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Message from discussion Dual VIC-II's
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winston19842005@yahoo.com  
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 More options Apr 22 2012, 9:38 pm
Newsgroups: comp.sys.cbm
From: "winston19842...@yahoo.com" <winston19842...@yahoo.com>
Date: Sun, 22 Apr 2012 18:38:13 -0700 (PDT)
Local: Sun, Apr 22 2012 9:38 pm
Subject: Re: Dual VIC-II's

On Saturday, April 21, 2012 6:30:49 PM UTC-4, cts3000 wrote:
> Would Dual VIC-II's be of any use in a Commodore 64? Could screen
> resolution be doubled?

The TMS9918A had a SYNC line, and a "transparent" color that allowed you to cascade chips (or external sources) and the external video showed through the transparent areas.

But it would require its own RAM. And from all I've ever read, SYNCing didn't work very well, leading to washed-out colors or artifacts or other such issues.

So, it looked good on paper...


 
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