42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper230 22-in-1 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper230::Reset()
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{
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if( rom_sw ) {
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rom_sw = 0;
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} else {
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rom_sw = 1;
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}
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if( rom_sw ) {
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SetPROM_32K_Bank( 0, 1, 14, 15 );
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} else {
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SetPROM_32K_Bank( 16, 17, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
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}
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}
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void Mapper230::Write( WORD addr, BYTE data )
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{
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if( rom_sw ) {
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SetPROM_8K_Bank( 4, (data&0x07)*2+0 );
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SetPROM_8K_Bank( 5, (data&0x07)*2+1 );
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} else {
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if( data & 0x20 ) {
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SetPROM_8K_Bank( 4, (data&0x1F)*2+16 );
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SetPROM_8K_Bank( 5, (data&0x1F)*2+17 );
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SetPROM_8K_Bank( 6, (data&0x1F)*2+16 );
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SetPROM_8K_Bank( 7, (data&0x1F)*2+17 );
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} else {
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SetPROM_8K_Bank( 4, (data&0x1E)*2+16 );
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SetPROM_8K_Bank( 5, (data&0x1E)*2+17 );
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SetPROM_8K_Bank( 6, (data&0x1E)*2+18 );
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SetPROM_8K_Bank( 7, (data&0x1E)*2+19 );
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}
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if( data & 0x40 ) {
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SetVRAM_Mirror( VRAM_VMIRROR );
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} else {
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SetVRAM_Mirror( VRAM_HMIRROR );
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}
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}
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}
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