53 lines
2.8 KiB
C++
53 lines
2.8 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper225 72-in-1 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper225::Reset()
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{
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SetPROM_32K_Bank( 0, 1, 2, 3 );
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if( VROM_1K_SIZE ) {
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SetVROM_8K_Bank( 0 );
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}
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}
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void Mapper225::Write( WORD addr, BYTE data )
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{
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BYTE prg_bank = (addr & 0x0F80) >> 7;
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BYTE chr_bank = addr & 0x003F;
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SetVROM_1K_Bank(0,(chr_bank*8+0));
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SetVROM_1K_Bank(1,(chr_bank*8+1));
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SetVROM_1K_Bank(2,(chr_bank*8+2));
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SetVROM_1K_Bank(3,(chr_bank*8+3));
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SetVROM_1K_Bank(4,(chr_bank*8+4));
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SetVROM_1K_Bank(5,(chr_bank*8+5));
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SetVROM_1K_Bank(6,(chr_bank*8+6));
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SetVROM_1K_Bank(7,(chr_bank*8+7));
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if( addr & 0x2000 ) {
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SetVRAM_Mirror( VRAM_HMIRROR );
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} else {
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SetVRAM_Mirror( VRAM_VMIRROR );
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}
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if( addr & 0x1000 ) {
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// 16KBbank
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if( addr & 0x0040 ) {
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SetPROM_8K_Bank(4,(prg_bank*4+2));
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SetPROM_8K_Bank(5,(prg_bank*4+3));
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SetPROM_8K_Bank(6,(prg_bank*4+2));
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SetPROM_8K_Bank(7,(prg_bank*4+3));
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} else {
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SetPROM_8K_Bank(4,(prg_bank*4+0));
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SetPROM_8K_Bank(5,(prg_bank*4+1));
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SetPROM_8K_Bank(6,(prg_bank*4+0));
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SetPROM_8K_Bank(7,(prg_bank*4+1));
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}
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} else {
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SetPROM_8K_Bank(4,(prg_bank*4+0));
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SetPROM_8K_Bank(5,(prg_bank*4+1));
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SetPROM_8K_Bank(6,(prg_bank*4+2));
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SetPROM_8K_Bank(7,(prg_bank*4+3));
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}
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}
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