Date: Sun, 05 Sep 1999 23:41:29 -0600 From: Warner Losh <imp@village.org> To: Andrew Reilly <A.Reilly@lake.com.au> Cc: hackers@FreeBSD.ORG Subject: Re: Limit of bus hierarchies (was Re: PCI modems do not work???) Message-ID: <199909060541.XAA03034@harmony.village.org> In-Reply-To: Your message of "Mon, 06 Sep 1999 15:23:38 %2B1000." <9909061532290G.69570@gurney.reilly.home> References: <9909061532290G.69570@gurney.reilly.home> <199909060517.XAA02790@harmony.village.org>
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In message <9909061532290G.69570@gurney.reilly.home> Andrew Reilly writes: : So there's going to be manufacturer-specific terminal/serial port drivers : to talk to the serial ports on USB-attached laptop docking stations, like : the Annex ethernet terminal server things? I guess in the Windows world : they must provide 16550-virtualisation software, or else everyone's copy of : Telix or TeraTerm won't work. Or the parallel ports vs parallel-port : scanners. Or maybe these docking stations just won't work at all... No. The Windows world presents a standard SERIAL DRIVER interface, at least that's the theory that is preached. I see no reason why a USB serial port wouldn't do the same. USB defines a serial port interface, IIRC, which is the same across manufacturers (in theory) which would be handled by a single USB driver in our USB stack. Likewise with parallel ports. Although turning a USB parallel port into a bit twiddling interface may present some interesting challanges. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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