31 Mar
1999
31 Mar
'99
4:03 p.m.
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 '@' 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 |
+--------------------------------+-------------------------------------+