Re: pin driver difference between early/later VIC-II?

From: Peter Rittwage <peter_at_rittwage.com>
Date: Mon, 8 Mar 2021 16:51:49 -0600 (CST)
Message-ID: <1615243909135-0.post_at_n4.nabble.com>
This effect can be mostly eliminated by converting to Y/C video output. 

I find the 6567R56A and the original 326298 board video output looks really
good with a couple simple mods.

First, I put a 25-33ohm resistor between the left side of R9 and GND (left
side of R11) which gets you about the right signal levels on the Luma line,
as it's much too high normally on it's own. 

Next, lift the right side of R10 to convert the composite output to
Chroma-only. It does clear up the signal just a little (less color moire
interference on the edges in Y/C mode) than using the full composite signal
as your Chroma.

Connect the Luma and Chroma to the Y and C inputs on a compatible monitor
and it will look at least as good as the 250407 board.




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Received on 2021-03-09 00:00:44

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