Dallas clock battery

[Chuck Guzis]

On 12/29/2005 at 6:31 PM Scott Stevens wrote:

>Some of us are just more stubborn and cheap (and whatnot else)
>than others.  I like solutions that I know I will be able to use
>for the next 25 years.  I don't know how long Dallas will
>continue to make the DS1285.  And I have encountered motherboards
>where the CMOS module is SOLDERED ON THE MOTHERBOARD (*yikes*).

Scott, the Compaq SLT 286 is one of those. :)    (and of course, on modern
mobos, the CMOS and clock is buried somewhere on a corner of one of the
support chips, which is soldered in).

If you're really bored, you can try digging into a DS1287, like this guy:

http://perso.wanadoo.fr/dsavel/ds1287e.htm

Suprise, suprise, he found a 1285 inside!

Another alternative is to use an MC 146818A and external battery and
resonator.  

Cheers,
Chuck