X-NEWS: eisner comp.sys.dec: 4599 Relay-Version: VMS News - V6.1 30/1/93 VAX/VMS V5.5-2; site eisner.decus.org Path: eisner.decus.org!noc.near.net!howland.reston.ans.net!agate!dog.ee.lbl.gov!csesun.ee.lbl.gov!peterc Newsgroups: comp.sys.dec Subject: Re: MMJ pinout Message-ID: <32290@dog.ee.lbl.gov> From: peterc@csesun.ee.lbl.gov (Peter Cull) Date: 13 Jul 1993 09:23:26 GMT Reply-To: peterc@csesun.ee.lbl.gov (Peter Cull) References: <21tlr3$g4i@news.acns.nwu.edu> Distribution: na Organization: Lawrence Berkeley Laboratory NNTP-Posting-Host: 128.3.112.72 Lines: 35 In article <21tlr3$g4i@news.acns.nwu.edu> jweiss@casbah.acns.nwu.edu (Jerry Weiss) writes: >Does someone have the cable pinout of the DEC MMJ connectors installed >on host computers. We'd like to make own cables and have obtained the >correct crimper and connectors. I cannot find any documentation on >the signal pinouts. > >Thanks > >-- >Jerry S. Weiss >j-weiss@nwu.edu >Dept. Medicine, Northwestern Univ. Medical School, Chicago, Illinois >%SYSTEM-S-PHALOKTARG, Phasers Locked on Target, Ready to Fire I'll bet we make this an addition to the FAQ soon: Pin Signal 1 Data Terminal Ready (DTR) 2 Transmit Data 3 Ground (Ref to Xmt Data) 4 Ground (Ref to Rcv Data) 5 Receive Data 6 Data Set Ready (DSR) Do you see a pattern here? A loopback connector that DEC has is connected: 1<>6, 2<>5, and 3<>4. The signals are said to be DEC423 which might be thought of as RS-423 and possibly an out-growth of RS-232-x. Pete ------------------------------------------------------------------------------ Peter (Pete) T. Cull INTERNET: PTCull@lbl.gov Lawrence Berkeley Laboratory Vox: +1 510 486 7554 Fax: +1 510 486 5467 My opinions are mine and not those of the U.S. Dept. Of Energy nor UC Berkeley ------------------------------------------------------------------------------