Re: Color PET prototype photo

From: Nate Lawson <>
Date: Thu, 13 Jun 2013 14:19:33 -0700
Message-Id: <>
On Jun 13, 2013, at 10:28 AM, Gerrit Heitsch wrote:

> On 06/13/2013 06:13 PM, Steve Gray wrote:
>> Hi, yes it was 1980. Sorry, I just pasted in the quote from Michael and
>> removed some stuff about his appearance. The 1980 reference was from a
>> different quote. Anyway, I added the date in brackets so hopefully that
>> will be clear.
>> As an aside, I've been re-reading Brian Bagnall's "On the Edge" books (I
>> have both editions) and the jumping around makes things a little
>> confusing. It certainly was one of the most interesting turning points
>> in Commodore's history. Fascinating reading for anyone remotely
>> interested in Commodore nostalgia.
> Speaking of the TOI prototype... Has anyone ever used a 6562? If yes, how did it work? Did it use the badline trick already or how did they manage to get 40col in color? The VIC needs badlines to do it.
> Since photos of the chip exist, I assume that some of them were made.

Reading between the lines from On The Edge, they definitely existed but had phase synchronization issues as they heated up. They also required high-speed RAM, which leads me to believe that they did not use the badline trick. Thus, the RAM had to be 2X main CPU clock rate to accommodate the video accesses.

It would be interesting if one of the earlier C= crew (Peddle via Bil Herd?) could verify this.


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Received on 2013-06-13 22:00:08

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