Path: utzoo!utgpu!water!watmath!clyde!rutgers!ucsd!ucbvax!SIMTEL20.ARPA!WANCHO
From: WANCHO@SIMTEL20.ARPA ("Frank J. Wancho")
Newsgroups: comp.sys.zenith.z100
Subject: DB9-DB25 cross-connects
Message-ID: <WANCHO.12371426117.BABYL@SIMTEL20.ARPA>
Date: 2 Feb 88 05:53:00 GMT
References: <malpass.at.ll-vlsi.arpa>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 19

THe following is the contents of the single file, SERIAL.AT, in
PD1:<MSDOS.MODEM>DB9-DB25.ARC:

		 A p p l i c a t i o n	   N O T E

Following  is a schematic diagram for the construction of a cable
which connects the PC/AT's 9-pin serial I/O port to devices using
a standard DB-25-pin connector:

	  AT Serial	     Name	      DB-25 connector
	       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