Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!mailrus!usenet.ins.cwru.edu!shasta!garylee
From: garylee@shasta.scl.cwru.edu (Gary Lee)
Newsgroups: comp.sys.tandy
Subject: Re: Tandy 1000TX 128k upgrade.
Message-ID: <1990Mar9.052655.3215@usenet.ins.cwru.edu>
Date: 9 Mar 90 05:26:55 GMT
References: <17894@boulder.Colorado.EDU>
Reply-To: garylee@SCL.CWRU.Edu (Gary Lee)
Distribution: usa
Organization: Smith Undergrad Lab, CWRU, Cleve. OH
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In article <17894@boulder.Colorado.EDU> rasmusse@snoopy.Colorado.EDU (RASMUSSEN PETER BONHAM) writes:
>Is there any benefit to adding the 128k upgrade to the 1000TX? 
>The tech. ref. manual seems to say that this bank of drams resides 
>above 1 meg.  Does this mean it acts just like extended (expanded?) memory? 
>Can I really use this, and if so, where can a get the driver for it?  
>
>Thanks...
>Pete Rasmussen.
>Dept. of ECE, University of Colorado, Boulder.

Pete,

When you have an out-of-the-box TX it will steal about 16k of DOS memory for
video purposes. The last 128k is probly buffered through the video controller,
thus causing reduced performance. Before 80-Micro went belly-up, they reported
a 300% increase in screen writing performance, when using the extra memory.

And no, you cannot use it for extended or expanded memory. I suspect that the
768k reporting is how Tandy decided to indicate that the extra memory for the
video is installed.

Gary