416 lines
14 KiB
C#
416 lines
14 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper001 Nintendo MMC1 //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using BYTE = System.Byte;
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using INT = System.Int32;
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namespace VirtualNes.Core
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{
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public class Mapper001 : Mapper
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{
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uint last_addr;
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BYTE patch;
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BYTE wram_patch;
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BYTE wram_bank;
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BYTE wram_count;
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BYTE[] reg = new byte[4];
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BYTE shift, regbuf;
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public Mapper001(NES parent) : base(parent) { }
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public override void Reset()
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{
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reg[0] = 0x0C; // D3=1,D2=1
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reg[1] = reg[2] = reg[3] = 0;
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shift = regbuf = 0;
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patch = 0;
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wram_patch = 0;
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if (PROM_16K_SIZE < 32)
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{
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SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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}
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else
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{
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// For 512K/1M byte Cartridge
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SetPROM_16K_Bank(4, 0);
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SetPROM_16K_Bank(6, 16 - 1);
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patch = 1;
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}
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if (VROM_8K_SIZE != 0)
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{
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// SetVROM_8K_Bank( 0 );
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}
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uint crc = nes.rom.GetPROM_CRC();
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if (crc == 0xb8e16bd0)
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{ // Snow Bros.(J)
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patch = 2;
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}
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// if( crc == 0x9b565541 ) { // Triathron, The(J)
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// nes.SetFrameIRQmode( FALSE );
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// }
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if (crc == 0xc96c6f04)
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{ // Venus Senki(J)
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nes.SetRenderMethod(EnumRenderMethod.POST_ALL_RENDER);
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}
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// if( crc == 0x5e3f7004 ) { // Softball Tengoku(J)
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// }
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if (crc == 0x4d2edf70)
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{ // Night Rider(J)
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nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
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}
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if (crc == 0xcd2a73f0)
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{ // Pirates!(U)
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nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
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patch = 2;
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}
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// if( crc == 0x09efe54b ) { // Majaventure - Mahjong Senki(J)
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// nes.SetFrameIRQmode( FALSE );
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// }
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if (crc == 0x11469ce3)
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{ // Viva! Las Vegas(J)
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}
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if (crc == 0xd878ebf5)
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{ // Ninja Ryukenden(J)
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nes.SetRenderMethod(EnumRenderMethod.POST_ALL_RENDER);
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}
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// if( crc == 0x7bd7b849 ) { // Nekketsu Koukou - Dodgeball Bu(J)
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// }
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if (crc == 0x466efdc2)
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{ // Final Fantasy(J)
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nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
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nes.ppu.SetExtMonoMode(true);
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}
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if (crc == 0xc9556b36)
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{ // Final Fantasy I&II(J)
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nes.SetRenderMethod(EnumRenderMethod.TILE_RENDER);
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nes.ppu.SetExtMonoMode(true);
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nes.SetSAVERAM_SIZE(16 * 1024);
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wram_patch = 2;
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}
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if (crc == 0x717e1169)
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{ // Cosmic Wars(J)
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nes.SetRenderMethod(EnumRenderMethod.PRE_ALL_RENDER);
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}
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if (crc == 0xC05D2034)
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{ // Snake's Revenge(U)
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nes.SetRenderMethod(EnumRenderMethod.PRE_ALL_RENDER);
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}
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if (crc == 0xb8747abf // Best Play - Pro Yakyuu Special(J)
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|| crc == 0x29449ba9 // Nobunaga no Yabou - Zenkoku Ban(J)
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|| crc == 0x2b11e0b0 // Nobunaga no Yabou - Zenkoku Ban(J)(alt)
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|| crc == 0x4642dda6 // Nobunaga's Ambition(U)
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|| crc == 0xfb69743a // Aoki Ookami to Shiroki Mejika - Genghis Khan(J)
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|| crc == 0x2225c20f // Genghis Khan(U)
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|| crc == 0xabbf7217 // Sangokushi(J)
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)
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{
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nes.SetSAVERAM_SIZE(16 * 1024);
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wram_patch = 1;
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wram_bank = 0;
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wram_count = 0;
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}
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}
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private ArrayRef<byte> _PROM_BANK = new ArrayRef<byte>();
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//void Mapper001::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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// DEBUGOUT( "MMC1 %04X=%02X\n", addr&0xFFFF,data&0xFF );
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if (wram_patch == 1 && addr == 0xBFFF)
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{
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wram_count++;
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wram_bank += (byte)(data & 0x01);
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if (wram_count == 5)
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{
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if (wram_bank != 0)
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{
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_PROM_BANK.SetArray(WRAM, 0x2000);
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SetPROM_Bank(3, _PROM_BANK, BANKTYPE_RAM);
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}
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else
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{
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_PROM_BANK.SetArray(WRAM, 0x0000);
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SetPROM_Bank(3, _PROM_BANK, BANKTYPE_RAM);
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}
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wram_bank = wram_count = 0;
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}
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}
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if (patch != 1)
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{
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if ((addr & 0x6000) != (last_addr & 0x6000))
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{
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shift = regbuf = 0;
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}
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last_addr = addr;
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}
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if ((data & 0x80) != 0)
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{
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shift = regbuf = 0;
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// reg[0] = 0x0C; // D3=1,D2=1
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reg[0] |= 0x0C; // D3=1,D2=1 残りはリセットされない
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return;
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}
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if ((data & 0x01) != 0) regbuf |= (byte)(1 << shift);
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if (++shift < 5)
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return;
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addr = (ushort)((addr & 0x7FFF) >> 13);
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reg[addr] = regbuf;
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// DEBUGOUT( "MMC1 %d=%02X\n", addr&0xFFFF,regbuf&0xFF );
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regbuf = 0;
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shift = 0;
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if (patch != 1)
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{
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// For Normal Cartridge
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switch (addr)
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{
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case 0:
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if ((reg[0] & 0x02) != 0)
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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}
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else
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
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else SetVRAM_Mirror(VRAM_MIRROR4L);
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}
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break;
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case 1:
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// Register #1
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank(0, reg[1]);
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// CHR 4K bank higher($1000-$1FFF)
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SetVROM_4K_Bank(4, reg[2]);
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}
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else
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{
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// CHR 8K bank($0000-$1FFF)
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SetVROM_8K_Bank(reg[1] >> 1);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(0, reg[1]);
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}
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}
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break;
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case 2:
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// Register #2
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank(0, reg[1]);
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// CHR 4K bank higher($1000-$1FFF)
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SetVROM_4K_Bank(4, reg[2]);
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}
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else
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{
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// CHR 8K bank($0000-$1FFF)
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SetVROM_8K_Bank(reg[1] >> 1);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(4, reg[2]);
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}
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}
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break;
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case 3:
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if (!((reg[0] & 0x08) != 0))
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{
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// PRG 32K bank ($8000-$FFFF)
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SetPROM_32K_Bank(reg[3] >> 1);
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}
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else
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{
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if ((reg[0] & 0x04) != 0)
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{
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// PRG 16K bank ($8000-$BFFF)
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SetPROM_16K_Bank(4, reg[3]);
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SetPROM_16K_Bank(6, PROM_16K_SIZE - 1);
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}
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else
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{
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// PRG 16K bank ($C000-$FFFF)
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SetPROM_16K_Bank(6, reg[3]);
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SetPROM_16K_Bank(4, 0);
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}
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}
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break;
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}
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}
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else
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{
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// For 512K/1M byte Cartridge
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INT PROM_BASE = 0;
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if (PROM_16K_SIZE >= 32)
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{
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PROM_BASE = reg[1] & 0x10;
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}
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// For FinalFantasy I&II
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if (wram_patch == 2)
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{
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if (((reg[1] & 0x18) == 0))
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{
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_PROM_BANK.SetArray(WRAM, 0x0000);
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SetPROM_Bank(3, _PROM_BANK, BANKTYPE_RAM);
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}
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else
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{
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_PROM_BANK.SetArray(WRAM, 0x2000);
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SetPROM_Bank(3, _PROM_BANK, BANKTYPE_RAM);
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}
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}
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// Register #0
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if (addr == 0)
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{
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if ((reg[0] & 0x02) != 0)
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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}
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else
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
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else SetVRAM_Mirror(VRAM_MIRROR4L);
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}
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}
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// Register #1
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank(0, reg[1]);
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}
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else
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{
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// CHR 8K bank($0000-$1FFF)
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SetVROM_8K_Bank(reg[1] >> 1);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(0, reg[1]);
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}
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}
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// Register #2
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank higher($1000-$1FFF)
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SetVROM_4K_Bank(4, reg[2]);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(4, reg[2]);
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}
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}
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// Register #3
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if (((reg[0] & 0x08) == 0))
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{
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// PRG 32K bank ($8000-$FFFF)
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SetPROM_32K_Bank((reg[3] & (0xF + PROM_BASE)) >> 1);
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}
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else
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{
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if ((reg[0] & 0x04) != 0)
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{
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// PRG 16K bank ($8000-$BFFF)
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SetPROM_16K_Bank(4, PROM_BASE + (reg[3] & 0x0F));
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if (PROM_16K_SIZE >= 32) SetPROM_16K_Bank(6, PROM_BASE + 16 - 1);
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}
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else
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{
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// PRG 16K bank ($C000-$FFFF)
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SetPROM_16K_Bank(6, PROM_BASE + (reg[3] & 0x0F));
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if (PROM_16K_SIZE >= 32) SetPROM_16K_Bank(4, PROM_BASE);
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}
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}
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}
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}
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//void Mapper001::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg[0];
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p[1] = reg[1];
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p[2] = reg[2];
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p[3] = reg[3];
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p[4] = shift;
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p[5] = regbuf;
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p[6] = wram_bank;
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p[7] = wram_count;
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}
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//void Mapper001::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg[0] = p[0];
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reg[1] = p[1];
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reg[2] = p[2];
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reg[3] = p[3];
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shift = p[4];
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regbuf = p[5];
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wram_bank = p[6];
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wram_count = p[7];
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}
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public override bool IsStateSave()
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{
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return true;
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}
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}
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}
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