[Coco] Need some tips debugging 6309 for OVCC

[Walter Zambotti]

Curtis

It manages to boot completely and setup 3 other windows.  It even creates the vterm window successfully.  The only thing causing the crash is the merge command that is loading the fonts.

I would assume this would cause the graphics driver to kick into gear.  So if I avoid any graphics I seem to be ok.

I've even run basic09 (6309) and tried some simple division and multiplication math. Seems ok!

I have now looked at MAME 6309 code and it is basically an abstraction layer to a general purpose device emulator within MAME. There is no chance of extracting the 6309 cpu component and running it independently of MAME.

So I will not be able to compare the MAME 6309 cpu to the VCC or OVCC 6309 cpu.

I now have to identify the culprit instructions!

Walter

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of L. Curtis Boyle
Sent: Tuesday, 3 December 2019 10:07 AM
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Subject: Re: [Coco] Need some tips debugging 6309 for OVCC

Is it certain apps, or certain parts of the boot that are causing the issue?

L. Curtis Boyle
curtisboyle at sasktel.net



> On Dec 2, 2019, at 8:04 PM, Walter Zambotti <zambotti at iinet.net.au> wrote:
> 
> Hi all
> 
> 
> 
> Trying to get NitrOS9 EOU working in 6309 mode on OVCC and running 
> into some debugging woes.
> 
> 
> 
> It boots and starts up to the point where it performs the font merge 
> in the startup script.
> 
> 
> 
> I have that commented out at the moment and I can use EOU 6309 in 
> terminal mode without issue.
> 
> 
> 
> I have set break points for all 6309 instructions but this hasn't help 
> as the ones that are invoked are done so many times and appear to be 
> executing correctly.
> 
> 
> 
> Not sure how to proceed any further.
> 
> 
> 
> I could download the MESA source for the 6309 and run it against my 
> code via a CPU verifier I wrote.  Would be time consuming!
> 
> 
> 
> Any other ideas guys/girls?
> 
> 
> 
> Walter
> 
> 
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