Re: 6809 / 6702 puzzle

From: Rhialto <>
Date: Fri, 10 Feb 2012 12:03:37 +0100
Message-ID: <>
Hi Mike,

On Thu 09 Feb 2012 at 17:07:32 -0800, Mike Naberezny wrote:
> Here's the ISPUG disassembly of the Waterloo ROM:
> Also on that page you'll find VICE monitor labels to help with debugging.

Ah that is nice stuff you're coming up with!
It seems that while I slept, the emulation has been fixed.
I think that since the version you mentioned that still worked, I've
added some assembler support in the VICE monitor (enter with Alt-H or
from the menu). It isn't finished yet because there is a yacc grammar
that tries to parse opcode operands for all 3 kinds of processor, and
that can't be stretched that far. "D,X" can be 4 different addressing
modes for the 6809 alone, and the grammar can't decide which one it is
without knowing the instruction (which it currently does not know at
that point). So that must be restructured first. But the modes other
than reg post, usr post and sys post should work.

> Mike
___ Olaf 'Rhialto' Seibert  -- There's no point being grown-up if you 
\X/ rhialto/at/    -- can't be childish sometimes. -The 4th Doctor

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Received on 2012-02-10 12:00:04

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