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1991-02-01
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MBOOT
Douglas Boling February 26, 1991 (Utilities)
Purpose: Permits selection at boot-up of up to four configurations
(sessions), each of which may use a different CONFIG.SYS, AUTOEXEC.BAT, and
version of DOS; one session may use OS/2. Provides adjustable timeout for
default session and menu-driven installation and selection procedure.
Format: MBOOT d:
Remarks: MBOOT must be installed on a boot drive or diskette, so d: is
normally limited to C: or A:. The various sessions are initially set up
through a conventionally-controlled menu system before MBOOT itself is
finally installed with the Install menu option. MBOOT replaces the normal
DOS boot record on the disk and gains control so that it can rename and write
the needed DOS system files in their required locations. MBOOT also renames
the various user-prepared CONFIG.x and AUTOEXEC.x files, all of which must be
stored in the root directory, to CONFIG.SYS and AUTOEXEC.BAT, as appropriate
for the specified session.
The largest (latest) version of DOS to be used should be installed
on the PC before installing MBOOT. Subsequent DOS versions may then be
addedfrom MBOOT's Load Operating System Menu. Other version-specific DOS
command files, including COMMAND.COM, must be kept in separate directories
for each DOS version. The user-prepared CONFIG.x and AUTOEXEC.x files must
each contain a line to specify this directory. Thus, assuming a a boot drive
C: with a \dos32 version directory, the root directory CONFIG.32 file should
contain the line
shell=c:\dos32\command.com /p
and the root directory AUTOEXEC.32 file should contain
set comspec=c:\dos32\command.com
If OS/2 is to be used for one of the sessions, it must be
installed with its own procedure and with its dual-boot option. MBOOT is then
installed from DOS and not from the OS/2 DOS Compatibility Box. Note that
MBOOT cannot be installed on a machine using the new OS/2 HPFS (high
performance file system) format.
Note: Back up your hard disk before installing MBOOT. While it has been
successfully tested on variety of machines, this precaution should be taken
with any program, such as MBOOT, that writes to the boot-up clusters of the
disk.