Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!magnus.ircc.ohio-state.edu!news
From: fseipel@hpuxa.ircc.ohio-state.edu (Frank E. Seipel)
Newsgroups: comp.sys.handhelds
Subject: HP48 Questions
Message-ID: <1991Feb21.035015.8829@magnus.ircc.ohio-state.edu>
Date: 21 Feb 91 03:50:15 GMT
Sender: news@magnus.ircc.ohio-state.edu
Organization: The Ohio State University
Lines: 14
Originator: fseipel@hpuxa.ircc.ohio-state.edu
Nntp-Posting-Host: hpuxa.ircc.ohio-state.edu

Concerning RAM cards: I tried a Smith Corona 32K card at Sears today. The
LCD displayed a 'melting' pattern upon turning on the calculator. Even after
pulling out the card the calculator would not reset; I had to remove the
batteries. Several users have reported success with these cards; is there
something I am doing wrong? Do you have to modify the card to make it work
in the 48SX?

I am interesting in doing some machine language programming on the 48. I
am using a Macintosh and a program called SASS. I was able to make SASS
assemble the sample program patterns.s, and then x-ferred it to the 48SX.
I then executed \->SYS. The program ran, but the calculator display went
blank after a few seconds, then the memory was lost. I did not alter the
source code in any way. What did I do wrong here, and what do I need
(software, books, etc) to start programming in machine code on the 48SX?