www.pudn.com > IBM-PC CMOS.zip > CMOSSET.C

/* CMOSSET.C - Set IBM PC/AT's Real-time Clock/CMOS RAM information 
 
   Jim Cronin  2-86 
*/ 
 
#include  
#define IOADDRESS 0x070 
#define IODATA    0x071 
 
main () 
{ 
   unsigned char location, value; 
   extern unsigned char inportb(); 
 
   for ( ; ; ) 
       { 
       printf ("Location: "); 
       if (! scanf ("%x", &location)) break; 
 
       outportb (IOADDRESS, location); 
       value = inportb (IODATA); 
       printf ("Was: %02x set to: ", value); 
       if (! scanf ("%x", &value)) break; 
 
       outportb (IOADDRESS, location); 
       outportb (IODATA, value); 
       } 
}