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From: mwang@oracle.com (Michael Wang)
Newsgroups: comp.os.msdos.apps
Subject: Re: Anyone using Memory Commander
Message-ID: <1991Mar29.212832.13372@oracle.com>
Date: 29 Mar 91 21:28:32 GMT
References: <2180@raybed2.msd.ray.com>
Sender: news@oracle.com
Reply-To: mwang@oracle.com (Michael Wang)
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Organization: Oracle Corporation, Redwood Shores, CA
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In article <2180@raybed2.msd.ray.com> mwm@raybed2.msd.ray.com (mwm) writes:
>   Hi,
>
>   I'm currently using an older version of 386 Max that Qualitas has
>graciously  :^(  offered to upgrade for more than the mail order price for
>5.1.  So I'm thinking of switching to Memory Commander by V Communications.
>
>   Supposedly, it allows you to get up to 900k contiguous DOS memory for
>applications (I have no idea how they get around the 640k barrier).  It also
>is supposed to allow you to change your memory configuration on the fly
>without rebooting.

I have heard from another person that the way Memory Commander gives
you 900K of DOS memory is by remapping all of the areas reserved for 
video memory to extended memory. Apparently they can even handle programs
that do direct writes to memory by trapping whichever low-level interrupt
handles moving info from DOS memory to the memory on the video board.
This apparently slows things down somewhat, but it may be worth the extra
memory for many applications. Again, this is all second hand information
so take it with a grain of salt.


Michael Wang
mwang@oracle.com