Date:	Fri, 13 Feb 1998 17:01:42 +0100
From:	Matthias Paul <PAUL-MA AT reze-1 DOT rz DOT rwth-aachen DOT de>
Subject:	Re: 7.02 bugs and problems
To:	opendos AT delorie DOT com
Reply-to:	Matthias DOT Paul AT post DOT rwth-aachen DOT de
Message-id:	<16F26A24446@reze-1.rz.rwth-aachen.de>
Organization:	Rechenzentrum RWTH Aachen

On 05 Feb 1998 Pavel Ozerski wrote:

> 1. Something about bugs in the 7.02 final release...
> HMA management.
> My assumption about the bug seems to be true: Caldera used Novell's source
> code without taking into account the bloating of the COMMAND.COM.
> [...]
Your observation concerning the "COMMAND.COM in HMA problem" is 
absolutely correct, but this temporary limitation has already been 
discussed in details in the past. The issue will most probably be
gone in the next release.

For DR-DOS 7.02 a solution is to use the new SHELLHIGH= directive 
instead of the traditional SHELL=. The difference between SHELL=
and SHELLHIGH= is that the later accepts an additional SIZE= parameter
(hex) for the amount of memory to be reserved for COMMAND.COM in the
HMA. Note, that to load COMMAND.COM into the HMA you still have to 
provide the /MH option, SHELLHIGH= does NOT do this my itself e.g.

replace 

SHELL=c:\opendos\command.com c:\opendos\ /MH /P

by

SHELLHIGH SIZE=xxxx c:\opendos\command.com c:\opendos\ /MH /P

whereby 

SIZE= shall be something between 1000 and 2000 hex here (Sorry, 
I don't know the optimal value right now, so one should iterate
this value to the lowest possible value). To high values will
prohibit other parts of the system to be loaded in the HMA or
at least causing unnecessary HMA fragmentation. If COMMAND.COM 
is not loaded into the HMA (e.g. when using 4DOS instead), it 
is a good idea to set SIZE=20 (the minimum). This will cause
larger contineous chunks of HMA memory to be provided for usage 
by other HMA clients like for example ANSIPLUS.

Matthias

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