>They go from the 10 pin connectors on the frontpanel control board
>(KY11B) to either the spare 10 pin connectors on the FPU next to the top
>connector or to the 2 10 pin blocks of the connector on the CPU
>(control?) board that the FPU top connector goes onto (this will make
>sense if you're looking at the machine). Again I can't remember the
>twists, but try it until maintenance mode works, I guess.
I figured that's what they did... but I didn't want to simply plug them
in without knowing which way was correct, and which way *might* let some
magic smoke escape...
I found the 10-pin ribbon cables in some sort of paddle board which is
marked as an FP11-A extender board... it has male and female connectors
of the type used to connect the CPU and FPU, but at opposite ends of the
board. It *also* has two sets of fingers, one of which is *obviously*
wire as a grant card... what the heck is this thing, and how is it used?
BTW - I found an extra set of KD11-EA processor boards... so I
tested them in my machine today and they worked fine. I'm glad to know
that I have some spares for the machine...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '_at_' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL:
http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
Received on Wed Mar 31 1999 - 16:03:12 BST