Re: An LCD for your IIGS?

[salfter@salfter.dyndns.org (Scott Alfter)]

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In article <20030918134224.22854.00000828@mb-m23.aol.com>,
Michael J. Mahon <mjmahon@aol.com> wrote:
>Scott Alfter wrote:
>>I saw one of these at Costco this evening:
>>
>>http://www.sampoamericas.com/001/productitemspec.php?id=33
>
>I have a Samsung 170MP, which has similar characteristics, but I have
>never tried it with the IIgs (don't have one set up at the moment).

The manual for that model says the minimum horizontal scan frequency is 30
kHz...too high.  (Why they don't allow a lower frequency on the VGA input is
anybody's guess...it has to deal with lower frequencies somehow in order to
display TV-tuner, S-video, and composite inputs.)

>It would be interesting to see how the IIgs video works with the LCD,
>because the IIgs video has discrete pixels, and so does the LCD. Any
>resampling irregularities (because of asynchronous clocks) would
>cause vertical lines to "wiggle" around by an LCD's pixel's width.
>
>Depending on how the resampling is done, this could range from
>barely visible to really annoying.

Old notebooks (usually with 800x600 displays) tended to look nasty when
640x480 was scaled up...they usually just duplicated selected rows/columns.
The newer displays I've used (like the 15" LCD on one of my work machines or
the 14" on my notebook...both are 1024x768) don't look too bad at 640x480
or 800x600...things get a bit "soft" around the edges, but the desktop panel
has no problem auto-syncing at 640x480 60Hz, 720x480 60Hz, or 800x600 60Hz.
(Auto-syncing didn't work so well at 852x480, but you could adjust it
manually to get an OK picture from it.)

An added bonus would be that the scanlines you see on a tube monitor should
go away.

(Hmm...it sounds like you'd want to have the monitor auto-adjust while
booted into GS/OS, as it ought to be able to lock onto 640x200 video as if
it were 640x480 interlaced video.  You'd end up with black bars at the top
and bottom, as there are 80 extra (interlaced) scanlines that the IIGS
doesn't generate.  Once that's set up, it should interpolate from the lower
resolutions in the same way...while the resolution falls to 560x192 or
280x192, the scan rates stay the same.)

  _/_   Scott Alfter
 / v \  salfter@salfter.dyndns.org
(IIGS(  http://alfter.us            Top-posting!
 \_^_/  pkill -9 /bin/laden         >What is the most annoying thing on Usenet?

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