Article View: comp.sys.ibm.pc
Article #43337Re: Replacing an 80386 with an 80486
From: Alex E. Wielhouwer
Date: Fri, 02 Mar 1990 15:09
Date: Fri, 02 Mar 1990 15:09
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In article <9673@portia.Stanford.EDU> dhinds@portia.Stanford.EDU (David Hinds) writes: > First, it sounds like it would be reasonable to expect a 486 >stuck in a 386 board to run about 2X as fast as the 386 at the same >clock speed and with the same support hardware, due to improved pipelining >and the internal cache. Second, the 486 floating point unit is supposed >to be like an order of magnitude faster than a 387. If adapting a 486 ----- Please correct me if I'm wrong, but in a multi-tasking environment, the floating point registers and stack need to be handled seperately on a '386/'387 system during task swaps, or, in some cases the '387 is ignored. (OS/2?). With a '486 environment, this should be much more efficient, i.e., faster. ============================================================================= Alex E. Wielhouwer, P.Eng., (519)885-1211 x3422 Department of Computing Services, University of Waterloo, 200 University Avenue W, Waterloo, Ontario, Canada. N2L 3G1 =============================================================================
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!clyde.concordia.ca!jarvis.csri.toronto.edu!utgpu!watserv1!alexew From: alexew@watserv1.waterloo.edu (Alex E. Wielhouwer) Newsgroups: comp.sys.ibm.pc Subject: Re: Replacing an 80386 with an 80486 Message-ID: <1304@watserv1.waterloo.edu> Date: 2 Mar 90 15:09:55 GMT References: <29108@amdcad.AMD.COM> <1640057@hpspcoi.HP.COM> <9830@sequoia.UUCP> <9673@portia.Stanford.EDU> Reply-To: alexew@watserv1.waterloo.edu (Alex E. Wielhouwer) Organization: U. of Waterloo, Ontario Lines: 20