robert@fear.UUCP (Robert Plamondon) (08/21/85)
I got another 128k RAM board for my Tandy 2000, bought eighteen 64k
dynamic RAMs at Fry's Electronics (150ns, 59 cents each), and plugged
them in. It worked fine -- it turns out that the second RAM board
(the one that moves you from 512k to 768k) works correctly with the
jumpers set according to the instructions.
For those of you who may have missed my first posting, the Tandy 128k
External RAM board can be expanded to 256k by simply plugging RAM
chips into the empty sockets. On the first board, ignore Tandy's
instructions and leave the jumper between points E and F in place.
On the second board, follow Tandy's instructions.
If you have any bad RAM chips on the boards, the new memory will not
appear on the "Memory Size" display on power-up. If you get some
extra RAMs it's easier to locate the bad chips. (Of course, the bad
RAMs I had were and `under-the-counter special' -- commercial RAM
chips have a greater tendency to work.)
I'm running 400k of RAM-Disk with plenty of room left over for my
applications. Heaven! The RAM disk, by the way, is buried in Tandy's
software catalog under the Tandy 1000 stuff, but it runs on the Tandy
2000 as well. It's cheap, too: $25 or $30, I think.
--
Robert Plamondon
{turtlevax, resonex, cae780}!weitek!robert