Gerben.Wierda@samba.acs.unc.edu (Gerben Wierda) (03/26/91)
REPLIES TO: gerben@rug.nl (please) My modem and my terminal have an RS-232 (unbalanced) connector. The NeXT has an RS-422-A (?) (balanced). Which pins should I connect? (Both for NeXT-Terminal and NeXT-modem?) Is there an apple cable I can use? Thanks in advance, Gerben -- ============================================================================= Extended Bulletin Board Service, Research & Development Office of Information Technology, University of North Carolina at Chapel Hill internet: bbs.acs.unc.edu or 128.109.157.30
kls30@duts.ccc.amdahl.com (Kent L Shephard) (03/27/91)
In article <3101@beguine.UUCP> Gerben.Wierda@samba.acs.unc.edu (Gerben Wierda) writes: >REPLIES TO: gerben@rug.nl (please) > >My modem and my terminal have an RS-232 (unbalanced) connector. The NeXT >has an RS-422-A (?) (balanced). Which pins should I connect? (Both for >NeXT-Terminal and NeXT-modem?) Look at the man page for zs. It will have the info you need. This is assuming you have the man pages. I have my IBM PC (clone) connected to my cube with a null modem cable. File transfers work flawlessly. > >Is there an apple cable I can use? I don't know this one. I made my cable myself. Cost was about $5. If you don't have the man pages I'll mail you the connections you need or post. I just don't have them handy right now. > >Thanks in advance, > >Gerben >-- >============================================================================= > Extended Bulletin Board Service, Research & Development >Office of Information Technology, University of North Carolina at Chapel Hill > internet: bbs.acs.unc.edu or 128.109.157.30 -- /* -The opinions expressed are my own, not my employers. */ /* For I can only express my own opinions. */ /* */ /* Kent L. Shephard : email - kls30@DUTS.ccc.amdahl.com */
hardy@golem.ps.uci.edu (Meinhard E. Mayer (Hardy)) (03/27/91)
Macintosh modem cable works fine; the printer cable has some connections missing, but works most of the time; I made one, accoding to the manual (null-modem) and it works with a LaserjetIIP Hardy -------****------- Meinhard E. Mayer (Prof.) Department of Physics, University of California Irvine CA 92717;(714) 856 5543; hardy@golem.ps.uci.edu or MMAYER@UCI.BITNET
amm@NeXT.COM (Alan M. Marcum) (03/28/91)
Hardy writes, in response to Gerben Wierda's question about cables: > Macintosh modem cable works fine; the printer cable has some > connections missing, but works most of the time; I made one, > accoding to the manual (null-modem) and it works with a LaserjetIIP Please, if you don't REALLY understand what you're doing, do NOT use a Macintosh modem cable. Some Mac-Modem cables might work fine with some modems and some models of NeXT computers, but there is far too much variability in Mac-Modem cables for me to recommend them. I've seen SIX different configurations of cables all called "Mac-Modem" cables; all but one of these simply did not work for dial-in and dial-out on the same port, and the other one worked only with some modems. In some instances some Mac-Modem cables will work for dial-out. But it's really easier to buy or build a cable to our wiring specifications than it is to diagnose why your modem set-up isn't working the way it should. As Kent Shephard noted, the cable wiring specs are documented in the zs(4) UNIX Manual Page. Please note that the hard-copy version of the zs man page is INCORRECT in the printed NeXT Network and System Administration manual for 2.0: it's the 1.0 version of zs(4), not the 2.0 version, and so doesn't cover the 68040's serial ports. In addition, no Mac-Modem cable I've ever seen is wired correctly for an 040-based NeXT's hardware flow control. I understand that serial cables built to our specs are available from NeXTconnection [800-800-NeXT]. -- Alan M. Marcum NeXT Technical Support amm@NeXT.COM
hardy@golem.ps.uci.edu (Meinhard E. Mayer (Hardy)) (03/28/91)
Sorry -- I used one particular mac-modem cable for dialout and it worked with my Intel 2440 baud modem. I have not tried dialin, and that may well not work. As a good theoretical physicist I used mathematical induction from 1 to n! I diagnosed that the printer cable was miswired (for the NeXT, so I built one for the LaserJetIIP). I still have some problem printing huge files, but this is probably a printcap problem and not a cable problem, which I will get to sooner or later (I am hoping against hope that it will disappear when I upgrade to 2.1). One criticism though: if the printed manual page is wrong, and some people don't have manual pages on line (I do, that's where I got the cabling diagram), how is a poor student to know what cable to use? Couldn't NeXT just include a modem cable ( about $5 wholesale), preferably BLACK, and thus save lots of people lots of headaches? Hardy -------****------- Meinhard E. Mayer (Prof.) Department of Physics, University of California Irvine CA 92717;(714) 856 5543; hardy@golem.ps.uci.edu or MMAYER@UCI.BITNET
garnett@cs.utexas.edu (John William Garnett) (03/30/91)
In article <HARDY.91Mar27140328@golem.ps.uci.edu> hardy@golem.ps.uci.edu (Meinhard E. Mayer (Hardy)) writes: > >Couldn't NeXT just include a modem cable ( about $5 wholesale), >preferably BLACK, and thus save lots of people lots of headaches? > >Hardy Regardless of how much this would please me, someone else wouldn't like it (because they might not plan on using a modem with his/her NeXT). However, NeXT could certainly sell modem cables that would work with the NeXT. Even if they sold them at the same markup as they sell memory (~ 200% to 300%) it would be worth it to know one was getting a cable that would work. I have never understood the marketing motivations of major computer manufacturers (by the way, IBM doesn't sell cables either). -- John Garnett University of Texas at Austin garnett@cs.utexas.edu Department of Computer Science Austin, Texas