decserver 550 in Kansas City - test-drb@ccmp.vtda.org

27 Feb 2003

On Feb 27,  9:35, McFadden, Mike wrote:
...
  Wandering through the local surplus I found a
decserver 550 in a full height
...
  rack.

 It had the following boards in it.

 4 X CXA16-M   M3118
 1 X   M3127
 1 X KDJ11-SD  M7554

 Bulkheads, power supply, and cables

 I read somewhere that it could be converted to a 11/53 with a minimal
 effort.  How much trouble? 
Well, it will never be exactly an 11/53, since it's in the wrong box,
but you can make it effectively equivalent.   I'd remove the CXA16-M
serial multiplexers, which I don't think any normal PDP-11 OSs support,
but the DESQA should be OK; it'll look to any OS just like a DELQA.
 You'll need to change the two boot EPROMs on the KDJ11 board.  The
standard boot ROMs for a microPDP-11/53 are 23-261E5 and 23-262E5.  You
might get lucky if you type either of those numbers into Google ;-)

-- 
Pete						Peter Turnbull
						Network Manager
						University of York