From: DH473 AT AOL DOT COM
Message-ID: <418d5072.24b668c5@aol.com>
Date: Thu, 8 Jul 1999 16:49:09 EDT
Subject: Re: DRDOS 7.03 loading XMS-driver now wastes memory
To: opendos AT delorie DOT com
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Reply-To: opendos AT delorie DOT com

On Mon, 28 Jun 1999 Matthias Paul <PAUL-MA AT reze-1 DOT rz DOT rwth-aachen DOT de> wrote:

>Using certain issues of 3rd party HIMEM.SYS XMS 
>drivers under DR-DOS 7.02+ (1998-04-16) or later may 
>cause the XMS driver to consume as much as 35 Kb of 
>low memory.

>a (temporary) workaround is to patch the DR-DOS 
>IBMBIO.COM to reserve only 16A0h bytes instead of 
>2160h bytes for the primary COMMAND.COM shell. The 
>workaround, however, may imply sub-optimal memory 
>allocation when DOS resides in the HMA and/or 
>COMMAND.COM is relocated into the HMA. 

>Field experiences are most welcome...

It works exactly as you stated.
3rd party HIMEM.SYS consumes 0.7K again.
Memory allocation in the HMA is less optimal.
You can move command.com into the hma at the cost 
of relocating the DOS kernel code out of the hma :-((

Does the IBM HIMEM.SYS occupy a chunk of memory in the hma for its own use?
Or what is the patch about?

>Matthias

Regards, 
Utz

<dh473 AT aol DOT com>