139 lines
5.1 KiB
C++
139 lines
5.1 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper095 Namcot 106M (Dragon Buster) //
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//////////////////////////////////////////////////////////////////////////
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void Mapper095::Reset()
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{
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reg = 0x00;
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prg0 = 0;
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prg1 = 1;
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SetBank_CPU();
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if( VROM_1K_SIZE ) {
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chr01 = 0;
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chr23 = 2;
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chr4 = 4;
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chr5 = 5;
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chr6 = 6;
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chr7 = 7;
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} else {
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chr01 = chr23 = chr4 = chr5 = chr6 = chr7 = 0;
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}
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SetBank_PPU();
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nes->SetRenderMethod( NES::POST_RENDER );
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}
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void Mapper095::Write( WORD addr, BYTE data )
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{
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switch( addr & 0xE001 ) {
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case 0x8000:
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reg = data;
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SetBank_CPU();
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SetBank_PPU();
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break;
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case 0x8001:
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if( reg <= 0x05 ) {
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if( data & 0x20 ) SetVRAM_Mirror( VRAM_MIRROR4H );
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else SetVRAM_Mirror( VRAM_MIRROR4L );
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data &= 0x1F;
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}
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switch( reg & 0x07 ) {
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case 0x00:
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if( VROM_1K_SIZE ) {
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chr01 = data & 0xFE;
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SetBank_PPU();
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}
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break;
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case 0x01:
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if( VROM_1K_SIZE ) {
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chr23 = data & 0xFE;
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SetBank_PPU();
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}
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break;
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case 0x02:
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if( VROM_1K_SIZE ) {
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chr4 = data;
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SetBank_PPU();
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}
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break;
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case 0x03:
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if( VROM_1K_SIZE ) {
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chr5 = data;
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SetBank_PPU();
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}
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break;
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case 0x04:
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if( VROM_1K_SIZE ) {
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chr6 = data;
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SetBank_PPU();
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}
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break;
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case 0x05:
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if( VROM_1K_SIZE ) {
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chr7 = data;
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SetBank_PPU();
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}
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break;
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case 0x06:
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prg0 = data;
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SetBank_CPU();
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break;
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case 0x07:
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prg1 = data;
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SetBank_CPU();
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break;
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}
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break;
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}
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}
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void Mapper095::SetBank_CPU()
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{
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if( reg & 0x40 ) {
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SetPROM_32K_Bank( PROM_8K_SIZE-2, prg1, prg0, PROM_8K_SIZE-1 );
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} else {
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SetPROM_32K_Bank( prg0, prg1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
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}
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}
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void Mapper095::SetBank_PPU()
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{
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if( VROM_1K_SIZE ) {
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if( reg & 0x80 ) {
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SetVROM_8K_Bank( chr4, chr5, chr6, chr7,
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chr01, chr01+1, chr23, chr23+1 );
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} else {
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SetVROM_8K_Bank( chr01, chr01+1, chr23, chr23+1,
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chr4, chr5, chr6, chr7 );
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}
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}
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}
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void Mapper095::SaveState( LPBYTE p )
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{
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p[0] = reg;
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p[1] = prg0;
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p[2] = prg1;
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p[3] = chr01;
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p[4] = chr23;
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p[5] = chr4;
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p[6] = chr5;
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p[7] = chr6;
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p[8] = chr7;
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}
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void Mapper095::LoadState( LPBYTE p )
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{
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reg = p[0];
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prg0 = p[1];
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prg1 = p[2];
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chr01 = p[3];
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chr23 = p[4];
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chr4 = p[5];
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chr5 = p[6];
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chr6 = p[7];
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chr7 = p[8];
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}
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