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- Path: sparky!uunet!wupost!usc!news.service.uci.edu!cerritos.edu!wilbur!batpad!mike
- Newsgroups: comp.os.msdos.desqview
- Subject: Re: How does Phar Lap DOS Extender 286 allocated its memory from QEMM?
- Message-ID: <mike03610921127170455@batpad.lgb.ca.us>
- From: mike@batpad.lgb.ca.us (mike batchelor)
- Date: Sun, 27 Dec 92 17:04:55 PDT
- References: <2b331710@ralf>
- Distribution: world
- Organization: The Batchelor Pad
- Lines: 22
-
- Ralf.Brown@B.GP.CS.CMU.EDU writes:
- >
- > In article <1992Dec17.225657.3463@qdeck.com>, garyrich@qdeck.com (Gary Rich) wrote:
- > }In article <1992Dec14.222004.594@midway.uchicago.edu> pynq@midway.uchicago.edu writes:
- > }Um, no. The Phar Lap extender uses VCPI. A much more robust spec than
- > }XMS (or DPMI for that matter)
- >
- > VCPI simpler than DPMI? Definitely.
- > VCPI more robust than DPMI? Doubt it. VCPI runs clients in ring 0 (most
- > privileged), so a VCPI app can bring down the entire system. DPMI runs clients
- > in ring 3 (least privileged), so it has a fair chance of keeping the crash to
- > a single client, assuming the host is well-implemented.
-
- Assuming the client is well-implemented, it won't bring down the
- system no matter which ring it runs in, or which well-implemented host
- it makes use of.
-
-
-
- [] ---
- [] Mike Batchelor <> Long Beach, California
- [] mike@batpad.lgb.ca.us <or> mikebat@qdeck.com
-