69 lines
1.4 KiB
C++
69 lines
1.4 KiB
C++
// Motorola MC6821 PIA
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typedef void (*mem_write_handler) (void* objFrom, void* objTo, int nAddr, BYTE byData);
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typedef struct _STWriteHandler
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{
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void* objTo;
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mem_write_handler func;
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} STWriteHandler;
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//
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#define PIA_DDRA 0
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#define PIA_CTLA 1
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#define PIA_DDRB 2
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#define PIA_CTLB 3
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class C6821
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{
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public:
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C6821();
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virtual ~C6821();
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BYTE GetPB();
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BYTE GetPA();
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void SetPB(BYTE byData);
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void SetPA(BYTE byData);
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void SetCA1( BYTE byData );
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void SetCA2( BYTE byData );
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void SetCB1( BYTE byData );
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void SetCB2( BYTE byData );
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void Reset();
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BYTE Read( BYTE byRS );
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void Write( BYTE byRS, BYTE byData );
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void UpdateInterrupts();
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void SetListenerA( void *objTo, mem_write_handler func );
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void SetListenerB( void *objTo, mem_write_handler func );
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void SetListenerCA2( void *objTo, mem_write_handler func );
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void SetListenerCB2( void *objTo, mem_write_handler func );
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protected:
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BYTE m_byIA;
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BYTE m_byCA1;
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BYTE m_byICA2;
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BYTE m_byOA;
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BYTE m_byOCA2;
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BYTE m_byDDRA;
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BYTE m_byCTLA;
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BYTE m_byIRQAState;
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BYTE m_byIB;
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BYTE m_byCB1;
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BYTE m_byICB2;
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BYTE m_byOB;
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BYTE m_byOCB2;
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BYTE m_byDDRB;
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BYTE m_byCTLB;
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BYTE m_byIRQBState;
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STWriteHandler m_stOutA;
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STWriteHandler m_stOutB;
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STWriteHandler m_stOutCA2;
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STWriteHandler m_stOutCB2;
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STWriteHandler m_stOutIRQA;
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STWriteHandler m_stOutIRQB;
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};
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