[H-GEN] Spurious 8259A interrupt

Robert Brockway robert at timetraveller.org
Thu Aug 23 03:35:51 EDT 2001


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On 23 Aug 2001, Christopher Biggs wrote:

> If it's an internal (possibly "plug-and-pray") modem which appears as
> a third (or subsequent) serial port, it may be connecting itself to
> IRQ 7, in which case you'd need to use the setserial(8) utility at

Ooh, that's evil :)  Just typical though :)  Traditionally irq 2 & 5 tend
to go to the 3rd & 4th serial devices but these days why not just rip off
irq 7 :)

> boot-time to tell the kernel that there's a nonstandard serial port,
> using a nonstandard IRQ.

Or irq could be locked out as 'legacy ISA' in the BIOS, to give it back to
the printer (if it needs it).
Rob

-- Robert Brockway B.Sc. email: robert at timetraveller.org  ICQ: 104781119
   Linux counter project ID #16440 (http://www.li.org)
   blake: up 10 days, 16:15,  6 users,  load average: 1.00, 1.00, 1.00
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