jimb@Portia.Stanford.EDU (Jim Bjorksten) (05/27/89)
It's driving me crazy. I set my IBM-AT internal clock every time on power it up. Nevertheless it slips a few minutes/day. Is there a way to adjust this. I thought the darn thing was crystal controlled. -Jim
henry@utzoo.uucp (Henry Spencer) (05/28/89)
In article <2536@Portia.Stanford.EDU> jimb@Portia.Stanford.EDU (Jim Bjorksten) writes: >It's driving me crazy. I set my IBM-AT internal clock every time on >power it up. Nevertheless it slips a few minutes/day. Is there a way >to adjust this. I thought the darn thing was crystal controlled. It almost certainly is. But there are crystals and there are crystals. Like most components, crystals come in different accuracies, and better ones cost more. Things like temperature changes and component aging will also affect accuracy; a good design will try to be relatively insensitive to them, but not all designs are good. In the PC market, cheap usually wins over good. There may be an adjustment capacitor near the crystal; there may not be. You might also try replacing the backup battery -- perhaps it is not giving quite the voltage it should. -- Van Allen, adj: pertaining to | Henry Spencer at U of Toronto Zoology deadly hazards to spaceflight. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu