Teletype as Program Storage for Kim 1
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Teletype as Program Storage for Kim 1 |
by Bill Degnan - 08/28/2014 00:11 |
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Per
http://www.kim-1.com/usrman.htm#F24 I am working to set up my KIM to a teletype (not using rs232) using current loop/papertape old school. I have mine wired up now, but have not actually powered on to test. I have what I think is right, but first I want to do more research.... I think it's: application pin T --> Teletype terminal strip connector 6, "what KIM schematic calls the keyboard" U --> 3 "KIM schematic calls the printer" R --> 7 "KIM keyboard return" S --> 4 "printer return" I am basing this on PDP 11 and PDP 8 documentation where (and this works) "transmitted data -" goes to terminal strip connector 6 "transmitted data +" connects to TS 7 "received data -" to TS 3 "received data +" to TS 4 SO, I guess I am wondering if: "printer" in the KIM docs is the same thing as "received data -" in the DEC pdp docs "keyboard" in KIM docs is the same thing as "transmitted data -" in the DEC pdp docs "keyboard return" in KIM docs is the same thing as "transmitted data +" in the DEC pdp docs "printer return" in KIM docs is the same thing as "received data +" in the DOC pdp docs. Also, I plan to put a 470ohm resistor between N and R per KIM Hints I read in link above. Reply |
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470 ohm resistor ?? |
by Bill Degnan - 08/28/2014 11:46 |
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putting a 470 ohm resistor between N and R caused the 12v line to smoke. pulled quickly, no damage done. ??
I missed the little detail DON'T RE-CONNECT PIN R !!! Reply |
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