Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uwm.edu!psuvax1!rutgers!mit-eddie!uw-beaver!fluke!ssc-vax!coy
From: coy@ssc-vax.UUCP (Stephen B Coy)
Newsgroups: comp.sys.ibm.pc
Subject: Re: VGA problem
Message-ID: <3043@ssc-vax.UUCP>
Date: 9 Dec 89 22:41:24 GMT
References: <74412@tut.cis.ohio-state.edu> <5190064@hplsla.HP.COM>
Organization: Boeing Aerospace & Electronics, Seattle WA
Lines: 42

In article <5190064@hplsla.HP.COM>, kens@hplsla.HP.COM (Ken Snyder) writes:
> > When I change into 132x44 mode, the screen alignment jumps about an inch
> > to the right.  If I adjust it properly, then the next mode change makes
> > it jump back an inch to the left, making it necessary to adjust again.
> 
>   My NEC 3D does the same thing.  It centers the image of each resolution
> in a different place.  I had a Mitsubishi Diamond Scan 14" monitor and it
> did a much better job of centering the image from mode to mode.  A matter
> of fact, I thought the NEC I had, had a problem but I heard from others
> who said that the 3D just just did a poor job of centering images.  What
> to do.  Like you, I like everything else about the monitor.
> 
> Ken

The NEC 3D actually remembers the settings for each mode which means
that if you don't like the default factory settings you must go
through each video mode and set them individually.  I've got a 3D
connected to an ATI VGA Wonder.  The graphics are great!  In playing
with it, I've noticed a few oddities.  Any comments?

1)  Switching in and out of 800x600 mode seems to be a little harder
for the 3D.  It takes a little longer to resync.

2)  Using MSC 5.1 to cycle the palette causes "snow" to appear on
the screen.  It appears that the ATI card allows the palette entries
to be updated during display, not just during the vertical retrace
time.  This would also explain why changing the palette on the ATI
card is much faster than on an Orchid ProDesigner.

3)  When I display an image in 800x600 mode with a light background
color I noticed extra lines near the top and bottom of the screen.
It seems like the beam is turned off a little too late and turned
back on a little too early during the vertical retrace.  Currently I
have no idea if this is a problem with the monitor, the card, or the
phase of the moon.

Stephen Coy
uw-beaver!ssc-vax!coy


800x600 mode seems to be a little harder for the 3D.  It takes just
a little longer to resync.