Intel D2500CC motherboard and strange RS232/UART behavior

[John-Mark Gurney]

John Baldwin wrote this message on Wed, Apr 10, 2013 at 10:16 -0400:
> On Wednesday, April 10, 2013 3:04:15 am Poul-Henning Kamp wrote:
> > In message <1424327083.20130410103010 at serebryakov.spb.ru>, Lev Serebryakov 
> writ
> > es:
> > >Hello, Poul-Henning.
> > >You wrote 10 =E0=EF=F0=E5=EB=FF 2013 =E3., 0:52:04:
> > >
> > >>>  Problem is, that every uart device now is independent from each
> > >>>  other in good "OOP" style, and it looks like interrupt sharing we
> > >>>  need one interrupt handler per irq (not per device), which will now
> > >>>  about several UARTs. Something like "multiport" device, bot not
> > >>>  exactly.
> > >PHK> That is what the puc(4) driver does...
> > >  Yes, for PCI devices only :(
> > 
> > Yes, it needs to learn to do it from hints for ISA.
> 
> No, that is that not the right hammer for this.  This isn't a single ISA 
> device with two ports (which is what puc(4) is aimed at).

Don't you remeber the old AST 4 port cards?  Heck, even our handbook
talks about how to make those cards work:
https://www.freebsd.org/doc/en/books/faq/serial.html#enable-multiport-serial

I have a couple of these cards around somewhere I think...  Uses a DB-37
connector for the ports....

Though if these ports don't have the logic that the AST cards did to
share the IRQ, that'd make it hard...

The sio man page talks about this...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."