🚀 go-pugleaf

It's 12 Aug 97  10:34,
We'll return to mauried@commslab.gov.au and All's
discussion of Linux and Multiport Com cards.

 ma> I am after some general info about how Linux handles multiport Com
 ma> cards , by  multiport I mean 8 ports or more.
 ma> I have been given a 8 port card which I would like to get going under
 ma> Linux,but it isnt supported , although theres quite a deal of info on
 ma> how it  works in a dos environment,and example C drivers for dos.
 ma> (The card brand is Labtek and it has 4 uarts on board which allegedly
 ma> are 2 X  16550 per uart plus a 8088 like processor plus eprom.)
 ma> I guess the sort of thing I need to know is how Linux maps the base
 ma> addresses  of each of the uarts on the multiport card and how does it
 ma> handle the multiple  IRQs,or is there some standard for sharing a
 ma> single IRQ amongst multiple  interrupting devices.If theres any info
 ma> around which I could be pointed in the  right direction towards it sure
 ma> would help.

Sounds like you have a dumb multiport card.  Linux is likely to support
these by simply creating the device files (/dev/ttySx and /dev/cuax),
then using setserial to configure them to the correct I/O addresses and
IRQ (all would have the same IRQ).

You need to know what I/O ports the card is using and the IRQ (usually
only one), issue a few mknod statements to create the device files
(read the Serial How-To), then run setserial in your rc.serial (or
rc.local) to configure them. :-)

... Unathorized System Access. User Terminated.
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