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Article #14341Re: EMM386.EXE slows down Hyperdisk
From: Ted B. Drude
Date: Wed, 26 Jun 1991 14:25
Date: Wed, 26 Jun 1991 14:25
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In article <4481@bruce.cs.monash.OZ.AU> maurice@sol6.cs.monash.edu.au (Maurice David Castro) writes: >From article <25639@well.sf.ca.us>, by al@well.sf.ca.us (Alfred Fontes): [...] ]>> Unfortunately, EMM386.EXE seems to slow Hyperdisk down, on the >> order of 50%. Has anybody else had this problem? What can I do about it? [...] >> Apart from being the standard for LIM there seems to be no advantage >> in using EMM386. >Maurice Castro [...] My own testing of EMM386.SYS vs. Quarterdeck's QEMM386.SYS shows that the Microsoft driver is considerably slower under DOS 3.x and 4.x. The generic OEM 386 LIM drivers provided with most new systems are similarly faster. I haven't studied the source code, but it seems that Microsoft almost deliberately slowed down their EMM386 driver, or they simply didn't know how to program the '386's memory paging architecture very well. -Ted Drude (drudetb@ingr)
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!uunet!infonode!drudetb From: drudetb@infonode.ingr.com (Ted B. Drude) Newsgroups: comp.sys.ibm.pc Subject: Re: EMM386.EXE slows down Hyperdisk Message-ID: <1991Jun26.142545.8917@infonode.ingr.com> Date: 26 Jun 91 14:25:45 GMT References: <25639@well.sf.ca.us> <4481@bruce.cs.monash.OZ.AU> Distribution: comp Organization: Intergraph Corp. Huntsville, AL Lines: 18