PDP-11/70 Boards

Fritz Mueller fritzm at fritzm.org
Tue Nov 30 14:04:43 CST 2021

> On 11/30/21 10:06 AM, Noel Chiappa via cctalk wrote:
> From the blog of someone who got a KB11-A working, you'll really need KM11
> cards...

> On Nov 30, 2021, at 10:59 AM, Guy Sotomayor via cctalk <cctalk at classiccmp.org> wrote:
> I do still have KM11 boards and some overlays (I'd have to check to see if I have the appropriate overlays for the 11/70).  I don't unfortunately have any light masks or full kits.

I built mine from a layout on Tom Uban’s site: http://www.ubanproductions.com/museum.html <http://www.ubanproductions.com/museum.html>.  I have found the single long board form factor convenient, but they don’t have nice light dividers and overlays like Guy’s.

Agreed that at least one of these, as well as a hex extender card, are absolutely essential if you need to debug CPU/MMU/FPU cards (which, given their age, is nearly guaranteed unless you are getting them pre-checked/repaired from another restorer.)


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