Limit of bus hierarchies (was Re: PCI modems do not work???)

[Andrew Reilly]

On Mon, 06 Sep 1999, Warner Losh wrote:
> : http://www.infoworld.com/cgi-bin/displayStory.pl?99093.piusb.htm
> :
> : Hmm.  What sort of level of nesting do we support for this sort
> : of thing?  It's probably possible to buy USB interface cards
> : that plug into ISA, PCI, SCSI?  And vice-versa?
> 
> USB doesn't present a 16550A interface to the host, so I don't think
> that sio would have a USB attachment.

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...

--
Andrew


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