[comp.sys.ibm.pc] VGA problem

mcmillan@uranus.cis.ohio-state.edu (Harold McMillan) (11/28/89)

I have just installed an ATI VGA Wonder (256K) in my PC.  I have 
been using Quick C 2.0 with the '/h' option to display 43 lines with 
my old EGA card.  Now (with the VGA card) when I use the '/h'
option, I see what appears to be the first 24 or 25 lines of what 
should be a 43 (or is it 50 with VGA?) line display but the 
bottom half of my display is completely black.  I am using an
NEC Multisync II.  Quick C documentation does say that the '/h' 
option works with VGA.

Other applications seem to be working fine.
Anyone have any ideas on what is going wrong here?
-=-
Hal McMillan                   |  "Government is the institutionalization
mcmillan@cis.ohio-state.edu    |   of the desire to live off others"
CompuServe 72627,642           |   -- Someone

pipkins@qmsseq.imagen.com (Jeff Pipkins) (11/30/89)

In article <74412@tut.cis.ohio-state.edu> Harold McMillan <mcmillan@cis.ohio-state.edu> writes:
>I have just installed an ATI VGA Wonder (256K) in my PC.  I have 
>been using Quick C 2.0 with the '/h' option to display 43 lines with 
>my old EGA card.  Now (with the VGA card) when I use the '/h'
>option, I see what appears to be the first 24 or 25 lines of what 
>should be a 43 (or is it 50 with VGA?) line display but the 
>bottom half of my display is completely black...

Use the vconfig program that came with your card to set it to EGA mode.
Works for me with other programs that otherwise have the same symptom,
(like codeview) but I don't use Quick C.

OTHER PROBLEMS:
I love the 132x44 line mode (I have a Nec MultiSync 3D), but the ANSI.SYS
file that comes with MS-DOS 4.01 doesn't seem to like it.  Any ideas?

ALSO:
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.
NEC and Gateway said that the problem is with my monitor; Gateway sent
a new one and it does the same.  A friend with identical setup gets
identical results.  ANY IDEAS, PLEASE?!

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akcs.larry@nstar.UUCP (Larry Snyder) (12/01/89)

I'm having problems with my ATI VGA Wonder board.  I was using a mono
monitor and when replacing the monitor with a fixed frequency Mitsubishi
1429C VGA monitor the sync is off.  I thought the card could detect the

poffen@chomolungma (Russ Poffenberger) (12/04/89)

In article <49@qmsseq.imagen.com> pipkins@qmsseq.UUCP (Jeff Pipkins) writes:
>In article <74412@tut.cis.ohio-state.edu> Harold McMillan <mcmillan@cis.ohio-state.edu> writes:
>
>ALSO:
>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.
>NEC and Gateway said that the problem is with my monitor; Gateway sent
>a new one and it does the same.  A friend with identical setup gets
>identical results.  ANY IDEAS, PLEASE?!
>

I don't know about the ATI card, but the V7 Fastwrite card has a mechanism
whereby you can load a parameter table (they have settings for different
monitors) that will automatically correct this. It IS a function of the monitor

As they change frequencies to match the mode, they shift position on the screen

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kens@hplsla.HP.COM (Ken Snyder) (12/04/89)

> 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

akcs.larry@nstar.UUCP (Larry Snyder) (12/06/89)

>  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.

What type of video board do you have?  I currently have an ATI VGA Wonder
with 256K and the board doesn't want to work with a fixed frequency (31.5
khz) VGA monitor or an Ultra 14 multisync in the 640x350 16 color mode.  I
called ATI and they are aware of a problem with the board in the filtering
that is pulling the board out of sync and issued me an RA number to return
the board.  The reason I asked you originally is that I am replacing my
Mitsubishi 1429C with a NEC 3D - using the ATI board (upgraded to 512K) and
hopefully will be running X-Windows.

larry@nstar

andyross@ddsw1.MCS.COM (Andrew Rossmann) (12/06/89)

>  Resp: 2 of 2 by kens at hplsla.HP.COM
>Author: [Ken Snyder]
>  Date: Tue Dec 05 1989 16:40 CST

>> 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

  My NEC 3D also HAD problems with 132 column mode. I have a Paradise VGA+
card, and have found out that the monitor works MUCH better if you leave
the card set to the FIXED FREQUENCY setting!! The multisync mode of many
cards is geared more toward the original Multisync and similar monitors. On
the Paradise card, setting fixed frequency will NOT affect the 800x600
mode. The only 'problem' is that in the fixed frequency mode, you must load
in a different font (skinnier) than in multi-sync mode. The VGAPLUS program
that came with the card does this automatically. I can send a program that
loads the proper fonts (in fact, the 43 line font had been modified
to look a bit better) from the DOS prompt. I originally wrote it so that
Borland's SPRINT word processor could work in the 132 column modes (works
great!)
  In the multisync mode, the 132 column modes on my 3D were so far to the
right that I was unable to adjust it enough left to get the whole thing on
screen. In fixed-sync mode, all modes center perfectly. The 3D is
pre-programmed for VGA frequencies. ALso, keep your 3D's MODE switch to
OFF.

  Andrew Rossmann
  andyross@ddsw1.MCS.COM

karl@ddsw1.MCS.COM (Karl Denninger) (12/06/89)

We recently sold a 3D with a system and an ATI Wonder 512, and didn't notice
any problem with the screen being offcenter and the like.......

akcs.larry@nstar.UUCP (Larry Snyder) (12/06/89)

>We recently sold a 3D with a system and an ATI Wonder 512, and didn't notice
>any problem with the screen being offcenter and the like.......

I called ATI and there is a board design flaw that disables the board from
working in the 31.5 khz mode with some monitors (the ones that I had
qualified - and Ultra-14 and Mitsubishi 1429C).  The problem according to
ATI was that the board has internal filtering to pass FCC, and
likewise the monitors included filtering - thus providing too
much filtering and keeping the monitor from getting in sync with the ATI.  I
was issued an RA number, and ATI mentioned that they changed all boards in
stock and production runs to fix this problem.

karl@ddsw1.MCS.COM (Karl Denninger) (12/07/89)

>-----
>Response 5 of 5 (7178) by akcs.larry at nstar.UUCP on Wed 06 Dec 89 01:24
>[Larry Snyder]
>(18 lines)
>
>What type of video board do you have?  I currently have an ATI VGA Wonder
>with 256K and the board doesn't want to work with a fixed frequency (31.5
>khz) VGA monitor or an Ultra 14 multisync in the 640x350 16 color mode.  I
>called ATI and they are aware of a problem with the board in the filtering
>that is pulling the board out of sync and issued me an RA number to return
>the board.  The reason I asked you originally is that I am replacing my

Which revision of the board do you have?

--
Karl Denninger (karl@ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
Public Access Data Line: [+1 708 566-8911], Voice: [+1 708 566-8910]
Macro Computer Solutions, Inc.  "Quality Solutions at a Fair Price"

coy@ssc-vax.UUCP (Stephen B Coy) (12/10/89)

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.