#ifndef _SUN3_INTERSIL_H
  #define _SUN3_INTERSIL_H
  /* bits 0 and 1 */
  #define INTERSIL_FREQ_32K        0x00
  #define INTERSIL_FREQ_1M         0x01
  #define INTERSIL_FREQ_2M         0x02
  #define INTERSIL_FREQ_4M         0x03
  
  /* bit 2 */
  #define INTERSIL_12H_MODE   0x00
  #define INTERSIL_24H_MODE   0x04
  
  /* bit 3 */
  #define INTERSIL_STOP            0x00
  #define INTERSIL_RUN             0x08
  
  /* bit 4 */
  #define INTERSIL_INT_ENABLE     0x10
  #define INTERSIL_INT_DISABLE    0x00
  
  /* bit 5 */
  #define INTERSIL_MODE_NORMAL     0x00
  #define INTERSIL_MODE_TEST       0x20
  
  #define INTERSIL_HZ_100_MASK	 0x02
  
  struct intersil_dt {
  	unsigned char	csec;
  	unsigned char	hour;
  	unsigned char	minute;
  	unsigned char	second;
  	unsigned char	month;
  	unsigned char	day;
  	unsigned char	year;
  	unsigned char	weekday;
  };
  
  struct intersil_7170 {
  	struct intersil_dt counter;
  	struct intersil_dt alarm;
  	unsigned char	int_reg;
  	unsigned char	cmd_reg;
  };
  
  extern volatile char* clock_va;
  #define intersil_clock ((volatile struct intersil_7170 *) clock_va)
  #define intersil_clear() (void)intersil_clock->int_reg
  #endif