[plug] Serial port fun

[John Breen]

On Sun, 29 Apr 2001, Mark Nold wrote:
> John,
> 
> You didn't happen to go to SBSH did you?
> 

yup, centuries ago.

> mn
> 
> 
> 
> 
> Mark Nold
> markn at enspace.com
> Senior Consultant
> 
> Change is inevitable, except from vending machines.
> 
> 
> 
> 
> On Sunday, 29 April 2001 10:01, John Breen [SMTP:wombat at redback.apana.org.au] 
> wrote:
> > On Sun, 29 Apr 2001, Kai wrote:
> > > ----- Original Message -----
> > > From: "John Breen" <wombat at redback.apana.org.au>
> > > To: <plug at plug.linux.org.au>
> > > Sent: Sunday, April 29, 2001 7:16 PM
> > > Subject: Re: [plug] Serial port fun
> > >
> > >
> > > > On Sun, 29 Apr 2001, Kai wrote:
> > > > > The 4 port serial card should've come with some doco, right?
> > > > Doco....
> > > >
> > > > That's that piece of paper, right?
> > >
> > > Yeah, the card should have come with some sort of documentation so you know
> > > how to configure it.
> >
> > Yup - I read it before I changed any jumper settings.  In fact it's sitting
> > here now and I've checked it.
> >
> > >
> > > > > More than likely need to run cat /proc/pci and see where the addresses
> > > are
> > > > > so you can get Linux to see the ports and use them.
> > > >
> > > > Oops, my fault - like many people it seems I didn't give enough details
> > > > in
> > > the
> > > > first place...
> > > >
> > > > It's a jumpered card (not Shrug 'n' Pray), and it's ISA.
> > >
> > > what about cat /proc/interrupts ?
> >
> > ah, that may be worth a look - when I set the machine up tomorrow :)
> >
> > Apart from IRQ15 being used by the IDE secondary controller, it looks right
> > though.
> >
> > >
> > > > We plugged in the card, did a kernel compile with extended serial 
> support,
> > > >
> > > (for
> > > > more than 4 ports) and rebooted.  No sign of the ports.  After much
> > > hunting
> > > > around, we did a mknod to get 4 devices to show up.  So far so hoopy.
> > > Then we
> > > > did setserial for each of the ports (like this)
> > > > # setserial /dev/ttyS4 irq 15 uart 16550
> > > > # setserial /dev/ttyS5 irq 12 uart 16550
> > > > # setserial /dev/ttyS6 irq 10 uart 16550
> > > > # setserial /dev/ttyS7 irq 9 uart 16550
> > >
> > > I think the card will have some sort documentation to show you how to
> > > configure it !
> >
> > as i said, yup - read it.  for each port, there's two jumpers.  one sets the
> > i/o address (or the COM port number).  the other sets the IRQ.
> >
> > >
> > > > now, ignoring the obvious IRQ conflicts here, that says that the first
> > > port is
> > > > COM4 with an IRQ of 14, the second COM5 with IRQ 12 and so on.  Am I
> > > right?
> > >
> > > Did you check in setserial (man setserial I think) for the commonly used
> > > IRQ's for existing processes?
> >
> > Ya, it just said don't use numbers other than 2(9), 3, 4, 5, 7, 9, 10, 11, 12
> > and 15.
> >
> > Still, I'll just keep muddling along with it.  Sometimes I hate jumpered
> > cards,
> > but I find they tend to be a little more trouble-free once they're working :)
> >
> >  --
> > Regards,
> >
> > John Breen
> >
> > +----------------------------------------------------+
> > | John Breen                                         |
> > | Contracting Delphi Developer                       |
> > +----------------------------------------------------+
> > | Ph (08) 9430-4003                                  |
> > | wombat at redback.apana.org.au - john at fairport.com.au |
> > +----------------------------------------------------+
> >
-- 
Regards,

John Breen

+----------------------------------------------------+
| John Breen                                         |
| Contracting Delphi Developer                       |
+----------------------------------------------------+
| Ph (08) 9430-4003                                  |
| wombat at redback.apana.org.au - john at fairport.com.au |
+----------------------------------------------------+