Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!bellcore!texbell!merch!cpe!hal6000!trsvax!reyn
From: reyn@trsvax.UUCP
Newsgroups: comp.sys.tandy
Subject: Re: Tandy 1000SL memory upgrade
Message-ID: <193300156@trsvax>
Date: 19 Jul 89 13:36:00 GMT
References: <440@mountn.dec.com>
Lines: 18
Nf-ID: #R:mountn.dec.com:440:trsvax:193300156:000:781
Nf-From: trsvax.UUCP!reyn    Jul 19 08:36:00 1989


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

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