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/***************************************************************************
NEC uPD4990A
Serial I/O Calendar & Clock IC
***************************************************************************/
#ifndef __PD4990A_OLD_H__
#define __PD4990A_OLD_H__
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
class upd4990a_old_device : public device_t
{
public:
upd4990a_old_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~upd4990a_old_device() {}
/* this should be refactored, once RTCs get unified */
void addretrace();
DECLARE_READ8_MEMBER( testbit_r );
DECLARE_READ8_MEMBER( databit_r );
DECLARE_WRITE16_MEMBER( control_16_w );
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
private:
// internal state
int m_seconds; /* seconds BCD */
int m_minutes; /* minutes BCD */
int m_hours; /* hours BCD */
int m_days; /* days BCD */
int m_month; /* month Hexadecimal form */
int m_year; /* year BCD */
int m_weekday; /* weekday BCD */
UINT32 m_shiftlo;
UINT32 m_shifthi;
int m_retraces; /* Assumes 60 retraces a second */
int m_testwaits;
int m_maxwaits; /* Switch test every frame*/
int m_testbit; /* Pulses a bit in order to simulate test output */
int m_outputbit;
int m_bitno;
INT8 m_reading;
INT8 m_writing;
int m_clock_line;
int m_command_line; //??
void increment_month();
void increment_day();
void readbit();
void resetbitstream();
void writebit( UINT8 bit );
void nextbit();
UINT8 getcommand();
void update_date();
void process_command();
void serial_control( UINT8 data );
};
extern ATTR_DEPRECATED const device_type UPD4990A_OLD;
#define MCFG_UPD4990A_OLD_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, UPD4990A_OLD, 0)
#endif /*__PD4990A_H__*/
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