#include <stdio.h>
#include <stdlib.h>
#include <dos.h>

void main(void)
 {
   struct CMOS 
   {
     unsigned char current_second;
     unsigned char alarm_second;
     unsigned char current_minute;
     unsigned char alarm_minute;
     unsigned char current_hour;
     unsigned char alarm_hour;
     unsigned char current_day_of_week;
     unsigned char current_day;
     unsigned char current_month;
     unsigned char current_year;
     unsigned char status_registers[4];
     unsigned char diagnostic_status;
     unsigned char shutdown_code;
     unsigned char drive_types;
     unsigned char reserved_x;
     unsigned char disk_1_type;
     unsigned char reserved;
     unsigned char equipment;
     unsigned char lo_mem_base;
     unsigned char hi_mem_base;
     unsigned char hi_exp_base;
     unsigned char lo_exp_base;
     unsigned char fdisk_0_type;
     unsigned char fdisk_1_type;
     unsigned char reserved_2[19];
     unsigned char hi_check_sum;
     unsigned char lo_check_sum;
     unsigned char lo_actual_exp;
     unsigned char hi_actual_exp;
     unsigned char century;
     unsigned char information;
     unsigned char reserved3[12];
   } cmos;

   char i;
   char *pointer;
   char byte;

   pointer = (char *) &cmos;

   for (i = 0; i < 0x34; i++)
    {
      outportb(0x70, i);
      byte = inportb(0x71);         
      *pointer++ = byte;
    }

   printf("Current date %d/%d/%d\n", cmos.current_month,
     cmos.current_day, cmos.current_year);
   printf("Current time %d:%d:%d\n", cmos.current_hour,
     cmos.current_minute, cmos.current_second);
   printf("Hard disk type %d\n", cmos.fdisk_0_type);
  }