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- Newsgroups: comp.os.msdos.misc
- Path: sparky!uunet!haven.umd.edu!decuac!pa.dec.com!engage.pko.dec.com!ncdel.enet.dec.com!ssmith
- From: ssmith@ncdel.enet.dec.com (Sheldon E. Smith)
- Subject: Re: Questions on QEMM386
- Message-ID: <1993Jan22.163744.6443@engage.pko.dec.com>
- Sender: newsdaemon@engage.pko.dec.com (USENET News Daemon)
- Reply-To: ssmith@ncdel.enet.dec.com (Sheldon E. Smith)
- Organization: Digital Equipment Corporation
- References: <21JAN199313503538@elroy.uh.edu>
- Date: Fri, 22 Jan 1993 16:37:44 GMT
- Lines: 40
-
-
- In article <21JAN199313503538@elroy.uh.edu>, elee969@elroy.uh.edu (Brown,
- William J.) writes:
- |>
- |>After loading the network (DECNET pathworks 4.0), Stacker, etc., I have
- |>only about 350k of conventional memory left, not enough to run MS's
- |>programmer's workbench. I've heard of people using QEMM386 to free up
- |>generous amounts of memory. Can anybody give me comments on how QEMM386
- |>works and what sort of improvement I should expect.
- |>
- QEMM386 replaces HIMEM and EMM386 as memory manager. It assumes you have some
- unused space in your PC's Upper Memory to load various and sundry drivers and
- TSRs "high". Note that HIMEM and EMM386 are included with DOS 5.0.
-
- Using HIMEM and EMM386, DOS provides a pair of commands, DEVICEHIGH, and
- LOADHIGH. These prefix existing commands in Config.Sys and Autoexec.Bat such
- that when the program is loaded, the system tries to put it in unused Upper
- Memory space. When I use PATHWORKS 4.1, Stacker 2.0, DOS 5.0, and EMM386 and
- HIMEM, I have 536k free of Conventional Memory.
-
- DEVICEHIGH/LOADHIGH are relatively(?) dumb. They appear to use a first-fit
- algorithm to load programs into the Upper Memory holes. QEMM386 (and 386^MAX)
- have enough sense to record how big the various holes are, how much memory
- each of the drivers and TSRs need, and then controls into which hole each one
- is placed (best-fit). This inevitably provides a nice additional savings of
- Conventional Memory.
-
- If you have DOS 5, try using HIMEM and EMM386 first. If you have Windows 3.1,
- check around your disk for the most recent files. If you still don't have
- enough conventional, get one of the third-party commercial managers.
-
- --
- --------------------------------------------------------------------------------
- -
- Sheldon E. Smith !Email:
- Digital Equipment Corporation ! ssmith%ncdel.enet.dec@decwrl.dec.com
- Minneapolis, Minnesota ! ...!decwrl!ncdel.enet.dec.com!ssmith
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