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000112_fdc@watsun.cc.columbia.edu_Thu May 10 12:59:57 EDT 2001.msg
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Article: 12403 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!watsun.cc.columbia.edu!fdc
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc,comp.unix.programmer
Subject: Re: Need help with Mac OS X 10.0.2
Date: 9 May 2001 18:02:36 GMT
Organization: Columbia University
Lines: 26
Message-ID: <9dc0ns$bbb$1@newsmaster.cc.columbia.edu>
References: <9d9395$rt3@watsun.cc.columbia.edu> <9dbmos$kke$1@jake.esu.edu> <9dbo3h$2ve$1@newsmaster.cc.columbia.edu>
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Xref: newsmaster.cc.columbia.edu comp.protocols.kermit.misc:12403 comp.unix.programmer:128465
In article <9dbo3h$2ve$1@newsmaster.cc.columbia.edu>,
Frank da Cruz <fdc@watsun.cc.columbia.edu> wrote:
: In article <9dbmos$kke$1@jake.esu.edu>,
: David H. Hutchens <hutchens@cs.millersville.edu> wrote:
: : I've done further investigation.
: : ...
: :
: The only way to solve this is to have somebody who knows something about
: Mac OS X internals sit down and "try this, try that" with the source code:
:
: . Are we using the right API for modem control and hardware flow control?
: Note that many UNIX-based OS's maintain scads of APIs for "compatibility",
: but some of them might be nonfunctional.
:
I forgot to mention... I don't have much to do with Macintoshes any more,
at least not in person, but I wonder if the pseudo-serial-port to which
your internal modem is connected is an RS-232 device? Macintoshes used to
use RS-422, which is completely different. It does not have modem signals
at all, which would certainly explain a thing or two in this case.
Maybe Mac OS X has an entirely different and unique API for accessing the
*modem* (as opposed to the "serial port", which isn't really there). This
sort of thing is not unkown; for example, it is done in Windows. It used
to be done even in UNIX System V R3, for the AT&T UNIX PC.
- Frank