[Coco] 6809 disassembler

[William Astle]

> Portal-9 will probably use 3 windows to run a disassemble session.  The
> binary, the data/label file, and the generated listing.  So far, the
> listing has a troublesome left column of addresses and opcodes that doesn't
> appear assemblable without major editing.  I wonder what's up with
> this?  The whole point of disassembling is so you can make a real source
> code file, not a listing.

A number of years ago I wrote a disassembler in BASIC that included the
address and code as well. This was intentional because that's what I
needed at the time I wrote it. It was published in CFDM so if anyone has a
copy that they can upload somewhere, go ahead. It should handle the
documented 6809 opcodes correctly. (I used the Levanthal book to make sure
I decoded everything right.)

Obviously it isn't overly useful for Portal9 but it might prove
interesting from a "how do I do it" perspective.

As a side note, I was already impressed by the 6809 instruction set.
However, as I wrote the disassembler, I became even more impressed. It was
actually quite straight forward to decode it.

-- 
William Astle
finger lost at l-w.net for further information

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