9 Jul
2009
9 Jul
'09
1:05 p.m.
Date: Thu, 9 Jul 2009 12:00:48 -0400
From: Ethan Dicks <ethan.dicks at gmail.com>
I tried to look that up and found it easy to see that
the IIfx needed
something odd (I couldn't find specifics), so well done there. It
would be interesting to get the details to see where Apple went off
the rails from the SCSI spec.
IIRC, it's a matter of adding a capacitor and maybe a resistor to a
regular terminator. There's an Apple Technical Note or similar available
somewhere. I probably have a copy squirreled away on my hard drive at
home. And I think I remember that they use a somewhat higher value
capacitor (so add a smaller one in parallel on an existing terminator) and
a lower resistance (so again, add a resistor in parallel). But I could
be misremembering.
Again, IIRC, the IIfx's SCSI was too noise sensitive. But I've also
heard/read that that was only true for the early production run and that
the later built machines did not need the funny terminator.
Then I would
only need to find an AUI to RJ-45 doodad
which is skinny enough to fit into the recessed ports on the IIfx. I
have an AUI thingy now, but it's too fat to reach the db-15 connector
on the network card.
http://lowendmac.com/ii/macintosh-iifx.html
Are you sure that's an AUI connection? I would expect a Mac of that
vintage to have a DA-15 for video but not Ethernet.