Article View: comp.sys.ibm.pc.misc
Article #3658Re: Loosing characters when using 80286 protected mode
From: Kevin D. Quitt
Date: Tue, 02 Oct 1990 15:50
Date: Tue, 02 Oct 1990 15:50
18 lines
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1255 bytes
The problem with switching in and out of protected mode on a 286, is
that it can't switch out of protected mode. Intel cleverly left off any
reasonable way to do that. So most people who play the switching game
have to get something to reset the processor (after cleverly saving all
the pertinent info needed for a hot boot - and most of these schemes use
the keyboard to reset the processor.
Since the reset process also takes at least 2 milliseconds, high-
speed serial communications will also be lost.
--
_
Kevin D. Quitt demott!kdq kdq@demott.com
DeMott Electronics Co. 14707 Keswick St. Van Nuys, CA 91405-1266
VOICE (818) 988-4975 FAX (818) 997-1190 MODEM (818) 997-4496 PEP last
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!srhqla!demott!kdq From: kdq@demott.COM (Kevin D. Quitt) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: Loosing characters when using 80286 protected mode Message-ID: <630@demott.COM> Date: 2 Oct 90 15:50:36 GMT References: <14950006@hpdmd48.boi.hp.com> Reply-To: kdq@demott.COM (Kevin D. Quitt) Organization: DeMott Electronics Co., Van Nuys CA Lines: 18