Boot process with boot manager on diskette
When a diskette is booted the first sector of the diskette is read
and executed. Normally this sector would be the boot sector of an
operating system. Now the first sector of the diskette contains the first
part (LOADR-US) of the boot manager Boot-US.
When executed, LOADR-US
loads the main part of the boot manager (BMGR-US)
from diskette and starts
this main part (BMGR-US).
From this moment the boot process is identical to the boot process where
the boot manager is installed on a primary partition.
Thus the user
selects one of the configured partitions and the boot manager loads
and executes the boot sector of this partition. This will boot the