View Full Version : How does the clock on the PC keep time when unplugged?


Orkrist the Cleaver
Fri, 10th Aug '01, 12:03am
So, when you turn off the computer and unplug it, then do the reverse, how does the clock keep time? What powers it? Just wondering...

Slappy
Fri, 10th Aug '01, 12:06am
Tal's magic is all powerfull.........


Just joking, still I'm not sure if you are joking or no so here's a clue.

what gives your watch the power to keep telling the right time?

Orkrist the Cleaver
Fri, 10th Aug '01, 12:15am
I was being serious actually. I didn't think there was battery in there.

Blackthorne TA
Fri, 10th Aug '01, 12:19am
Yep, and it will need to be replaced eventually. Though you may have a new computer by then.

I have and old Pentium 120. In that thing both the clock and the CMOS for the configuration is kept powered by the battery. And guess what I discovered when it finally went bad? It was soldered to the motherboard! I had to break out my soldering iron and perform minor surgery to replace it!

kemanmaldea
Fri, 10th Aug '01, 1:40am
Yes indeed there is a little (well maybe not so little) battery in you computer that keeps its clock ticking when it is unpluged or if you have an older macine with a real swich turned off. In my experiance the battery last as long as the computer unless you are into upgrading it and are solderd on to the motherboard (even then you may never have to replace the battery).

Sir Belisarius
Fri, 10th Aug '01, 3:53am
Nuclear Power

Orkrist the Cleaver
Fri, 10th Aug '01, 4:03am
For some reason, that wouldn't surprise me.

Messala
Fri, 10th Aug '01, 4:57am
Hey Orkrist, long time no see. :D
Microsoft iserts an Imp into every version of windows they sell.
Linux users get gremlins, thats why it doesnt work half the time. :D

[This message has been edited by Messala (edited August 10, 2001).]

PowerPuff
Fri, 10th Aug '01, 9:03am
I always thought Linux users had penguins? :p

BogiTheWaverer
Fri, 10th Aug '01, 10:02am
Linux user can replace the CMOS battery with
a tiny treadmill for one or two microtux penguins.
If you feed them well that will last longer than every battery. :D

Sapiryl
Fri, 10th Aug '01, 6:18pm
I have a 386 machine with a 66 mhz processor. And the battery still works fine.

What do Mac users get? I don't think apples could run that fast.