access@iuvax.UUCP (02/27/86)
In response to the request for the IBM AT serial pinout on the AT's original serial port: AT 25 DB 1 CD 8 2 RD 3 3 TD 2 4 DTR 20 5 SG 7 6 DSR 6 7 RTS 4 8 CTS 5 9 RI 22