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Date:      Fri, 20 Feb 1998 01:11:28 +0100 (CET)
From:      "Soren S. Jorvang" <soren@t.dk>
To:        Lourie <louie@sunra.csci.unt.edu>
Cc:        nate@mt.sri.com, freebsd-mobile@FreeBSD.ORG
Subject:   Re: Libretto 70CT problems
Message-ID:  <Pine.NEB.3.96.980219091338.664A-100000@gnyf.int.tele.dk>

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[I'm not on freebsd-mobile]

Louie wrote:

> > 3) What's involved in getting the IrDA port to work?  (I haven't
> > tried yet.)  Does it just look like another serial port or is there
> > more to it?

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.

$ 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.

Nate wrote:

> There's more to it.  Apparently it doesn't 'just work', and requires
> non-existant patches to have it do anything useful.

(At least) if the port is a 115K2bps version, it should be able to look
like a 16550 for running serial-over-IrDa.


-- 
Soren


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