jeff@felix.UUCP (Jeff Wallace) (04/02/86)
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