Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!ukma!simon
From: simon@ms.uky.edu (Simon Gales)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Expanded vs. Extended mnemonic.
Message-ID: <10650@s.ms.uky.edu>
Date: 4 Dec 88 15:09:32 GMT
References: <36835@clyde.ATT.COM> <42393@linus.UUCP>
Reply-To: simon@ms.uky.edu (Simon Gales)
Organization: U of Kentucky, Mathematical Sciences
Lines: 29

In article <42393@linus.UUCP> jcmorris@mbunix (Morris) writes:
>
>exTended: what you get with an AT.  Memory is available as normal, DOS-
>managed address space.  Available only on '286 and higher systems; no 8088's
>need apply.
>

Just to avoid another round in this discussion, exTended memory is normal
memory on an AT that is beyond the 1meg 'barrier'.  The 'barrier' is there
because the 286 cannot access it without using protected mode.

(Actually the first 64k of exTended ram can be accessed but this is another 
 story)

DOS cannot execute code from exTended ram, so programs must still fit into
the 1st 640k.  Virtual (Ram) disks, print spoolers, FastOpen (DOS 4.0),
BUFFERS= (DOS 4.0), and exPanded memory emulators are some things that can 
use exTended memory.

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