PDP-11/34A rebuild project Was: Re: Post-move diary

From: Megan <mbg_at_world.std.com>
Date: Thu Apr 1 08:58:23 1999

>Wow! Cool! Looks like you have a W9042 Extender Board which is
>specifically described as part of the FP11-A Option in my KK11-A tech
>manual and by association, one is also part of the KK11-A cache option.
>The manual mentions: "The W9042 Extender board Assy. is stored in the
>backplane and used for some maintenance operations."

Great...

>When you have to use an extender board to troubleshoot the adjacent M8265
>in a cache-option-only system, the W9042 plugs into the top connector on
>the M8268 Cache module and then the over-the-top connector plugs the two
>together. If troubleshooting the M8268, then the W9042 is plugged into
>the top conn of the 8265 and the o-t-t conn board connects both together.
>Neat!

Aha... that was the missing piece... having one of the boards on an
extender... it all makes sense now...

>Same for troubleshooting the systems with both cache and FP11 options
>except two W9042s are used.

I actually seem to remember another one somewhere in my collection,
I'll have to check someday to see if it is...

>I've got an extra set of them too plus a cache. No spare FP11 tho. Notice
>how heavy that FP11 is? Sure is a lot of 'stone' in all those AMD 2901s!

Yep... :-)

                                        Megan Gentry
                                        Former RT-11 Developer

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| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
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Received on Thu Apr 01 1999 - 08:58:23 BST

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