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- TNC220.2
- 9600 FULLDUPLEX on the Pac-Comm TNC-220
- by D. Hulatt G4WFQ 19th Aug 90
- ------------------------------
-
- Locate 74HC4020 and remove from IC socket
-
- CAREFULLY bend pins 1 and 12 up
-
- Solder flying leads to pins 1 and 12 on 74HC4020
-
- Solder flying lead to pin 12 on SIO 8530 chip
-
- Use a SPDT switch to switch to 2 signals from 4020 to SIO
-
- Replace 4020
-
- Drill 1/4 inch hole in rear plate above RS232 slot
-
- Insert switch and secure.
-
- Thats it. Throw switch for 9600 FULLDUPLEX operation, revert for
- normal. NB: You still have to change buad rate in s/w.
-
- I hope this information will be of use to some. I would like to thank
- Uk Agent for trying to get info from Pac-Comm. It must be like trying to
- get blood out of a stone.
-
- Thanks Pac-Comm, no need to bother now I've done it myself!
-
- 73 de Dave G4WFQ @ GB7PET AUK.2404 19 Aug 90
-
- 0664 08/19 15:44 G4WFQ ALL TNC220 ON 9600 UO3
-