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Date:      Wed, 6 Sep 2000 20:41:02 -0500
From:      David Drum <david@mu.org>
To:        freebsd-questions@freebsd.org
Subject:   Any way to force IRQ probe?
Message-ID:  <20000906204102.C69172@elvis.mu.org>

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Hello everyone,

I have an older system (DEC PC XL 590) into which I have installed an
ISA serial port expansion card from Digital Research Technologies.
The motherboard is too old to be PnP; PCI irqs are set in the BIOS,
but there does not appear to be an equivalent option for the ISA slots.
The card is jumper configured to operate on IRQ 5 and 9 as GENERIC
indicates is typical for COM3 and COM4.  The kernel was rebuilt and
devices made as instructed in the Handbook (I've built lots of kernels
but have to create devices less often).  The ports do not work.

dmesg reports:
sio2: configured irq 5 not in bitmap of probed irqs 0
sio3: configured irq 9 not in bitmap of probed irqs 0

I read some of the related source code (src/isa/sio.c) but have not
uncovered any clues about how I might get FreeBSD to probe those irqs.
Can someone help me?

Regards,

David Drum
david@mu.org


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