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From: dyer@harvard.UUCP (Steve Dyer)
Newsgroups: net.micro.pc
Subject: Re: Weirdness in the PCjr - faster than normal 'bug'.
Message-ID: <646@harvard.UUCP>
Date: Sat, 25-Jan-86 14:21:01 EST
Article-I.D.: harvard.646
Posted: Sat Jan 25 14:21:01 1986
Date-Received: Sun, 26-Jan-86 17:19:55 EST
References: <11540@ucbvax.berkeley.edu.BERKELEY.EDU>
Organization: Aiken Comp Lab, Harvard
Lines: 11

This is an educated guess, but I assume that the Supercalc package may
have a 'terminate and stay resident' portion which then causes any
further programs to be loaded above the lower 128K of memory which
must be shared with the video display circuitry (this only holds true
if your friend's PCJr has additional memory above 128K.)  Memory in
the 0 - 128K range is much 'slower' due to the display circuitry's need
for the addition of 2 extra wait states per memory access.
-- 
/Steve Dyer
dyer@harvard.harvard.edu
harvard!dyer