44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
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//////////////////////////////////////////////////////////////////////////
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// Mapper227 1200-in-1 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper227::Reset()
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{
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SetPROM_32K_Bank( 0, 1, 0, 1 );
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}
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void Mapper227::Write( WORD addr, BYTE data )
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{
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BYTE bank = ((addr&0x0100)>>4)|((addr&0x0078)>>3);
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if( addr & 0x0001 ) {
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SetPROM_32K_Bank( bank );
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} else {
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if( addr & 0x0004 ) {
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SetPROM_8K_Bank( 4, bank*4+2 );
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SetPROM_8K_Bank( 5, bank*4+3 );
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SetPROM_8K_Bank( 6, bank*4+2 );
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SetPROM_8K_Bank( 7, bank*4+3 );
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} else {
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SetPROM_8K_Bank( 4, bank*4+0 );
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SetPROM_8K_Bank( 5, bank*4+1 );
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SetPROM_8K_Bank( 6, bank*4+0 );
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SetPROM_8K_Bank( 7, bank*4+1 );
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}
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}
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if( !(addr & 0x0080) ) {
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if( addr & 0x0200 ) {
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SetPROM_8K_Bank( 6, (bank&0x1C)*4+14 );
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SetPROM_8K_Bank( 7, (bank&0x1C)*4+15 );
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} else {
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SetPROM_8K_Bank( 6, (bank&0x1C)*4+0 );
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SetPROM_8K_Bank( 7, (bank&0x1C)*4+1 );
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}
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}
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if( addr & 0x0002 ) {
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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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}
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