Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!usc!snorkelwacker!bloom-beacon!eru!hagbard!sunic!news.funet.fi!funic!santra!news
From: gson@niksula.hut.fi (Andreas Gustafsson)
Newsgroups: comp.sys.handhelds
Subject: Re: Display offset in CHIP48 and BRIX with rev A rom
Summary: Libraries may cause the problem
Keywords: CHIP48, BRIX
Message-ID: <1990Sep15.082602.13816@santra.uucp>
Date: 15 Sep 90 08:26:02 GMT
References: <2124@bnlux0.bnl.gov>
Sender: news@santra.uucp (Cnews - USENET news system)
Reply-To: gson@niksula.hut.fi (Andreas Gustafsson)
Organization: Helsinki University of Technology, Finland
Lines: 21

In <2124@bnlux0.bnl.gov> degen@bnlux0.bnl.gov (christopher degen) writes:
> My HP-48, is a rev A rom, and I have the shifted graphics display
> problem with CHIP48 and BRIX. I downloaded the ->ASC versions, and I got
> the correct checksums. What's up???

I have been informed that the HP48SX display RAM is not at a fixed
memory location (as CHIP48 currently assumes), but moves when
libraries are attached and perhaps also under other circumstances.
This would explain the display wrapping problem.

It seems most people who use libraries have rev D ROMs, perhaps
because of HP:s free equation card offer.  This explains why
the problem has mostly affected people with the D ROM (the referred
article being the exception).

For now, try removing all libraries from the calculator.  I intend to
post a fixed version of CHIP48 in a few days.
-- 
Andreas Gustafsson
Internet: gson@niksula.hut.fi
Voice: +358 0 563 5592