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Old 10 May 2012, 13:45   #996
Join Date: Jun 2010
Location: out in the wild
Posts: 1,127
Originally Posted by Jack Burton View Post
So I plugged my A1200 to my 19" VGA LCD screen to use it with 31KHz modes (dbl PAL) and vertical lines appeared too. I planed to buy an Indivision MKII, but that vertical lines are annoying, so I'm a bit confused right now, and I'm looking for a 1084...
Your observation confirms what I wrote earlier in this thread: The vertical lines are caused by a difference between the pixelclock used by Indivision AGA MK2 and the pixelclock that the flatscreen is using. This shifts the sample-spot in relation to the actual pixel, giving the effect that you're seeing.

You will be able to completely eliminate the vertical lines with the forthcoming config tool, as that will let you configure the output mode to a Vesa standard. The sampled pixels of the flatscreen will then be "on the spot" where Indivision AGA MK2 produces them, and you'll have a crystal clear picture. That same crystal-clear picture is already possible if you're using the DVI connection - a purely digital connection does not require any sampling and thus doesn't have the artefacts that come with sampling.

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