SMS: port 3E emulation; fixes remaining BIOS roms; check out the rocking Japanese BIOS music!
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beirich
parent
0e06b08f91
commit
d35d9e9d29
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@ -3,7 +3,7 @@
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProductVersion>9.0.30729</ProductVersion>
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<ProductVersion>9.0.21022</ProductVersion>
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<SchemaVersion>2.0</SchemaVersion>
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<ProjectGuid>{197D4314-8A9F-49BA-977D-54ACEFAEB6BA}</ProjectGuid>
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<OutputType>Library</OutputType>
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@ -77,5 +77,50 @@
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WriteMemory(0xFFFE, 1);
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WriteMemory(0xFFFF, 2);
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}
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// Mapper when loading a BIOS as a ROM
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private bool BiosMapped { get { return (Port3E & 0x08) == 0; } }
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private byte ReadMemoryBIOS(ushort address)
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{
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if (BiosMapped == false && address < BankSize * 3)
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return 0x00;
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if (address < 1024)
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return RomData[address];
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if (address < BankSize)
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return RomData[(RomBank0 * BankSize) + address];
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if (address < BankSize * 2)
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return RomData[(RomBank1 * BankSize) + (address & BankSizeMask)];
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if (address < BankSize * 3)
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return RomData[(RomBank2 * BankSize) + (address & BankSizeMask)];
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return SystemRam[address & RamSizeMask];
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}
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private void WriteMemoryBIOS(ushort address, byte value)
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{
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if (address >= 0xC000)
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SystemRam[address & RamSizeMask] = value;
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if (address >= 0xFFFC)
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{
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if (address == 0xFFFD) RomBank0 = (byte)(value % RomBanks);
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else if (address == 0xFFFE) RomBank1 = (byte)(value % RomBanks);
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else if (address == 0xFFFF) RomBank2 = (byte)(value % RomBanks);
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return;
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}
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}
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private void InitBiosMapper()
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{
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Cpu.ReadMemory = ReadMemoryBIOS;
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Cpu.WriteMemory = WriteMemoryBIOS;
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WriteMemory(0xFFFC, 0);
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WriteMemory(0xFFFD, 0);
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WriteMemory(0xFFFE, 1);
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WriteMemory(0xFFFF, 2);
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}
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}
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}
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@ -10,14 +10,13 @@ using BizHawk.Emulation.Sound;
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TODO:
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+ HCounter
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+ Port 3F emulation (Japanese BIOS)
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+ Try to clean up the organization of the source code.
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+ Fix remaining broken games
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**********************************************************/
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namespace BizHawk.Emulation.Consoles.Sega
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{
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public sealed partial class SMS : IEmulator
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{
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// Constants
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@ -54,19 +53,7 @@ namespace BizHawk.Emulation.Consoles.Sega
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private byte Port3E = 0xAF;
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private byte Port3F = 0xFF;
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private int scanlinesPerFrame;
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private DisplayType displayType;
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public DisplayType DisplayType
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{
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get { return displayType; }
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set
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{
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displayType = value;
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scanlinesPerFrame = displayType == DisplayType.NTSC ? 262 : 313;
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}
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}
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public DisplayType DisplayType { get; set; }
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public bool DeterministicEmulation { get; set; }
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public void Init()
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@ -82,16 +69,22 @@ namespace BizHawk.Emulation.Consoles.Sega
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Vdp = new VDP(Cpu, IsGameGear ? VdpMode.GameGear : VdpMode.SMS, DisplayType);
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PSG = new SN76489();
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YM2413 = new YM2413();
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SoundMixer = new SoundMixer(PSG, YM2413);
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SoundMixer = new SoundMixer(YM2413, PSG);
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if (HasYM2413 && Options.Contains("WhenFMDisablePSG"))
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SoundMixer.DisableSource(PSG);
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ActiveSoundProvider = PSG;
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ActiveSoundProvider = HasYM2413 ? (ISoundProvider) SoundMixer : PSG;
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SystemRam = new byte[0x2000];
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if (Options.Contains("CMMapper") == false)
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InitSegaMapper();
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else
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InitCodeMastersMapper();
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if (Options.Contains("BIOS"))
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{
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Port3E = 0xF7; // Disable cartridge, enable BIOS rom
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InitBiosMapper();
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}
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SetupMemoryDomains();
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}
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@ -126,6 +119,7 @@ namespace BizHawk.Emulation.Consoles.Sega
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case 0x04: return 0xFF;
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case 0x05: return 0x00;
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case 0x06: return 0xFF;
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case 0x3E: return Port3E;
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case 0x7E: return Vdp.ReadVLineCounter();
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case 0x7F: break; // hline counter TODO
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case 0xBE: return Vdp.ReadData();
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@ -134,13 +128,7 @@ namespace BizHawk.Emulation.Consoles.Sega
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case 0xDC: return ReadControls1();
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case 0xC1:
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case 0xDD: return ReadControls2();
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case 0xF2:
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if (HasYM2413)
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{
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ActiveSoundProvider = SoundMixer;
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return YM2413.DetectionValue;
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}
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break;
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case 0xF2: return HasYM2413 ? YM2413.DetectionValue : (byte) 0xFF;
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}
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return 0xFF;
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}
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@ -152,6 +140,7 @@ namespace BizHawk.Emulation.Consoles.Sega
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case 0x01: Port01 = value; break;
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case 0x02: Port02 = value; break;
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case 0x06: PSG.StereoPanning = value; break;
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case 0x3E: Port3E = value; break;
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case 0x3F: Port3F = value; break;
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case 0x7E:
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case 0x7F: PSG.WritePsgData(value, Cpu.TotalExecutedCycles); break;
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@ -52,7 +52,7 @@ B33817AE T Alex Kidd in Miracle World [v1] (FR) [A] SMS Floflo
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1BE4314A T Alex Kidd in Miracle World [v1] (FR) [C] SMS Terminus Traduction; v1.0
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5BCD77ED T Alex Kidd in Miracle World [v1] (IT) SMS
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2C08872B H Alex Kidd in Miracle World [Playpal hack] SMS Alex Kidd in Miracle World [v1]; hacked to make it compatible with the PlayPal/Coleco hardware
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CF4A09EA I Alex Kidd in Miracle World [BIOS] SMS
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CF4A09EA I Alex Kidd in Miracle World [BIOS] SMS BIOS
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5C4CA816 H Alex Kidd in Miracle World [BIOS] [Game hack] SMS Alex Kidd in Miracle World [BIOS]; hacked to skip the BIOS checks and boot to the game
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9C5BAD91 I Alex Kidd in Miracle World [BIOS] (KR) SMS
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08C9EC91 Alex Kidd no Miracle World (JP) SMS
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@ -462,7 +462,7 @@ A77F996F F Hang On (BR) [A] (h) SMS
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1C5059F0 Hang On & Astro Warrior (US) SMS
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E167A561 Hang On & Safari Hunt SMS
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C5083000 V Hang On & Safari Hunt (bad dump) SMS Blank 16KB from 1C000 to fix
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91E93385 I Hang On & Safari Hunt [BIOS] SMS
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91E93385 I Hang On & Safari Hunt [BIOS] SMS BIOS
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BC05774F D Happy 10! SMS blind_io; SMS Power Sega 8-bit Coding Competition 2007 entry
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07C39BA4 D Happy Looser SMS Zoop (Bock); Y2Kode entry
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922954C6 B Happy Looser (7 bad bytes) SMS
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@ -902,7 +902,7 @@ E4CD2EDD D SMS APA Demo [v0.02] SMS Haroldo O. Pinheiro
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5AD6EDAC H SMS BIOS (US v1.3) [Hack] SMS SMS BIOS (US v1.3) to make it play the snail game when loaded as a ROM
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0072ED54 I SMS BIOS (US v1.3) SMS
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AD31C5FF D SMS Boot Loader SMS Bock; v0.9
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48D44A13 I SMS Japanese (v2.1) [BIOS] SMS
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48D44A13 I SMS Japanese (v2.1) [BIOS] SMS BIOS;FM
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1A15DFCC I SMS Prototype (M404) [BIOS] SMS
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EE2C29BA I SMS Store Display Unit [BIOS] (non-functional) SMS Different memory map; v1.3
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97B89878 D SMS Cast SMS Bock
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@ -946,7 +946,7 @@ B519E833 Sonic The Hedgehog SMS
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CD1BAC10 F Sonic The Hedgehog (f) SMS F
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246564E6 V Sonic The Hedgehog (bad dump) SMS Very bad
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48806FF7 T Sonic The Hedgehog (FR) SMS Terminus Traduction; v1.00
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81C3476B I Sonic The Hedgehog [BIOS] SMS
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81C3476B I Sonic The Hedgehog [BIOS] SMS BIOS
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4B3C7752 H Sonic 1 Sprite Hack SMS Sonic The Hedgehog by Ambil
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5B3B922C Sonic The Hedgehog 2 [v0] SMS
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CD85F7C5 F Sonic The Hedgehog 2 [v0] (f) SMS F
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