cctalk Digest, Vol 70, Issue 3 - test-drb@ccmp.vtda.org

2 Jun 2009

On Mon, Jun 1, 2009 at 3:23 AM, Josh Dersch <derschjo at mail.msu.edu> wrote:

...
  Here's a question:  The M9300 Ian lent me has
three jumpers, labeled as
 follows:

 W1 : "Remove jumper for beginning of non processor bus termination"
 W2 : "Remove jumper for end of bus termination"
 W3 : "Remove jumper for end of processor bus termination"

 Currently, W1 is installed, W2 and W3 are removed.  Is this correct? 
Don't know for sure. Look in a manual? :-)

...
  I'm curious what is meant by "processor
bus" vs. just "bus" in this  context
...
  -- can someone fill me in? 
Some CPUs (can't remember about the 11/40 anymore) use an M930 (or 
M9300) at the beginning of the CPU as well as at the end of the Unibus. 
The 11/70 for example.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol