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Article #42762Re: 386 with 640-1024 non-mappable
From: Brian L Kaisner
Date: Tue, 20 Feb 1990 02:59
Date: Tue, 20 Feb 1990 02:59
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>I am looking at a 386-25Mhz motherboard with an AMI bios. >The Documentation states that the area from 640K to 1Meg can ONLY be >used for shadowing the bios, video etc., and is unusable otherwise. > >Has anybody ever heard of this? Will this present a problem when >attempting to load TSRs HI (with qemm.sys and DesqView). Will OS/2 >be a problem? The information here is rather sketchy, but I don't think you'll have any problems as long as the RAM _is_ there and accessible. That fact that shadowing is supported suggests that it is. OS/2 doesn't use the BIOS or chipset memory mapping functions. QEMM 5.0 can generally use convert any part of the memory map that isn't being used by something else (video BIOS, etc) into useable high memory. In fact, it figures out which portions of the BIOS ROM are blank/unused and maps those to RAM. >David Boyer >boyer@iuvax.cs.indiana.edu - Brian kize@cup.portal.com
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!seismo!sundc!newstop!sun!imagen!atari!portal!portal!cup.portal.com!kizeReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!seismo!sundc!newstop!sun!imagen!atari!portal!portal!cup.portal.com!kize From: kize@cup.portal.com (Brian L Kaisner) Newsgroups: comp.sys.ibm.pc Subject: Re: 386 with 640-1024 non-mappable Message-ID: <27130@cup.portal.com> Date: 20 Feb 90 02:59:04 GMT References: <36064@iuvax.cs.indiana.edu> Distribution: usa Organization: The Portal System (TM) Lines: 23