48 lines
971 B
C++
48 lines
971 B
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper041 Caltron 6-in-1 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper041::Reset()
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{
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reg[0] = reg[1] = 0;
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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 Mapper041::WriteLow( WORD addr, BYTE data )
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{
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if( addr >= 0x6000 && addr < 0x6800 ) {
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SetPROM_32K_Bank( addr&0x07 );
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reg[0] = addr & 0x04;
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reg[1] &= 0x03;
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reg[1] |= (addr>>1)&0x0C;
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SetVROM_8K_Bank( reg[1] );
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if( addr&0x20 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else SetVRAM_Mirror( VRAM_VMIRROR );
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}
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}
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void Mapper041::Write( WORD addr, BYTE data )
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{
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if( reg[0] ) {
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reg[1] &= 0x0C;
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reg[1] |= addr & 0x03;
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SetVROM_8K_Bank( reg[1] );
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}
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}
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void Mapper041::SaveState( LPBYTE p )
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{
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p[0] = reg[0];
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p[1] = reg[1];
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}
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void Mapper041::LoadState( LPBYTE p )
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{
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reg[0] = p[0];
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reg[1] = p[1];
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}
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