitNemesisMapper();
}
else if (game["TerebiOekaki"])
{
InitTerebiOekaki();
}
else if (game["EEPROM"])
{
InitEEPROMMapper();
}
else
{
InitSegaMapper();
}
if (Settings.ForceStereoSeparation && !IsGameGear)
{
if (game["StereoByte"])
{
ForceStereoByte = byte.Parse(game.OptionValue("StereoByte"));
}
PSG.Set_Panning(ForceStereoByte);
}
if (SyncSettings.AllowOverClock && game["OverclockSafe"])
{
Vdp.IPeriod = 512;
}
if (Settings.SpriteLimit)
{
Vdp.SpriteLimit = true;
}
if (game["3D"])
{
IsGame3D = true;
}
if (game["BIOS"])
{
Port3E = 0xF7; // Disable cartridge, enable BIOS rom
InitBiosMapper();
}
else if (game.System == "SMS" && !game["GG_in_SMS"])
{
BiosRom = comm.CoreFileProvider.GetFirmware("SMS", _region.ToString(), false);
if (BiosRom == null)
{
throw new MissingFirmwareException("No BIOS found");
}
if (!game["RequireBios"] && !SyncSettings.UseBios)
{
// we are skipping the BIOS
// but only if it won't break the game
}
else
{
Port3E = 0xF7;
}
}
if (game["SRAM"])
{
SaveRAM = new byte[int.Parse(game.OptionValue("SRAM"))];
Console.WriteLine(SaveRAM.Length);
}
else if (game.NotInDatabase)
{
SaveRAM = new byte[0x8000];
}
SetupMemoryDomains();
//this manages the linkage between the cpu and mapper callbacks so it needs running before bootup is complete
((ICodeDataLogger)this).SetCDL(null);
InputCallbacks = new InputCallbackSystem();
Tracer = new TraceBuffer {
Header = Cpu.TraceHeader
};
var serviceProvider = ServiceProvider as BasicServiceProvider;
serviceProvider.Register <ITraceable>(Tracer);
serviceProvider.Register <IDisassemblable>(Cpu);
Vdp.ProcessOverscan();
Cpu.ReadMemory = ReadMemory;
Cpu.WriteMemory = WriteMemory;
// Z80 SP initialization
// stops a few SMS and GG games from crashing
Cpu.Regs[Cpu.SPl] = 0xF0;
Cpu.Regs[Cpu.SPh] = 0xDF;
}