51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper004 Nintendo MMC3 //
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//////////////////////////////////////////////////////////////////////////
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class Mapper004 : public Mapper
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{
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public:
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Mapper004( 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 Clock( INT cycles );
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void HSync( INT scanline );
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// For state save
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BOOL IsStateSave() { return TRUE; }
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void SaveState( LPBYTE p );
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void LoadState( LPBYTE p );
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protected:
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BYTE reg[8];
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BYTE prg0, prg1;
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BYTE chr01, chr23, chr4, chr5, chr6, chr7;
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BYTE we_sram;
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BYTE rom_type; //for "Contra Fighter (Unl) [U]"
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BYTE security;
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BYTE KT_bank; //for KT CN games
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WORD temp1;
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BYTE irq_type;
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BYTE irq_enable;
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BYTE irq_counter;
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BYTE irq_latch;
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BYTE irq_request;
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BYTE irq_preset;
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BYTE irq_preset_vbl;
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BYTE vs_patch;
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BYTE vs_index;
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private:
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void SetBank_CPU();
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void SetBank_PPU();
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void SetBank_PPUSUB( int bank, int page );
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};
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