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From: dwb@well.UUCP
Newsgroups: comp.sys.mac
Subject: Re: Dataframe SCSI (was Mac SCSI perf. (was Mac-Sun SCSI connection))
Message-ID: <2666@well.UUCP>
Date: Fri, 27-Feb-87 04:33:37 EST
Article-I.D.: well.2666
Posted: Fri Feb 27 04:33:37 1987
Date-Received: Sun, 1-Mar-87 08:45:40 EST
References: <6341@mhuxu.UUCP> <5760@amdahl.UUCP>
Reply-To: dwb@well.UUCP (David W. Berry)
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 16
Keywords: Supermac Dataframe XP "Lots of other trademarks" SCSI MonsterMac

The reason the DataFrame XP20 works fine on your MonsterMac even though
it is timing dependent and the Monster gives you a performance improvement
is that the DataFrame XP driver jumps into the ROM.  This solves two
things.  First, the timing is consistent between the two because the
Monster only executes out of some ram faster, the ROM code runs the
same.  Second you don't have to worry about your dataframe still running
under newer roms or machines.  It flat won't...  By the way, another
vendor that do the same thing (jump into the rom) and therefore perhaps
ought to be seriously thought about is MDIdeas with their TDBK tape
drives.

	David
-- 
	David W. Berry
	dwb@well.uucp                   dwb@Delphi
	dwb@GEnie                       293-0752@408.MaBell