[GreenKeys] Current Loop or RS232?

[Paul Heller]

Thanks to Marc, Dave, Pete and Wayne for the replies thus far.  It is a PDP-8M.  The interface board is M8650. Photo is attached for both the board and the connector. The connecto has 8 femal pins, but only 6 are wired. 

6?? I’ll have to figure the pinouts for that!

I’ll be searching and reading up on this board.  And looking for a male matching connector.

It’s great to have you folks in the community to help me through this identification step

Paul
W2TTY




> On Sep 15, 2017, at 3:43 PM, Paul Heller <paul0926 at comcast.net> wrote:
> 
> After looking a long time I finally got hold of a PDP8. I got it from another ham. The guy I got it from said he used to have a teletype hooked up to it. 
> 
> Is there a way I can determine if it is a current loop or an RS232 interface?  I assume if I guess wrong I could damage the teletype or the terminal board in the computer. Is this a valid worry?
> 
> 
> Thanks for any help. I'm a newbie to DEC computers. Maybe I can finally put that tape relay in my teletype to good use. 
> 
> Paul
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Paul
W2TTY

ITTY:  HTTP://INTERNET-TTY.NET:8000/ITTY

AUTO:  HTTP://INTERNET-TTY.NET:8030/AUTOSTART



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