39 lines
740 B
C++
39 lines
740 B
C++
#ifdef _NES_MAPPER_CPP_
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/////////////////////////////////////////////////////////////////////
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// Mapper 97
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void NES_mapper97::Reset()
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{
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// set CPU bank pointers
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set_CPU_banks(num_8k_ROM_banks-2,num_8k_ROM_banks-1,0,1);
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// set PPU bank pointers ?
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if(num_1k_VROM_banks)
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{
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set_PPU_banks(0,1,2,3,4,5,6,7);
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}
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}
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void NES_mapper97::MemoryWrite(uint32 addr, uint8 data)
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{
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if(addr < 0xC000)
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{
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uint8 prg_bank = data & 0x0F;
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set_CPU_bank6(prg_bank*2+0);
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set_CPU_bank7(prg_bank*2+1);
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if((data & 0x80) == 0)
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{
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set_mirroring(NES_PPU::MIRROR_HORIZ);
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}
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else
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{
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set_mirroring(NES_PPU::MIRROR_VERT);
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}
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}
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}
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/////////////////////////////////////////////////////////////////////
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#endif
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