To incorporate the Compaq keyboard click feature, copy MODE.COM from
the previous version of Compaq DOS to your hard drive.
Before copying the file to your DOS subdirectory, rename it to
distinguish it from the MS-DOS 5.0 or later version of MODE.COM. For
example, MODE41.COM or MODE33.COM, for versions 4.01 or 3.3
After copying and renaming the file, use the SETVER command to update
the version of DOS reported to MODEXX.COM. See page 561 in the version
5.0 "Microsoft MS-DOS User's Guide and Reference" for more information
about the SETVER command.
You must also change the AUTOEXEC.BAT file to reflect the new
filename. For example, the new line will read:
The above line in the AUTOEXEC.BAT file sets the duration of the
keyboard click tone. Valid values for "n" are from 0 to 127. If you
set n=0, there is no sound. The higher the number, the louder the
The MODE CLI = n feature is specific to Compaq DOS.