31 lines
858 B
C
31 lines
858 B
C
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//////////////////////////////////////////////////////////////////////////
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// Mapper121 //
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//////////////////////////////////////////////////////////////////////////
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class Mapper121 : public Mapper
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{
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public:
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Mapper121( NES* parent ) : Mapper(parent) {}
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void Reset();
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BYTE ReadLow( WORD addr );
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void WriteLow(WORD addr, BYTE data);
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void Write(WORD addr, BYTE data);
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void HSync(INT scanline);
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protected:
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BYTE EXPREGS[8];
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BYTE MMC3cmd;
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BYTE DRegBuf[8];
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BYTE A000B, A001B;
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BYTE IRQCount, IRQLatch, IRQa, IRQReload;
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private:
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void MMC3CMDWrite(WORD A, BYTE V);
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void MMC3MIRWrite(WORD A, BYTE V);
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void MMC3IRQWrite(WORD A, BYTE V);
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void SetDATA();
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void PPUSW( WORD addr, BYTE data );
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void CPUSW( WORD addr, BYTE data );
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void Fix121MMC3PRG(BYTE data);
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void Fix121MMC3CHR(BYTE data);
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};
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