pdp11/70 / MK11

From: CLASSICCMP_at_trailing-edge.com <(CLASSICCMP_at_trailing-edge.com)>
Date: Thu Apr 6 13:57:32 2000

>Does anybody know if it's possible to run an 11/70 without the MK11 memory
>box ?

Sure, get a MJ11 memory box (or, rather, 4 times as many MJ11's as you
had MK11's) :-).

>I know it can be done with the PEP "update",

There are several other third-party memory boxes/cards available too.

> but I was wondering if there
>is another way, possibly involving standard UNIBUS memory.

I do believe that there's an option to map some of the memory space on the
Unibus into memory space. It probably doesn't work correctly at all if
you're using the Massbus slots for I/O, though, and you certainly can't
get above 124 kWords doing this.

Out of curiosity, why can't you use your MK11's? Not enough power to
run them and the 11/70 at the same time? I had to take multiple 15A
circuits to run my 11/70 with MJ11 memory boxes.

 Tim Shoppa                        Email: shoppa_at_trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
 7328 Bradley Blvd		   Voice: 301-767-5917
 Bethesda, MD, USA 20817           Fax:   301-767-5927
Received on Thu Apr 06 2000 - 13:57:32 BST

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