Is EMS more efficient than XMS in 386's?

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#6099

From: Bryan S. So
Date: Wed, 08 May 1991 23:05

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I read in Extending DOS edited by Ray Duncan that EMS makes use
of 386's hardware page mapping technique to map extended memory
to conventional memory area.  So, is this more efficient than
XMS which copies extended memory to conventional memory?

Or are they the same because HIMEM.SYS will also utilize mapping
technique even though it looks like copying?


Bryan

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From: so@brownie.cs.wisc.edu (Bryan S. So)
Newsgroups: comp.os.msdos.programmer
Subject: Is EMS more efficient than XMS in 386's?
Message-ID: <1991May8.230557.5313@spool.cs.wisc.edu>
Date: 8 May 91 23:05:57 GMT
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Organization: U of Wisconsin CS Dept
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