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From: carl@DISTANCE (Carl Tollander)
Newsgroups: comp.sys.mac
Subject: L5380 SCSI chip?
Message-ID: <8712072213.AA00774@distance.ads.arpa>
Date: Mon, 7-Dec-87 17:13:00 EST
Article-I.D.: distance.8712072213.AA00774
Posted: Mon Dec  7 17:13:00 1987
Date-Received: Sun, 13-Dec-87 04:48:08 EST
Sender: daemon@zodiac.UUCP
Lines: 22

In the November Byte, page 14, there is an article "Controller Chips
Add More Zip to SCSI".  Mentioned is the Logic Devices L5380 SCSI controller
chip, which is reputed to double the data transfer rate of the SCSI
interface.  The article says that the chip is designed to be a direct
substitution for the NCR 5380, which is used in the Mac.

After wading through the article, I infer that what we have here is
actually a chip set, with one used in the hard drive and one used in
the Mac itself, and that no other modifications are necessary other 
than to replace the chips.

I expect to obtain a Mac II soon with a Jasmine Inner-90 hard drive,
and am understandably interested in such a chip swap.  I don't know
enough about about SCSI interfaces yet to tell if this (the swap)
is just wishful thinking, or if there is something to it.

Has anyone tried this?  I'm not sure that it would be worth it if the
drive could not take advantage of the extra interface speed.

--------------------------------------------------------------------------
Carl Tollander
ARPANet: carl@ads.com