[comp.unix.xenix] Hacking a dumb serial card to get four ports for 386 Xenix

stever@tree.uucp (Steve Rudek) (12/27/89)

I captured a previous posting in which someone described how they modified
the kernel to add a 3rd serial port using a card configured as "com3" and
modifying the card so it used IRQ 5.  Well, what if neither IRQ 5 nor IRQ 7
are availale?   I have a two port serial card which I can configure as com3
and com4.  Can I hack it to use IRQ 10 and IRQ11 (for example) and install
it using the same basic kernel modification?

I'd be very grateful for an email response.  I've been trying to get
additional serial ports added for some time now.  I've even tried a couple
of multiport cards (including a Wyse 995) with no luck.
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{pacbell!sactoh0! OR ucdavis!csusac!}tree!stever