Re: XMS vs EMS (performance)

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#4747

From: Leonard Erickson
Date: Fri, 15 Feb 1991 20:48

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Do recall that every time you switch *from* protected mode, the CPU gets
reset. At the data rates you are talking about, that guarantees lost
interrupts. We had a 286 doing hispeed serial i/o with no handshaking.
It works fine as long as *nothing* uses extended RAM.

-- 
Leonard Erickson			leonard@qiclab.uucp
personal:	CIS: [70465,203]	70465.203@compuserve.com
business:	CIS: [76376,1107]	76376.1107@compuserve.com

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Message-ID: <1991Feb15.204811.6327@qiclab.scn.rain.com>

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References: <1991Jan30.134859.22160@linus.mitre.org>

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!wuarchive!mit-eddie!uw-beaver!milton!ogicse!pdxgate!parsely!percy!qiclab!leonard
From: leonard@qiclab.scn.rain.com (Leonard Erickson)
Newsgroups: comp.os.msdos.programmer
Subject: Re: XMS vs EMS (performance)
Message-ID: <1991Feb15.204811.6327@qiclab.scn.rain.com>
Date: 15 Feb 91 20:48:11 GMT
References: <1991Jan30.134859.22160@linus.mitre.org>
Organization: QIC Laboratories/SCN Research of Tigard Oregon
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