MicroPDP-11/23+ cabinet kit cables

Douglas Taylor dj.taylor4 at comcast.net
Fri Jul 26 12:08:30 CDT 2019


Yep, that's the one.  I never thought one would be on ebay.  Imagine 
searching by the part number....


On 7/26/2019 11:23 AM, Noel Chiappa via cctalk wrote:
>      > From: Douglas Taylor
>      > I'm putting together a MicroPDP-11/23 in a BA23 box. Have the M8189 CPU
>      > quad width board and the bulkhead cabinet kit .. how the cabling goes
>      > from the M8189 CPU board to the bulkhead cabinet kit?
> I _think_ this might be the cable you need:
>    https://www.ebay.com/itm/CK-KDF11-CABLE-ONLY-P-N-70-20451-1C/151622708242
> but I'm not familiar with the cab kit, so I'm not sure.
>      > The 10 pin connectors on the CPU board don't seem to be keyed ...
>      > Is there something that gives the orientation away?
> These 10 pin EIA connectors (same in the DLV11-J, KDJ11-B, etc) are keyed,
> with a missing pin. DEC cables for these connectors have a plug in the
> matching hole.
>      > From: Glen Slick
>      > In the photos that I have found of the M8189 console panel there is a
>      > '1' just above the top right of the 20-pin connector indicating Pin 1.
>      > A trace can be seen leading from that pin to the baud rate circuitry.
>      > So that pin would go to Pin 1 of one of the 10-pin connectors on the M8189.
> Y'all love to re-invent the wheel, I see:
>    http://gunkies.org/wiki/DEC_asynchronous_serial_line_pinout#10_pin_header
> I should check to see if the KDJ11-B has the same external baud rate
> selection support, and if so, update the page to add it.
> Oh, that's the other way to tell the orientation, with non-flat-cable cables;
> with the loopback jumper on pins 7&9.
> 	Noel

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