From:	jb3207 AT eclipse DOT co DOT uk (Jason Barstow)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: VESA DoubleBuffer flicker and SetGetDisplayStart func 0x07h
Date:	Sun, 02 Mar 1997 10:43:23 GMT
Organization:	Jabber Interactive
Lines:	16
Message-ID:	<5fblr1$a0r@news.cableinet.net>
References:	<5f77ph$bf8 AT news DOT cableinet DOT net> <aI4FlBBCW2FzEw+5 AT talula DOT demon DOT co DOT uk>
Reply-To:	jb3207 AT eclipse DOT co DOT uk
NNTP-Posting-Host:	195.188.32.68
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk> wrote:

>Are you waiting for the retrace? (setting the 0x80 flag in %bl). If not,
>some cards will flicker because VESA will return instantly from the
>scroll function, while the display hardware doesn't actually update its
>status until the next retrace.

Yes I'm doing this, mmmm I'll just check my code ;)
Perhaps the VESA2.0 implementation for my card isn't 100%.
Maybe an explicit wait for VR instead of passing 0x80 will do the trick.

Thanks .
'later, Jason.

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