26 Jul
2019
26 Jul
'19
10:08 a.m.
Noel;
Yep, that's the one.? I never thought one would be on ebay.? Imagine
searching by the part number....
Doug
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