Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!mailrus!umix!umich!mibte!gamma!ulysses!thumper!faline!bellcore!clyde!watmath!orchid!bamcpherson
From: bamcpherson@orchid.waterloo.edu (Brent)
Newsgroups: comp.sys.hp
Subject: HP-28
Message-ID: <12364@orchid.waterloo.edu>
Date: 23 Mar 88 20:54:40 GMT
Distribution: comp
Organization: U of Waterloo, Ontario
Lines: 22
Keywords: info

I am going to be buying an HP-28S (as soon as I get my tax return) 
and have read a few articles on the HP-28 line. Consequently I have a
few questions about the HP-28:

	1. I have heard mention of various books on customizing
	   the HP-28. Where can these books be obtained?

	2. What type of machine language does the HP-28 use and 
	   is there any documentation or books that
	   describe the opcodes and their format (in hex)?

	3. How is the screen memory organized and can it be written
	   to? Also, is there several screen modes such as
	   text and/or graphics?

Excuse me if these questions sound stupid since I do not yet own an HP-28
and have not tried one. It sounds like it would be a great toy to hack
around with.

Thanks in advance... ;-)
--
Brent