Another DEC KL8-AA Question

[Rick Murphy]

At 06:26 PM 7/12/2005, Joe R. wrote:
>
>
>    FIRST. This is NOT the panel that I was describing in my earlier
>question about the KL8 stuff. This is an entirely different panel.
>
>    Does anyone recognize this panel?  It's marked KL8-AA M8319 on the 
> back.
>But it's marked by hand so that may not be accurate. It has two ribbon
>cable connectors that I'm guessing connect to one or two M8319 cards. It
>also has eight Mate-N-Lock connectors marked J2 through J5 and J7 through
>J10. It also has eight DB-25M connectors marked P1 though P4 and P5 
>through
>P8. Just as a guess I'd say that it can use the cables with the 
>Mate-N-Lock
>connectors or cables with DB-25F connectors and it looks like it can 
>handle
>a total of eight serial data lines. Anybody know if that's correct or what
>machine it's for?

The KL8-A is a M8319 card. It's a four channel serial line controller.
It'll do RS232 or 20mA current loop, one line with modem control.
The patch panel (a H326) that you're describing connects to two M8319 
cards for 8 serial lines. There were cables that provided four serial 
outputs without the patch panel; apparently you have one or more of those.
Bitsavers has a copy of the KL8-A documentation.
http://www.bitsavers.org/pdf/dec/pdp8/EK-KL80A-OP-001_KL8-A_jan78.pdf
         -Rick