Date: Fri, 20 Feb 1998 01:32:35 +0100 (CET) From: "Soren S. Jorvang" <soren@t.dk> To: Nate Williams <nate@mt.sri.com> Cc: Louie <louie@sunra.csci.unt.edu>, freebsd-mobile@FreeBSD.ORG Subject: Re: Libretto 70CT problems Message-ID: <Pine.NEB.3.96.980220012108.4605B-100000@gnyf.int.tele.dk> In-Reply-To: <199802200018.RAA10636@mt.sri.com>
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On Thu, 19 Feb 1998, Nate Williams wrote: > > 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. Well, NetBSD (both sides) of course :-) Nothing tricky like running DOS thingys beforehand. I assume FreeBSD will be the same, modulo any sio/com differences. > > $ 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. Yes, it is half-duplex. I too anticipate poor performance as a result. Apparently, there is a 'radiod', or something, for Linux that speaks kind words to half-duplex links. First, I wan't to try running the small box diskless to see if it is powerful enough to be interesting. If it is, I will buy a compact flash disk for it, removing the need to ethernet, making IrDA very, very interesting. It not, I am going to make it a wireless X terminal, same thing with IrDA. At that point, I will probably try a hack to pppd. -- Soren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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