dkb@cs.brown.edu (Dilip Barman) (03/15/90)
I am having problems with DOS 4.0 in installing a virtual disk
(this used to be easy in DOS 2.x!). I am running on a PS/2-70 E61 and
normally run OS/2 1.1 (there's no way to have a VDISK from within the
DOS box under OS/2, is there?) but sometimes boot DOS 4.0.
I would like to specify that DOS use all the memory (I have 8 Meg
installed) not normally accessible as virtual disk. By the way, is
there any reason I should create 2 disks, say @ 2 Meg and 6 Meg?
Actually, I should be able to use 6 Meg + (1 Meg - 640K), right?
Anyway, VDISK won't install (the "Using DOS" book isn't very helpful).
I'll include my CONFIG.SYS file and the resulting output. Can anybody
suggest what might be wrong?? Thanks in advance!
Dilip Barman
P.S. I know that my VDISK invokation below specifies a 1 Meg
disk. VDISK with no parameters and VDISK with just /X don't
work, so I finally copied the sample they had in the book.
------My CONFIG.SYS file------------------------------------------------
REM Dilip Barman March 14, 1990 CONFIG.SYS for DOS 4.0 bootable disk
REM
DEVICE=C:\DOS40\XMAEM.SYS
DEVICE=C:\DOS40\XMA2EMS.SYS P254=C000 P255=C400
REM XMAEM then XMA2EMS allows use all of memory above 1 MB line
REM (i.e., expanded memory)
REM Now specify that it all be used by a virtual disk
DEVICE=C:\DOS40\VDISK.SYS 1024 512 256 /X:8
------Resulting output messages-----------------------------------------
80386 XMA Emulator Version 1.10
(C) Copyright IBM Corporation 1987, 1988 All rights reserved
80386 XMA Emulator installed
XMA2EMS: Expanded Memory Manager
(c)Copyright IBM Corporation 1988 All rights reserved
IBM DOS Version 4.00, VDISK virtual disk D:
VDISK not installed - Insufficient memory
WARNING! SHARE should be loaded for large media
-----------------------------------------------------------------------
Dilip Barman dkb@cs.brown.edu
U.S. mail: Brown University Home: 19 Elton Street
Dept. of Computer Science, Box 1910 Providence, RI 02906
Providence, RI 02912 (401)863-7666 (401)521-9731