v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton) (03/13/91)
I'd like to make a null modem cable for a pair of PS/2 Model 30s. Can someone tell me how to go about doing this? Thanks Ken Morton v097pba8@ubvms.Bitnet v097pba8@ubvmsd.cc.buffalo.edu
bakke@plains.NoDak.edu (Jeffrey P. Bakke) (03/13/91)
In article <64734@eerie.acsu.Buffalo.EDU> v097pba8@ubvmsd.cc.buffalo.edu writes: > > I'd like to make a null modem cable for a pair of PS/2 Model 30s. > Can someone tell me how to go about doing this? > > Thanks Posted not to long ago on the net.... (Although, try connecting NCR Towers to Atlos 386 to Criterion with anything similar and you end up with garbage :-) --------------------------------------------------------------------- More than you even wanted to know about RS232 cables: DB9 RS232 Pin Signal 1 CD Carrier Detect 2 RxD Received Data 3 TxD Transmitted Data 4 DTR Data Terminal Ready 5 SGnd Signal Ground 6 DSR Data Set Ready 7 RTS Request to Send 8 CTS Clear To Send 9 RI Ring Indicator DB25 RS232 Pin Signal 1 CGnd Case Ground 2 TxD 3 RxD 4 RTS 5 CTS 6 DSR 7 SGnd 8 CD 9-19 Not usually used 20 DTR 21-25 Not usually used RS232C Null-Modem Cable DB9 DB25 DB25 DB9 Pin Pin Pin Pin 1 8 CD DTR 20 4 2 3 RxD TxD 2 3 3 2 TxD RxD 3 2 4 20 DTR DSR 6 6 4 20 DTR CD 8 1 5 7 SGnd SGnd 7 5 6 6 DSR DTR 20 4 7 4 RTS CTS 5 8 8 5 CTS RTS 4 7 9 RI 1-6 6-8 6-8 1-6 <- Jumpers Note: If for some reason, you cannot jumper DSR to CD, connect DSR to the opposite DTR, and connect CD straight across (if possible). -- _ Kevin D. Quitt demott!kdq kdq@demott.com DeMott Electronics Co. 14707 Keswick St. Van Nuys, CA 91405-1266 VOICE (818) 988-4975 FAX (818) 997-1190 MODEM (818) 997-4496 PEP last ------------------------------------------------------------------------- -- Jeffrey P. Bakke bakke@plains.NoDak.edu (...other idiot methods...) UUCP : ...!uunet!plains!bakke BITNET : bakke@plains.bitnet