Author: Keith Ian Price
Date: 13:36:28 08/07/02
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On August 07, 2002 at 12:47:19, Harald Faber wrote: >On August 07, 2002 at 12:22:17, Thorsten Czub wrote: > >>On August 07, 2002 at 08:11:23, James T. Walker wrote: >> >>>http://www.lammertbies.nl/comm/info/RS-232_null_modem.html >> >>very good . the only thing we need to know NOW is how the pins >>for the WORKING auto232 cable are conncected. has nobody such an instrument >>to measure it ? > >Sure. :-) >From my memory: It is the "Simple null modem without handshaking". Pin 5 normal >connected (ground or vcc, s.th. like that), and the most important is that the >pins 2&3 are crossed: >Pin 2 from the first plug leads to Pin 3 in the second plug and Pin 3 from the >first plug leads to Pin 2 in the second plug. >That is the "secret"... That is for 9-pin to 9-pin only. For 25 pin to 25 pin 2-3 3-2 7-7. For 9-pin to 25-pin 2-2 3-3 5-7. That should cover it all. kp
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