Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!agate!violet.berkeley.edu!ilan343
From: ilan343@violet.berkeley.edu (Geraldo Veiga)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: how can you choose which hard drive to boot from?
Message-ID: <1991Mar18.032145.11829@agate.berkeley.edu>
Date: 18 Mar 91 03:21:45 GMT
References: <1991Mar18.005647.22254@nntp-server.caltech.edu>
Sender: usenet@agate.berkeley.edu (USENET Administrator)
Organization: University of California, Berkeley
Lines: 19

In article <1991Mar18.005647.22254@nntp-server.caltech.edu> antonyc@nntp-server.caltech.edu (Antony Chan) writes:
>
>i have two operating systems (msdos and unix) that i want to
>choose between on boot up.  since i also have two hard drives,
>it seems to me that the best way to do it is to have each drive
>have one operating system on it.

I am using pboot which was posted by Thomas Hoberg
(tmh%gmdtub@tub.UUCP) to comp.sys.sysv386 (or was it alt.sources?).
It has a replacement boot program that is installed in your boot
sector.  At boot time it locates all partitions in your disks and
prints a menu asking which partition to boot from.  I have a single
hard disk, but according to the documentation it should work with two
disks.  In my system I can select between MS-DOS 3.3 and ISC 2.2. 
It works.  I am not sure if it would work with other version of DOS
(or UNIX) without changes.

Another alternative is bootmenu which was posted to comp.sources.misc.
(uunet archive has it).