Re: framebuffer refresh

On Mon, 15 Aug 2011 15:26:59 -0700
Ian King <[email protected]> wrote:

> One of the big challenges can be whether a given monitor supports
> sync-on-green.  I Googled and once found a list of LCDs that had been
> tested and found to support SOG.  Both my Sun and SGI systems require
> this, which is why I did the digging
Yes. SoG is an issue. But not with Suns. Sun framebuffers usually use
C-Sync and most SGIs supply H/V-Sync in addition to SoG.

And if a monitor (CRT or LCD) promises to support SoG in its tech
specs, the reality is different. I came across CRTs and LCDs that
promised SoG and in practice it didn't work right. E.g. SoG was only
recognized when the displayed picture was relatively bright. With white
text on a black background it didn't work. Fortunately it is quite
simple to extract C-Sync from SoG. I did this with a simple comparator.

And please boys: Obey the Netiquette, no top postings above full quotes!
(See RFC1855, section 3.1.1)
-- 


\end{Jochen}

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