Article View: comp.os.ms-windows.programmer.misc
Article #1850Re: Herc cards and 486's and Windows !
From: cantua
Date: Thu, 24 Dec 1992 12:56
Date: Thu, 24 Dec 1992 12:56
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2425 bytes
From article <725148498snz@chrism.demon.co.uk>, by chris@chrism.demon.co.uk (Chris Marriott): > In article <Bzp9Av.4FF@cantua.canterbury.ac.nz> cameron@cosc.canterbury.ac.nz writes: > >> >>Do you have a dual display working on a 486 under >>windows ? >> >> ...... >> >>I've got DualDisplay=1 in my system.ini..and the herc card >>is a recent model. The machine isn't slowed down in normal >>DOS mode.. >> >>SO what do I need to do to get the second display working >>on the 486 ? I've been through all available windows and >>Turbo C docs.. but the only setting I could find was >>the "dualdisplay=1" - make no difference.. >> >>The vga card is a ET4000 is 1Mg RAM.. Machine is 33Mz TP >>486 >> >> .... > > The reason for this slowdown is simple. If you have an 8-bit secondary > video card in your machine - which ALL mono card are - then the primary > colour video card is *also* forced into 8-bit mode. As you've discovered, > 8-bit access to a video card makes Windows s-l-o-w. > > There's absolutely no way around this - it's just the way the AT bus > works, unfortunately. If you must have dual displays, the only thing you > could do (if you're rich!) is have an 8514/a card such as an ATI Ultra > as your primary display, and 16-bit VGA as secondary. > > Personally, I live with CodeView on a single monitor. Not too bad, once > you get used to it. > > Chris > -- Actually, I've found a temporary solution to my problem.. I found that by using the standard Super VGA drivers that come with windows ie: 800,600 16 Color, all the problems have disappeared !! Screen updates are back to the speed they should be and no problems with the disk controller. I was using the ET4000 800x600 256 color drivers before..( with no problems until I put the herc card in).. So I guess switching down to 16 color mode is a reasonable compromise. But is this what should happen ?? Cameron.
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arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!comp.vuw.ac.nz!canterbury.ac.nz!cosc.canterbury.ac.nz!cameronReferences:
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Newsgroups: comp.os.ms-windows.programmer.misc Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!comp.vuw.ac.nz!canterbury.ac.nz!cosc.canterbury.ac.nz!cameron From: cameron@cosc.canterbury.ac.nz (cantua) Subject: Re: Herc cards and 486's and Windows ! Message-ID: <BzrLAv.Bu6@cantua.canterbury.ac.nz> Nntp-Posting-Host: huia.canterbury.ac.nz Reply-To: cameron@cosc.canterbury.ac.nz References: <725148498snz@chrism.demon.co.uk> Date: Thu, 24 Dec 1992 12:56:54 GMT Lines: 53