Getting > than 4 serial ports working

["John Anderson" <jkanders@alpha.delta.edu>]

I've just added two more serial ports into my computer (for a total of
six).  I added support into the kernel for > than 4 serial ports.  I added
more ports with the MAKEDEV command, but I get the following message when
I try to access the 5th or 6th port:

kerr:~# statserial /dev/ttyS4
statserial: TIOCMGET failed: Input/output error

Any suggestions?

I tried connecting my modem to it with no response at all.  All serial
ports are using separate interrupts that are not conflicting to my
knowledge.

Note: please make sure you send your response to me, as I'm not currently
subscribed to this list.


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John Kerr Anderson
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