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Article View: comp.sys.ibm.pc.misc
Article #9480

Re: Command.com in ramdisk

#9480
From: Noam Mendelson
Date: Wed, 24 Apr 1991 19:47
35 lines
2184 bytes
In article <34067@ccicpg.UUCP> mhr@ccicpg.UUCP (MHR {who?}) writes:
>Whoa, hold on a moment there.
>The upper 384k of the first megabyte of memory on a PC _is_ EMS memory.

It is NOT EMS memory.  EMS memory is a specification which allows 8086's
to access data above 1M by simulating a 64K page in high memory and
changing pages when different areas of the EMS memory are required.

>Why would anyone want to go out and get an EMS emulator whic requires
>XMS (extended memory spec) memory when they already have the EMS they
>need?

Because EMS memory is a standard.  Many programs can't make use of
extended memory, and by emulating EMS you're giving them access to it.

>Now if Adam's 384k had been the first 384k on the far side of the first
>megabyte, your advice would have been more appropriate, but I think you
>may have misunderstood what he was saying (or I did, in which case
>ignore this post).

You've got it reversed.

>Besides, I side with the previous responder to Adam's post who suggested
>that he use it for a disk cache.  I find that use to be eminently
>suitable for my extra k.

Agreed.  A disk cache is a good choice if you want a general
improvement in disk speed, since there are areas of the disk that
are accessed frequently (such as the FAT and directory area).

-- 
+==========================================================================+
| Noam Mendelson   ..!ucbvax!web!c60b-1eq       | "I haven't lost my mind, |
| c60b-1eq@web.Berkeley.EDU                     |  it's backed up on tape  |
| University of California at Berkeley          |  somewhere."             |
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From: c60b-1eq@e260-1e.berkeley.edu (Noam Mendelson)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: Command.com in ramdisk
Message-ID: <1991Apr24.194745.13507@agate.berkeley.edu>
Date: 24 Apr 91 19:47:45 GMT
References: <cs352a41.671590865@zippy> <WARKENTI.91Apr19143349@syscad8.CAE.Mitel.Com> <34067@ccicpg.UUCP>
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