Path: utzoo!utgpu!watserv1!watmath!att!tut.cis.ohio-state.edu!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!hp-pcd!hp-vcd!miked From: miked@hp-vcd.HP.COM (Mike Dobbs) Newsgroups: comp.sys.hp Subject: Re: RS232 Pinout on HP110 Message-ID: <1220003@hp-vcd.HP.COM> Date: 11 Sep 90 18:46:03 GMT References: <1990Sep11.065103.22106@portia.Stanford.EDU> Organization: Hewlett Packard, Vancouver, WA Lines: 28 The hp 110 pin out corresponds to the DB25 pin out wherever possible. It was defined before IBM introduced their 9 pin serial which explains why they are different. 1 DTR 2 TxD 3 RxD 4 RTS 5 CTS 6 DSR 7 Ground 8 RLSD (carrier detect) 9 Ring Detect HP sells cables for the 110. HP 92221M ...... modem cable DTE to DCE HP 92221P ...... printer cable DTE to DTE (wired with nul-modem) -- Mike Dobbs (206) 896-2696 ___ Hewlett-Packard Co. / / Vancouver Division (R&D Lab) / / P.O. Box 8906 / /______ __________ Vancouver, WA 98668-8906 / ____ / / ___ / HPDesk: Mike Dobbs/HP5400/AL / / / / / /___ / / Internet: miked@vcd.hp.com /__/ /__/ / ______/ / / /__/