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- Newsgroups: comp.os.os2.misc
- Path: sparky!uunet!spool.mu.edu!sdd.hp.com!swrinde!ringer!mlevis
- From: mlevis@ringer.cs.utsa.edu (Mike Levis) (OS/2)
- Subject: Re: VIDEO_MODE_RESTRICTION slows down DOS box
- Message-ID: <1992Dec17.214548.4202@ringer.cs.utsa.edu>
- Keywords: VIDEO_MODE_RESTRICTION
- Organization: University of Texas at San Antonio
- References: <1992Dec17.013514.2772@leland.Stanford.EDU> <1992Dec17.145356.27712@bmerh85.bnr.ca>
- Date: Thu, 17 Dec 1992 21:45:48 GMT
- Lines: 37
-
- In article <1992Dec17.145356.27712@bmerh85.bnr.ca> mlord@bmers63.bnr.ca (Mark Lord) writes:
- >In article <1992Dec17.013514.2772@leland.Stanford.EDU> wkn@leland.Stanford.EDU (Ken Neighbors) writes:
- >>I thought I'd set VIDEO_MODE_RESTRICTION to CGA so that I could get
- >>96K more of memory for one of my text only DOS apps. It now runs
- >>twice as slow (or half as fast :)
- >>
- >>Here's some data:
- >>restriction mem time to run
- >>NONE 655360 16 seconds
- >>CGA 753664 33 seconds
- >>MONO 720896 33 seconds
-
- Hmmm... on my machine the speed is the same regardless of the mode
- restriction. Do you have some sort of benchmark program that we all
- can try out? What resolution is your PM driver? (I'm using the 800x600x16
- generic driver)
-
- >Congratulations. At least you can use this setting (winos231 beta pack).
- >
- >With the stock OS/2 2.0 + SPP, this option has no effect at all on
- >the memory available to DOS. It does work if the SPP has *not* been installed.
-
- I have GA + SP installed, and it works on my machine.
-
- Restriction Bytes total Bytes free
- NONE 655360 613904
- CGA 753664 711952
- MONO 720896 679184
- (with DOS_HIGH ON I was able to get 736160 bytes free with CGA restriction)
-
- Be sure you have DOS_RMSIZE set to 640.
-
- --
- ==== Mike Levis mlevis@ringer.cs.utsa.edu ====
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