Date: Thu, 21 Feb 2002 10:51:00 +0800 From: Raymond <[EMAIL PROTECTED]> Subject: Re: [LIB] Some answers please?
At 06:35 PM 20/02/2002 -0800, you wrote: >Date: Wed, 20 Feb 2002 21:28:14 -0500 >From: David VanHorn <[EMAIL PROTECTED]> >Subject: Re: [LIB] Some answers please? > > >> >>Don't count on it ... ref what I said about only Tx and Rx being available ... I >don't like the chances of your serial cellphone working for instance as it'd probably >also require the CD/RI lines. Unless the Actisys comes with a driver to reconstruct >these lines (in which case you'd take a speed hit) all it'd be doing is what I >mentioned in my essay earlier on. > >That is part and parcel of the IRDA link. >Also, speed may be as low as 9600, but can be as fast as 115200 on the IR. >The devices negotiate this as they establish the link. >So, any speed hit is likely to be academic. > >Note that the IR speed is independent of the serial speed, and will go to the fastest >value both devices can support. I was more talking the fact that if it did multiplex the DTR/DSR, RTS/CTS and CD/RI lines onto the TX/RX lines in software (and the IrDA dongle on the other end reconstructed them) you'd not be able to hit 115200 and you'd experience a significantly higher processor overhead as the processor now has to do what the serial driver chip would have done ... if the things were designed to permit IrDA printing though I doubt this would be done because as I said, all printers really need is TX/RX (and software flow control). Oh and yes proper IrDA devices negotiate the link speed based on conditions but remember, we're trying to trick non-IrDA devices to link into IrDA ... unfortunately not many standard serial devices will autonegotiate a speed. - Raymond --- /~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\ | | "Does fuzzy logic tickle?" | | ___ | "My HDD has no reverse. How do I backup?" | | /__/ +-------------------------------------------| | / \ a y b o t | [EMAIL PROTECTED] | | | HTTP://www.raybot.net | | ICQ: 31756092 | Need help? Visit #Windows98 on DALNet! | \~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~/ ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://libretto.basiclink.com/archive - Archives http://www.picante.com/~gtaylor/portable/faq.html - FAQ -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
