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Date:      Thu, 19 Feb 1998 17:18:43 -0700
From:      Nate Williams <nate@mt.sri.com>
To:        "Soren S. Jorvang" <soren@t.dk>
Cc:        Lourie <louie@sunra.csci.unt.edu>, nate@mt.sri.com, freebsd-mobile@FreeBSD.ORG
Subject:   Re: Libretto 70CT problems
Message-ID:  <199802200018.RAA10636@mt.sri.com>
In-Reply-To: <Pine.NEB.3.96.980219091338.664A-100000@gnyf.int.tele.dk>
References:  <Pine.NEB.3.96.980219091338.664A-100000@gnyf.int.tele.dk>

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> I just bought an IBM PC110 and a serial port IrDA transceiver for another
> system.
> 
> With the only useful built-in ports being a 2400 bps modem and the IrDA
> interface, getting it to work for bootstrapping the box seemed like a good
> idea :-)
> 
> I left both serial ports at their defaults, "normal serial port mode", ie.
> not 'IrDA mode'.
> 
> Serial-over-IrDA is 8N1, with no carrier signal other than the data itself.

Are you using FreeBSD, or Windows?  If the latter, then it *will* work
because Windows has a special driver.

> $ grep softcar /etc/ttys
> tty01	"/usr/libexec/getty 115200np"	vt340	on softcar
> $ grep 115200np /etc/gettytab
> 115200np::np:sp#115200:
> 
> I do intend to run PPP over the link once I get a proper system installed
> on the portable, to get compression and CRC. The link is very reliable when
> the transceivers are within range of eachother, but at the edge of the
> effective range, data gets transformed to complete garbage.

Interesting.  As I understand it, the Ir stuff isn't Full-duplex, and
all of the serial TCP/IP protocols assume a full-duplex line.


Nate

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