Article View: alt.games.descent
Article #1816Re: CTPCI and speeding up video
From: ma... Mr A Green
Date: Wed, 07 Jun 1995 00:00
Date: Wed, 07 Jun 1995 00:00
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3191 bytes
In article <3r358n$b...@malakor.kku.ac.th>, Kitt Tientanopajai <ki...@gear.kku.ac.th.> writes: >> Someone on alt.games.descent mentioned a pgm called CTPCI, which >> allows you to control several PCI/Neptune/Mercury chipset parameters, >> from a DOS command line. It helped me boost my memory subsystem >> performance a bit, but mainly it helped improve my DOS/Windows >> video performance a great deal. By turning off CPU to PCI Bursting, >> using CTPCI's -B option, I was able to get the ATI Gfx Pro Turbo card to >> run MUCH faster in any video mode that uses the "old style" SVGA/VGA modes, >> which run out of the < 1M address space (all DOS games currently out there >> use the older "banked" modes, and the VGA 320x200 etc modes all >> run out of this space). >> >> The strange thing is, that apps which use the card in native mode, >> using the linear aperature modes in the PCI address space (real high up >> there, like at the 4016MB range I think), turning off PCI BURST makes >> things much slower. The OS/2 video driver for the ATI Mach 64 uses >> the card in it "native" mode, so the -B option slows things up >> for OS/2. When using the VESA 2.0 test pgm VBETest, the linear >> aperature VESA 2.0 modes slow down by more than 50% when you >> turn off CPU to PCI Bursting. So theoretically games that >> come out using the advanced VESA 2.0 linear gfx modes, will >> be a lot faster if you use the +B (turn on CPU to PCI BURST) >> with the ATI Mach 64 card. For now under DOS/WIN -B is best. >> >> Windows 3.11 and the ATI Mach 64 drivers actually SPEED UP by quite >> a bit when you turn off CPU to PCI BURST..so it looks like the Windows >> 3.11 stuff DOES NOT use the ATI card in its fastest (linear aperature) >> mode...seems like it should. >> >> Oh well, for now I am happy, my DOS video games are A LOT faster, >> Windows is a bit faster, 3DBench went from 71 fps to over 88 fps.. >> and I can still keep PCI BURST on for OS/2 so it does not lose anything. >> >> Cards like the Hercules w32p's, the Hercules ARK2000's and the s3 864/964 >> based cards seem to work fine in all modes when the BURST is on..it is >> only the ATI card that seems to love BURST for the linear aperature >> modes, and hate it for "normal/oldstyle" modes. >> >> -Roger >> -------------------------------------------------------------- >> NET: uz...@crash.cts.com >> *WINDOWS from the folks who brought you EDLIN > >Umm...How can I find it ?...Where can I FTP it ? I want it too. Can somebody post it here??? or at least give the ftp site its lying at. Oh, also, EDLIN wasn't wriiten by microsoft, but someother company. so there. :) Adam
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From: ma...@csv.warwick.ac.uk (Mr A Green) Subject: Re: CTPCI and speeding up video Date: 1995/06/07 Message-ID: <3r44u7$q4@lily.csv.warwick.ac.uk> X-Deja-AN: 103902280 references: <D9KMp0.G2J@crash.cts.com> <3r358n$bk@malakor.kku.ac.th> organization: University of Warwick, Coventry, UK mime-version: 1.0 newsgroups: comp.os.os2.advocacy,alt.games.descent,comp.sys.ibm.pc.games.action,comp.benchmarks Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit