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From: jeff@felix.UUCP (Jeff Wallace)
Newsgroups: net.micro.mac
Subject: SCSI Hdwr Info Needed
Message-ID: <1030@felix.UUCP>
Date: Tue, 1-Apr-86 20:09:52 EST
Article-I.D.: felix.1030
Posted: Tue Apr  1 20:09:52 1986
Date-Received: Wed, 2-Apr-86 20:05:35 EST
Distribution: na
Organization: FileNet Corp., Costa Mesa, CA
Lines: 31


	I'm looking for some help concerning the addition of SCSI to
my 512K.  I have a couple of NCR5385 SCSI Protocol Controller ICs and
thought I might build up my own interface (I know that its probably
cheaper and certainly wiser to simply buy an existing or soon-to-be-
available upgrade but this is partly for fun).

1. Does the Mac+ use this device or its lower cost sibling (5380)?

2. Where in the Mac's physical address space is it located?

3. Is is worth adding a DMA controller?  Do the controllers on some
   of the currently available SCSI drives support transfers =>
   1MByte/s?

4. What is the easiest method at getting to the address, data and
   control buses on the motherboard?  I do not wish to solder to it
   nor make any cuts on it.  Should I just clip onto the 68000?

	The software side of the problem is where I am least
knowledgeable.  Does IM contain info regarding installation of
drivers?  Will I need HFS?  Where can I get any example drivers?

	Any help will greatly be appreciated.  Please mail any
response.  I'll post any received info if others seem to be
interested.  Thankyou in advance.

-- 
					  Jeff Wallace
				{decvax,ucbvax}!trwrb!felix!jeff
				  FileNet Corp. Costa Mesa, CA