[GreenKeys] Current Loop or RS232?

[Justin Scott]

Late to the game here - but looks like others have mostly covered it.

If it's M8650 as you stated, it can be either - the configuration is done in the way the cable gets pinned out at the BERG connector on the card.  Certain pins in the cable jumper back to the board to configure it specific to the type of cable that is plugged in.  The jumpers on the card take care of the rest.

cheers,
dj

Paul Heller(paul0926) 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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