Date: Tue, 07 Oct 1997 08:00:31 +0900 From: itojun@itojun.org To: Warner Losh <imp@village.org> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: IrDA Message-ID: <8048.876178831@coconut.itojun.org> In-Reply-To: imp's message of Mon, 06 Oct 1997 11:27:59 CST. <199710061727.LAA14616@harmony.village.org>
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>I'm looking at getting a portable Dell which claims to have IrDA. I >also just got a Halted catalog that has an ISA IrDA card from IBM. >Would I be nuts to expect these two things to talk to one another? Is >there anything magical about IrDA, or can I just run SLIP/PPP over >them like any other serial port? Also, if I'm running Win95, can I >run PPP over IrDA? If I read things, it is just a serial port, right? >The ISA IrDA card is for my FreeBSD box, so I'd need to know what >support is present there for IrDA. IrDA is made up from very huge amount of code. InfraRed serial port on your Dell can be understood as half-duplex serial line. The point is, if A sends bytestream while B is sending something, bytestream will be smashed. To make it look like a standard serial line, IrDA implements serial line emulation protocol over (connection oriented protocol over (packet based protocol over (half-duplex serial line))). serial line emulation protocol connection oriented protocol packet based protocol half-duplex serial line hardware We (colleagues and me) thought about how to implement this several times, but we felt amount of code > amount of benefit, so we haven't started. You can grab specifications as PDF files, from www.irda.org. itojun
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