PDP-11/53+ Jumpers

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Wed Jun 6 02:22:19 2001

On Jun 5, 22:37, ajp166 wrote:
> Isn't the 11/53 the box name and the cpu being either an 11/73
> or 11/23B? All the 11/53s I've seen had 11/23B cpus (M8189).

No, an 11/53 processor is an M7554, which is a quad board with J11, half a
meg of memory, 2 SLUs, bootstrap, etc. It's rather like an 11/73B but with
added memory (and no PMI capability, I think). It was designed as a low
end system, and IIRC it's slightly slower than an 11/73.

If you saw 11/53 BA23's with 11/23's in them, someone swapped the cards, or
swapped the labels.



-- 
Pete						Peter Turnbull
						Network Manager
						University of York
Received on Wed Jun 06 2001 - 02:22:19 BST

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