298 lines
6.8 KiB
C++
298 lines
6.8 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper001 Nintendo MMC1 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper001::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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SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
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} else {
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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 ) {
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// SetVROM_8K_Bank( 0 );
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}
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DWORD crc = nes->rom->GetPROM_CRC();
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if( crc == 0xb8e16bd0 ) { // 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 ) { // Venus Senki(J)
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nes->SetRenderMethod( NES::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 ) { // Night Rider(J)
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nes->SetRenderMethod( NES::TILE_RENDER );
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}
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if( crc == 0xcd2a73f0 ) { // Pirates!(U)
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nes->SetRenderMethod( NES::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 ) { // Viva! Las Vegas(J)
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}
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if( crc == 0xd878ebf5 ) { // Ninja Ryukenden(J)
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nes->SetRenderMethod( NES::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 ) { // Final Fantasy(J)
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nes->SetRenderMethod( NES::TILE_RENDER );
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nes->ppu->SetExtMonoMode( TRUE );
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}
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if( crc == 0xc9556b36 ) { // Final Fantasy I&II(J)
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nes->SetRenderMethod( NES::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 ) { // Cosmic Wars(J)
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nes->SetRenderMethod( NES::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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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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void Mapper001::Write( WORD addr, BYTE data )
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{
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if( wram_patch == 1 && addr == 0xBFFF ) {
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DEBUGOUT( "MMC1 %04X=%02X\n", addr&0xFFFF,data&0xFF );
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wram_count++;
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wram_bank += data&0x01;
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if( wram_count == 5 ) {
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if( wram_bank ) {
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SetPROM_Bank( 3, &WRAM[0x2000], BANKTYPE_RAM );
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} else {
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SetPROM_Bank( 3, &WRAM[0x0000], 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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if((addr & 0x6000) != (last_addr & 0x6000)) {
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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 ) {
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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 <20>c<EFBFBD><63><EFBFBD>̓<EFBFBD><CD83>Z<EFBFBD>b<EFBFBD>g<EFBFBD><67><EFBFBD><EFBFBD><EFBFBD>Ȃ<EFBFBD>
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return;
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}
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if( data&0x01 ) regbuf |= 1<<shift;
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if( ++shift < 5 )
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return;
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addr = (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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// For Normal Cartridge
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switch( addr ) {
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case 0:
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if( reg[0] & 0x02 ) {
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if( reg[0] & 0x01 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else SetVRAM_Mirror( VRAM_VMIRROR );
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} else {
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if( reg[0] & 0x01 ) 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 ) {
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if( reg[0] & 0x10 ) {
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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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} else {
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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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} else {
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// For Romancia
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if( reg[0] & 0x10 ) {
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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 ) {
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if( reg[0] & 0x10 ) {
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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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} else {
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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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} else {
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// For Romancia
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if( reg[0] & 0x10 ) {
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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) ) {
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// PRG 32K bank ($8000-$FFFF)
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SetPROM_32K_Bank( reg[3]>>1 );
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} else {
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if( reg[0] & 0x04 ) {
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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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} else {
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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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} else {
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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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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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if( !(reg[1] & 0x18) ) {
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SetPROM_Bank( 3, &WRAM[0x0000], BANKTYPE_RAM );
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} else {
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SetPROM_Bank( 3, &WRAM[0x2000], 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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if( reg[0] & 0x02 ) {
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if( reg[0] & 0x01 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else SetVRAM_Mirror( VRAM_VMIRROR );
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} else {
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if( reg[0] & 0x01 ) 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 ) {
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if( reg[0] & 0x10 ) {
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank( 0, reg[1] );
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} else {
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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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} else {
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// For Romancia
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if( reg[0] & 0x10 ) {
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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 ) {
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if( reg[0] & 0x10 ) {
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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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// For Romancia
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if( reg[0] & 0x10 ) {
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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) ) {
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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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} else {
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if( reg[0] & 0x04 ) {
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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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} else {
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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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{
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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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{
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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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