BOOTPICK will update the Master Boot Record on your hardfile to give you a
choice, at boot time, between two operating systems. You can boot DOS or
some other operating system. This copy is set up for a DOS partition that
is indicated by the partition entry starting at offset X'01EE' in the
Master Boot Record (cylinder 0, head 0, sector 1), and a XENIX partition.
The program will attempt to find the second partition and not update your disk
if it fails to find a second one. It assumes the one at X'01EE' is DOS.
You can use DEBUG or a zap program to modify the message at X'3A0' to another
16-character message you prefer. (If you don't know how to do this, better
not do it or get help from someone who does.) As set up here, entering 'x'
(lower-case 'x', NOT upper-case!) in response to the message on the screen
at boot time will boot the XENIX (or second) partition; any other keystroke
(including a simple carriage return) will result in booting the DOS partition
(the one whose entry is at offset X'01EE'). Good luck and have a good time.