Re: Is it at all possible?

From: smf <smf_at_null.net>
Date: Sun, 19 Feb 2017 19:43:24 +0000
Message-ID: <04c5c7e4-5ef9-2bb3-df42-301d911a26ca@null.net>
On 19/02/2017 13:12, silverdr@wfmh.org.pl wrote:
> Could you elaborate/describe the difference? It's been some time since I tried those (and it was not in the '466 either) but I didn't notice anything striking. The R1 with its luma levels makes a noticeable difference but the later ones?

http://www.breadbox64.com/blog/the-lumafix64-mod/

"On the positive side, images produced by the MOS 6569R5 graphics chip 
left the rest of the test chips in the dust! This chip showed far less 
vertical stripes, less smearing and checkered patterns. "

Also the DRAM timing was fixed for the C128 and then the R5 VIC2 came 
out after that, earlier revisions required production to add random 
capacitors until it appeared to work good enough (until it got warm).

https://youtu.be/cwr8tTFGZtI?t=1526

I can't find the video when Bil Herd said that everyone at commodore was 
stealing the VIC2 out of his prototype (which may have been the 
prototype C16 or C128 which both used a VIC2 tower) & he left a tube of 
them on his desk. I have a vague feeling these were R5's.


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Received on 2017-02-19 20:03:09

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