A few PDP11 questions and FREE Cipher tape drive

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Sun Apr 22 23:44:52 2001

At 07:04 PM 4/21/01 -0400, you wrote:
>My 11 came with a 3 4-port serial cards. They are M8043 boards. I
>can't see myself using that many serial ports. Does anybody have the
>little blank steel plates to put in a BA23 chassis so I can remove the
>plates that have the 4 db25 connectors?

Yup, send me your snail mail address.

>Also, I need the plate that fits into the space below the serial ports.
>It looks to be slightly larger than a centronics 50 SCSI connector.

Got that too :-)

>Would anybody have the dip switch and jumper settings for a M8190-AE,
>that's a KDJ11-B from a 73 or 83. My 11 was upgraded from a 53.

Can't help there.

>How about memory?

<snip>
ECC is better than parity, it actually fixes problems it detects.

> One of my parity boards says "Mos RAM" What us that?

Memory made out of integrated circuits (Metal-Oxide-Semiconductor) versus
"CORE RAM" which would be memory made out of magnetic cores.

>I am thinking that I would like to keep the chassis out of the tower.
>Does anybody have a spare plastic bezel for a rackmount setup. I don't
>have a rack, but it would take up less room if I keep the tower in
>storage.

I've got the bezel too but it won't help you unless you find someone to get
you the latches that it attaches to (I do not have an extra of those). They
have two heavy duty velcro circles on them. Also the BA23 in the rack sits
in a "tray" that mounts to the rack. If you do decide to actually rack
mount it you will need one of those too.

>What to call this thing? It has the cpu board from an 11/83, but it
>doesn't have the PMI memory of an 83. I would like to upgrade the
>little square badge to reflect its current config.

Franken-11. Something the field books never intended. :-)

Note to Brian Roth - email to you from me bounces.
--Chuck
Received on Sun Apr 22 2001 - 23:44:52 BST