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From: maciag@spar.UUCP (Chris Maciag)
Newsgroups: net.micro.pc
Subject: PC/XT Help Needed
Message-ID: <72@spar.UUCP>
Date: Thu, 7-Feb-85 17:35:44 EST
Article-I.D.: spar.72
Posted: Thu Feb  7 17:35:44 1985
Date-Received: Fri, 8-Feb-85 09:54:38 EST
Organization: Schlumberger Palo Alto Research, CA
Lines: 16

I am currently running MS-DOS and PC/IX (a bad copy of Unix System 3) on
an IBM XT.  Unfortunately, PC/IX can only be loaded from the active
partition.  I would like to be able to run a program from MS-DOS that
would bring up PC/IX, and vice-versa if possible (either way will be
extremely helpful).  To do this, I need to:

Read sector 0 of the fixed disk (C:)
change the 10th byte of the sector to
Write the the sector back (with change)
Reboot Fixed Disk (not a neccessity)

It would be good if this could be done independent of MS-DOS, that way I
could use the same routine, with a few changes, to get back to MS-DOS.
Any help you can give me will be greatly appreciated.

		Chris Maciag