41 lines
904 B
C++
41 lines
904 B
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper175 15-in-1 (Kaiser) //
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//////////////////////////////////////////////////////////////////////////
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void Mapper175::Reset()
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{
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SetPROM_16K_Bank( 4, 0 );
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SetPROM_16K_Bank( 6, 0 );
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reg_dat = 0;
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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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BYTE Mapper175::Read( WORD addr)
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{
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if( addr == 0xFFFC ) {
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SetPROM_16K_Bank( 4, reg_dat & 0x0F );
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SetPROM_8K_Bank( 6, (reg_dat & 0x0F)*2 );
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}
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return CPU_MEM_BANK[addr>>13][addr&0x1FFF];
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}
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void Mapper175::Write( WORD addr, BYTE data )
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{
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switch( addr ) {
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case 0x8000:
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if( data & 0x04 ) {
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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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break;
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case 0xA000:
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reg_dat = data;
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SetPROM_8K_Bank( 7, (reg_dat & 0x0F)*2+1 );
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SetVROM_8K_Bank( reg_dat & 0x0F );
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break;
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}
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}
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