AppleWin/source/6821.h

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