Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!ntvaxb!ie15
From: ie15@vaxb.acs.unt.edu
Newsgroups: comp.os.os2.programmer
Subject: Re: DOS window on PS/2
Message-ID: <33583.26dfb85a@vaxb.acs.unt.edu>
Date: 1 Sep 90 13:32:10 GMT
References: <10361.26b816b8@ecs.umass.edu>
Lines: 22

In article <10361.26b816b8@ecs.umass.edu>, mohamed@ecs.umass.edu writes:
> 
> Running OS/2 and other misc software cut the hard disk memory down to 
> 17 Mb. That's not the real problem. The DOS shell seems to have only 470 K
> of RAM. 
> 
> That's less than the 640K (- util etc) of RAM for a regular PC-AT. Actually,
> we were expecting to have a DOS shell with more than or atleast equal to
> 1 MB of RAM (like some Compaqs etc). Is there any way of increasing the
> available RAM for the DOS shell ?
> 

There are no REAL ways to increase the DOS Box size. If RMSIZE = 640 that is
the only memory increaser. You could attempt to limit the memory taken by 
decreasing FCBs and BUFFERs though.
 
Since OS/2 tries to emulate DOS 3.3 exactly you get the dpressing 640KB
barrier yet again. To top it off OS/2 loads ALL sytem device drivers in the
lower megabyte of system memory, i.e. the DOS Box segment loses memory again.

Ken Tabor
University of North Texas