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From: hoford@sequoia.circ.upenn.edu (John Hoford)
Newsgroups: comp.sys.handhelds
Subject: Re: Questions about hp48 machine language
Keywords: hp48, machine language, ml
Message-ID: <42247@netnews.upenn.edu>
Date: 29 Apr 91 22:05:09 GMT
Sender: news@netnews.upenn.edu
Organization: Cardiothoracic Imaging Research Center
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I have been trying to get a handle on writing asmbly
code to for the hp48 and I have a few questions.

Q2
When I convert an object to asm using "->asc" I get the object
plus a checksum appended to the end. How do I calculate the checksum
To hand code my own objects (using "asc->")?


Q2
I have been using "MLDL 1.01" by Jan Brittenson to look at
machine language code in the hp rom. This is the most useful
program for learning asm, great work!

My problem is it does not have a simple way of getting the
starting address of a program in a variable. For Ml programs
the only way I can do this now use "asm->" and then hand 
dissemble the code. So the question: Does anyone have a 
program That returns the address of the  start of a stored
program ?
 ie.
 1: label ->addr   1: #213FF 
Would the address change to quickly to be useful?
This would also help me check my code after I write it.

I would be great to have a library that had 
		all of the MLDL code
		"asc->"  "->asc"
		"peek" @ some sort peek function
		"->addr" @as described above

Q3

The STAR (thanks again Jan Brittenson) assemblers
seem to produce raw ml.
Is their a progam which will put them into a
 "asc->" or a "hp/kermit file" format?
Optionally put a #02DCC (code object) in front of
it


			Thanks 
			John D. Hoford