Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!agate!darkstar!ucscb.UCSC.EDU!unknown
From: unknown@ucscb.UCSC.EDU (The Unknown User)
Newsgroups: comp.sys.apple2
Subject: Re: Hard Drives
Message-ID: <10604@darkstar.ucsc.edu>
Date: 4 Jan 91 06:40:45 GMT
References: <10153@darkstar.ucsc.edu> <1990Dec19.004307.16220@world.std.com> <60242@microsoft.UUCP>
Sender: usenet@darkstar.ucsc.edu
Distribution: usa
Organization: University of California, Santa Cruz; Open Access Computing
Lines: 33


In article <60242@microsoft.UUCP> brianw@microsoft.UUCP (Brian WILLOUGHBY) writes:
>Actually this whole problem is the Mac's fault.  Apple skipped many
>of the command protocols in the Mac SCSI driver routines, because
>they made a lot of assumptions (such as only one bus master, even
>though SCSI supports arbitration).  The result is that there are
>drives which follow the generic SCSI protocol, and drives that rely
>upon the Mac's "SCSI" behavior, particularly the boot phase of the
>Macintosh operation.

	This is going to probably sound bogus because I am telling
stuff I heard from someone I know and know few details, but I could
probably get them if absolutely necessary..

	The Mac, and the Apple II SCSI card, -do- support arbitration.
You can hook a hard drive up to both a Mac and a II at the same time..

	However, the details are what I heard from someone I know. He
worked at Apple for a while, and worked on the Apple // in some way
or another.

	I believe he said Apple had special software or special
instructions or something like that (that weren't very complicated), but
never released the info to the public..

	From what I remember, he said it was pretty easy to do...(make
arbitration possible).

	Take this FOAF ("friend of a friend," a term used a lot on alt.folk-
lore.urban) info how you will, but it's true.
-- 
/Apple II(GS) Forever! unknown@ucscb.ucsc.edu MAIL ME FOR INFO ABOUT CHEAP CDs\
\WRITE TO ORIGIN ABOUT ULTIMA VI //e and IIGS! Mail me for addresses, & info. /