56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper057 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper057::Reset()
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{
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SetPROM_32K_Bank( 0, 1, 0, 1 );
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SetVROM_8K_Bank( 0 );
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reg = 0;
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}
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void Mapper057::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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case 0x8001:
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case 0x8002:
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case 0x8003:
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if( data & 0x40 ) {
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SetVROM_8K_Bank( (data&0x03)+((reg&0x10)>>1)+(reg&0x07) );
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}
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break;
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case 0x8800:
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reg = data;
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if( data & 0x80 ) {
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SetPROM_8K_Bank( 4, ((data & 0x40)>>6)*4+8+0 );
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SetPROM_8K_Bank( 5, ((data & 0x40)>>6)*4+8+1 );
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SetPROM_8K_Bank( 6, ((data & 0x40)>>6)*4+8+2 );
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SetPROM_8K_Bank( 7, ((data & 0x40)>>6)*4+8+3 );
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} else {
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SetPROM_8K_Bank( 4, ((data & 0x60)>>5)*2+0 );
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SetPROM_8K_Bank( 5, ((data & 0x60)>>5)*2+1 );
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SetPROM_8K_Bank( 6, ((data & 0x60)>>5)*2+0 );
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SetPROM_8K_Bank( 7, ((data & 0x60)>>5)*2+1 );
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}
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SetVROM_8K_Bank( (data&0x07)+((data&0x10)>>1) );
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if( data & 0x08 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else SetVRAM_Mirror( VRAM_VMIRROR );
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break;
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}
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}
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void Mapper057::SaveState( LPBYTE p )
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{
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p[0] = reg;
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}
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void Mapper057::LoadState( LPBYTE p )
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{
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reg = p[0];
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}
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