connecting 33 to PDP-8

From: Charles <>
Date: Tue Dec 17 21:38:33 2002

On Tue, 17 Dec 2002 16:11:32 -0600, you wrote:

>> The -8/E has an M8650 (KL8E) which I've been using with RS232. However,
>> I have 40-way Berg connectors, and the proper AMP flat 8-way Mate-N-Lok
>> connector shells for the 20mA loop, and the male and female pins...
>Sounds like you have the basics covered. Don't forget the short jumper
>wire at the Berg end that directs the TTL output of the KL8E shift
>register to the 20mA output circuit. It's a different loop than the
>one you should have right now on your EIA cable.

I have a PDP-8/I and a Model 33 but there are no connectors at
all. The serial interface card (? M709) is there and if I run
clipleads to the appropriate pins on its backplane socket with a
series resistor to +12v it works, both keyboard and printer.

What pieces am I missing? The above discussion is beyond my
current understanding of DEC interconnect hardware. Should there
be a card that plugs into the backplane somewhere, that has a
pigtail hanging from it, or what? If so, what part number should I
be searching for?

Received on Tue Dec 17 2002 - 21:38:33 GMT

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