RK05 interfacing to unibus PDP-11 (was RK05 stuff)

From: Paul Koning <pkoning_at_equallogic.com>
Date: Wed Jul 21 08:18:33 2004

>>>>> "Ethan" == Ethan Dicks <dickset_at_amanda.spole.gov> writes:

 Ethan> On Mon, Jul 19, 2004 at 11:50:10PM -0400, Ashley Carder wrote:
>> I looked in my 11/34 CPU box. There's room for a 4-slot
>> backplane. I currently have two 9-slot backplanes. Can I use an
>> M9202 to connect the 9-slot backplane to the RK11-D 4-slot
>> backplane?

 Ethan> Yes. That's what you should use (as opposed to the older
 Ethan> M920s - they changed the length of the cable to minimize bus
 Ethan> reflection)
 
That's probably a good default rule, but it's simplifying things a
bit. The full answer is "do what the Unibus config rules say". You
can use the M920 so long as the "lumped loads" are not too big.
Likewise, you can use the M9202 so long as the total cable length
doesn't exceed the limit.

        paul
Received on Wed Jul 21 2004 - 08:18:33 BST