PDP-11/53+ Jumpers

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Wed Jun 6 20:43:07 2001

From: Pete Turnbull <pete_at_dunnington.u-net.com>

>On Jun 6, 19:34, ajp166 wrote:
>> I have a 11/73 and several 11/23s (some with clock mods for speed)
>> so I'm aware of what I said. MOST early 11/53 boxen actually had
>> cpu cards (M8189).
>Allison, for once I feel you're wrong. An 11/53 is a distinct processor
>released a few years after the 11/73 and 11/83, as a low-cost option for

What part of what I wrote is unclear? The comment is most 11/53s I've
seen contained 11/23B cpus. that maybe "not as shipped" but very

>office use. When it was announced (1987), it was as a J11 processor
>separate I&D space and RAM on the processor card -- which no 11/23 has.
>never heard of one having an 11/23 as shipped by DEC.

Never said it was. I said many early 11/53boxen HAD 11/23s not they
with 11/23s. Seems they were fertile ground for modified systems.

>It's listed in the 1987 PDP-11 Systems Handbook. Maybe Megan could look
>up (I believe she has a copy?)?

I have it.

Received on Wed Jun 06 2001 - 20:43:07 BST

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:33:57 BST