[comp.windows.ms] Video 7 VGA Pure Mode Switching

cchapman@msd.gatech.edu (Chuck H. Chapman) (12/04/90)

I'm using a Video 7 VRAM VGA with 512k of RAM.  When I run non-windows
programs, the PURE mode is turned on, which disables any extensions
beyond normal VGA capability.  This prevents programs like WordPerfect
from taking advantage of some the higher resolution modes of the
VRAM VGA (like displaying 132 columns).  I resorted to using a batch
file to start DOS applications that require high resolution modes.
This isn't a very good solution because when you switch to another
task and come back to the DOS high resolution task, Windows does not
restore the proper video mode.

Has anyone else noticed this problem and come up with a better solution?

BTW, I'm using the Windows 3 720x512 256 color driver that came with
the VRAM VGA.

Chuck

--
Chuck H. Chapman  (GTRI/STL/MSD)             (404) 528-7168
Georgia Institute of Technology, Atlanta Georgia, 30332
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jls@hsv3.UUCP (James Seidman) (12/05/90)

In article <cchapman.660317460@romeo> cchapman@msd.gatech.edu (Chuck H. Chapman) writes:
>I'm using a Video 7 VRAM VGA with 512k of RAM.  When I run non-windows
>programs, the PURE mode is turned on, which disables any extensions
>beyond normal VGA capability.

>Has anyone else noticed this problem and come up with a better solution?

"It's not a bug, it's a feature."

First, let me make the disclaimer that it wasn't my decision, so don't
blame me. :)  But there is a valid reason for this.  You're put into
pure mode because you can run into some real problems trying to switch
between extended modes and the Windows screen.  I know, you're saying
that you've been going along just fine using WordPerfect and never had
a problem.  Well, some configurations *do* cause problems, and the
marketing people wanted to play it safe.

I understand (but can't be sure, as I don't do Windows stuff anymore)
that the company is working on a new Virtual Display Driver which will
handle extended modes properly.  When/If this is completed it shouldn't
set pure mode.  (But *please* don't everyone start calling tech support
and asking about it... they'll kill me! :)

-- 
Jim Seidman (Drax), the accidental engineer.
"There's a certain freedom to being completely screwed." - The Freshman
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cms2839@isc.rit.edu (C.M. Stuntz ) (12/06/90)

In article <6118@hsv3.UUCP> jls@hsv3.UUCP (James Seidman) writes:
>In article <cchapman.660317460@romeo> cchapman@msd.gatech.edu (Chuck H. Chapman) writes:
>>I'm using a Video 7 VRAM VGA with 512k of RAM.  When I run non-windows
>>programs, the PURE mode is turned on, which disables any extensions
>>beyond normal VGA capability.
>
>"It's not a bug, it's a feature."

>[ bunch of other stuff basically saying that Video-7 turns on
>pure mode when shelling out to dos to avoid program conflicts ]

				then i'm curious why this has never
happened to me . i have a V-RAM card with 512KB, and i've never has a
problem with using extended modes when going out to DOS .


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