19 Oct
1998
19 Oct
'98
9:07 a.m.
Marvin wrote:
In rummage through the dark recesses of my garage (too densly packed to let
in light) I again ran across an IBM AT motherboard that used the piggyback
memory chips. Were there any other computers that used these things? Also,
does anyone know the numbers of the two chips that were soldered together?
Well, before the official version came out, lots of TRS-80 Color
Computers were upgraded from 16k to 32k via piggybacking, since
4164 RAMS were so much more expensive than doubled-up 4116's. Note
that this was _not_ supported by Tandy Corporation, but the first
one I saw was done in the repair shop of the Radio Shack Computer
Center where I was teaching at the time. I seem to recall that a
few Sinclairs were upgraded similarly, though it made it hard to get
the case back together.
--
Ward Griffiths <mailto:gram@cnct.com> <http://www.cnct.com/home/gram/>
When I was crossing the border into Canada, they asked me if I had any
firearms with me. I said "Well, what do you need?" -- Steven Wright