> I cannot find a datasheet for either of these chips (yes, google has fail=
ed
> me) and it would be greatly appreciated if someone could send me a link t=
o
> it
>=20
> also would fall more so under the category of [OT] ?

If time is no object, rent, borrow or build a chip identifier. 25 years ago
that's exactly what technicians used to work around the problem you have no=
w in
service work. A chip identifier is a box with a socket where you insert the=
 chip
and it will ID it. Usually they will find any 4000 and 74xx series logic ch=
ips
and a lot more. PC based and non PC based versions exist(ed). You can proba=
bly
find a schematic or a used one somewhere. I assume they are worth pennies n=
ow.
Expect a desktop calculator sized box with a socket on it and a display.

Here's an example: http://www.8051projects.info/proj.asp?ID=3D73

Some are MUCH more elaborate and also program chips while they're at it (EE=
PROM
PIC etc).

good luck,

-- Peter


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