Re: PET 2001 fix Part 3 - RAM/ROM board etc.

From: Philip Lord <random6000_at_mac.com>
Date: Wed, 18 May 2011 19:05:22 +0900
Message-id: <1E23A822-ACAB-4794-A994-AE19104F5354@mac.com>
Just another quick update for the list:

Ruud, poking and peeking the screen address as you mentioned seems to have normal results.

I fixed the issue with BASIC4 not loading. It turned out to be a funky Flash ROM. I dumped it's contents and could see some problems with the BASIC 4 part. I ended up patching/fixing the original dump and just buying another flash ROM and programing it...it seems to work fine now.

I'm also able to load programs (Android Nim) from C2N datasette, so I know that part now works.

Also built a keyboard cable adaptor for the PET 2001N/3000 keyboard that Anders sent.

Now I think I've only got the weird screen repeat thing to address now and I'm done....I hope

You can see all the pictures on my site as usual.
http://web.me.com/lord_philip/other_computers/20012.html

Thanks again

Phil



On May 17, 2011, at 6:16 AM, Philip Lord wrote:

> I've posted another video showing some simple typing tests:
> 
> - typing in 1 thu 9, and repeating
> - followed by repeated returns
> - a CLR command
> - followed by more 1 thu 9 repeated.
> 
> At one point, as the cursor nears the right side, 3 flashing cursors appear!!!
> 
> Phil
> 
> 
> On May 17, 2011, at 1:00 AM, Rhialto wrote:
> 
>> On Mon 16 May 2011 at 13:06:32 +0200, Baltissen, GJPAA (Ruud) wrote:
>>>> I'll hook up a keyboard and reinstall the 6520's to see what happens 
>>>> when I actually start typing something.
>>> 
>>> In that case you can forget the ASM and use Basic to poke and peek those
>>> addresses I mentioned. Should do the same trick.
>> 
>> Or, once you can do some actual typing, just type 40 characters on a
>> line and keep track of whether they appear twice. Especially when you
>> get close to the right side of the screen, it may be that what you're
>> typing starts showing up copied on the next line too.
>> 
>> First I had the impression that maybe more or fewer than 40 characters
>> might be present on a line (that would account for some shifting too).
>> But I counted one of the pictures and that seems ok (making it even more
>> mysterious what happens...)
>> 
>> -Olaf.
>> -- 
>> ___ Olaf 'Rhialto' Seibert  -- There's no point being grown-up if you 
>> \X/ rhialto/at/xs4all.nl    -- can't be childish sometimes. -The 4th Doctor
>> 
>>      Message was sent through the cbm-hackers mailing list
> 
> 
>       Message was sent through the cbm-hackers mailing list


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Received on 2011-05-18 11:00:12

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