Q103521: DEVICEHIGH Uses UMB from Previous DEVICEHIGH Command

Article: Q103521
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.2,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 18-NOV-1999

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 6.2, 6.22 
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SUMMARY
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This information applies to both Microsoft DoubleSpace and Microsoft DriveSpace.
For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands and filenames.

SYMPTOMS
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If you have a DEVICEHIGH statement without an explicit /L parameter, MS-DOS uses
the same upper memory block (UMB) as the last DEVICEHIGH command that did have
an explicit /L parameter. For example, if you have the following commands in
your CONFIG.SYS file, RAMDRIVE.SYS loads into region two:

  devicehigh/l:1=c:\dos\ansi.sys
  devicehigh/l:2=c:\dos\dblspace.sys
  devicehigh=c:\dos\ramdrive.sys

If you remove the DEVICEHIGH command for DBLSPACE.SYS, RAMDRIVE.SYS loads into
region one.

NOTE: This example assumes both UMBs are large enough to hold RAMDRIVE.SYS.

Additional query words: 6.20

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS622 kbMSDOS620
Version           : MS-DOS:6.2,6.22

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