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
Received on Thu Feb 27 2003 - 13:04:42 GMT