scott@max.u.washington.edu (04/12/90)
How do I expand my memory if I currently got a 8 meg expandable mother board with 1 meg mem consist of 36 256k 1 bit mem chip already installed? I want to expand it to 4 meg so that I can run os/2 or xenix. But it seems that there isn't enough sockets to accomodate the addition 3 meg of 256k 1 bit chips. Does this means I have to replace all the 256k 1 bit chips with 256k 1byte mem. chips? Sincerely, Scott K. Stephen
cs4g6ag@maccs.dcss.mcmaster.ca (Stephen M. Dunn) (04/13/90)
In article <13602.26231fdc@max.u.washington.edu> scott@max.u.washington.edu writes:
$How do I expand my memory if I currently got a 8 meg expandable mother
$board with 1 meg mem consist of 36 256k 1 bit mem chip already installed?
$I want to expand it to 4 meg so that I can run os/2 or xenix.
$But it seems that there isn't enough sockets to accomodate the addition
$3 meg of 256k 1 bit chips. Does this means I have to replace all the
$256k 1 bit chips with 256k 1byte mem. chips?
Many motherboards these days are made so that you can have up to 1 or
2M of RAM using 256k x 1 chips, but if you want to add more, you have to
rip them all out and start again with 1M x 1 chips. My 286 was like
that - to upgrade from 640k to 1M, I had to swallow 18 4164s, and to upgrade
from 1M to 2M or 4M I would have had to swallow 36 256k x 1 chips.
You'll have to look in the manual for your machine to be sure, but
I'd guess that you'll have to buy 511000s (I think that's the right
number), which are 1M x 1 bit, and try to get rid of your old chips.
If your machine has those strange sockets that have holes in them in
a pattern similar to the following:
o o
o o
o o o o
o o o o
o o o o
o o o o
o o o o
o o o o
o o o o
o o o o
o o o o
(I'm not sure if I got the number of holes right) and your current chips
are installed in the shorter set of holes, then chances are pretty good
that you'll have to replace them with 1M chips in the longer set. You'll
also have to run the setup program again, and probably change the position
of some jumpers or DIP switches on your motherboard.
--
More half-baked ideas from the oven of:
****************************************************************************
Stephen M. Dunn cs4g6ag@maccs.dcss.mcmaster.ca
<std_disclaimer.h> = "\nI'm only an undergraduate ... for now!\n";