shatara@memit.dec.com (Chris Shatara) (07/18/89)
My sisters and I recently bought our father a Tandy 1000SL and now want to upgrade from 384K of memory to 640K. Is there anything unique about the 64K x 4 memory chips. I purchsed 8 at my local electronics supply for $73, about half of what Tandy is asking for their upgrade. Are there any jumper that need to be removed/added to allow the machine to recognize the addional 256K of memory? (My folks live in Calif and I haven't physically laid my hands on the computer.....just getting ready all I want to do to it before I go out there.) A related question...In looking at the current issue of PCM, I notice many adds for Hard Cards where they specifically say .."add $20 for Tandy 1000 machines". Can anyone tell me whats so unique about the Tandy 1000 (SL,TL,etc) that would necessitate this $20 charge. I thought the machines were PC Compatible. And help or advice will be greatly appreciated. Regards, Chris -------------------------------------------------------------------- Chris Shatara shatara@memit.dec.com --or-- ...!decwrl!memit.dec.com!shatara --or-- shatara%memit.dec@decwrl.dec.com --------------------------------------------------------------------
reyn@trsvax.UUCP (07/19/89)
Chris,
The $20 that companies wish to charge you for Tandy 1000 compatible
hard cards probably has to do with the unfortunate use of IRQ2
instead of IRQ5 for the hard disk interrupt on older Tandy 1000s
such as the 1000 and 1000a. The SX and TX allow the interrupt to be
jumpered as either IRQ2 or IRQ5, and the SL and TL come configured
with the industry standard IRQ5 (you can change this if you really
want to).
You main concern should be that the card is short enough to fit in
your SL. Most of the mail order companies still have the 'Tandy
1000 compatible' feature offered because there are so many of the
old 1000s still clunking away.
John Reynolds
Standard disclaimer applies ... earl@trsvax.UUCP (07/21/89)
/* ---------- "Tandy 1000SL memory upgrade" ---------- */
My sisters and I recently bought our father a Tandy 1000SL and now want
to upgrade from 384K of memory to 640K. Is there anything unique about
the 64K x 4 memory chips. I purchsed 8 at my local electronics supply for
$73, about half of what Tandy is asking for their upgrade.
Are there any jumper that need to be removed/added to allow the machine to
recognize the addional 256K of memory?
And help or advice will be greatly appreciated.
Regards, Chris
--------------------------------------------------------------------
Chris Shatara shatara@memit.dec.com
--or-- ...!decwrl!memit.dec.com!shatara
--or-- shatara%memit.dec@decwrl.dec.com
--------------------------------------------------------------------
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
You should have no problem if the chips are 120 nanosecond delay types.
There are no jumpers, just plug the little guys in correctly, and the BIOS
Rom software will figure it out for you.
***********************************************************************
<This information is provided by an individual and is not nor should be
construed as being provided by Radio Shack or Tandy Corp. Radio
Shack/Tandy Corp has no obligation to support the information provided
in any way. >
Earl W. Bollinger
@ <trsvax!earl>