Intel D2500CC motherboard and strange RS232/UART behavior

[John Baldwin]

On Sunday, April 07, 2013 5:46:34 pm Adrian Chadd wrote:
> On 7 April 2013 13:15, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> > In message <1428566376.20130407234355 at serebryakov.spb.ru>, Lev Serebryakov 
writ
> > es:
> >
> >>It  doesn't  look  so.  And  uart1  and  uart3  doesn't have interrupt
> >>according to `vmstat -i' (but share irq4 according to boot messages).
> >
> > Ohh, there you go...
> >
> > Interrupt sharing on ISA requires special magic...
> 
> .. did we really break shared interrupt handling on ISA?

When did it ever work?
 
> God, you made me remember ISA interrupt sharing. I thought the main
> source of evilness is edge shared interrupts?

Right, and ISA are edge and active-hi, so generally not shareable.

Lev,

Can you assign different interrupts via the BIOS somehow?

-- 
John Baldwin