Installing PCI modem in machine with 4 serial ports (HELP!)

[fbsd_user]

To start with you are very light with details about your
environment, like what version of FBSD you are running and when you
say the modem works, you failed to say if it worked in an FBSD
system or MS/Windows system.

For your info many of the PCI modems on the market are manufactured
specially for MS/windows and are missing the onboard controller. The
controller function is performed by the modem driver you have to
load into MS/windows. If you have one of those winmodems but it back
in your windows box where it belongs.

Lets assume your modem has the onboard controller.
Have you reviewed the boot log  /var/run/dmesg.boot file?
It may be found as (unknown) in that case it may be an winmodem for
sure, or you have installed FBSD on an pre Y2K PC and it's bio's are
giving FBSD problems.
Adding  device puc  to your kernel source and recompiling your
kernel will fix this problem.

The other condition is the your modem is found at boot time and is
moved to sio4 which is really com5 which in not defined in the 4.x
versions of FBSD.

  sio0: <Zoom PCI Modem> port
0xe400-0xe407,0xe000-0xe0ff,0xdc00-0xdcff mem 0xe2000000-
  sio0: moving to sio4
  sio4: type 16550A

   Sio4 is internal device cuaa4.
   For some unknown reason this device is not in the device table
for 4.x versions
   You have to create it manually by doing the following commands.

  cd /dev
  ls -l /dev/cuaa4            shows as not found
  sh MAKEDEV cuaa4            run script to make the device.
MAKEDEV must be in caps.
  ls -l /dev/cuaa4            now shows it's there

	Device cuaa4 is the device you tell user ppp to use to connect with
your PIC modem.

If you are running 5.x version of FBSD then you do not have to
makedev it auto in 5.x.

-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Philip
Hallstrom
Sent: Monday, January 05, 2004 1:03 PM
To: questions at freebsd.org
Subject: Installing PCI modem in machine with 4 serial ports (HELP!)

Hi -
        I've got a little computer that has four serial ports
built-in to
the motherboard.  I want to add a PCI modem (USR 5610B) and am
having a
devil of a time.  I know this modem works since I've used it (well,
another one just like it) in another machine no problem.

Here's the computer's board:
http://www.orbitmicro.com/products/embedded%20boards/via/EBC-569.htm

The last time I did this it just worked.  However, this bit from the
Handbook has me concerned:

--------------------------------------------------------------------
---
These are the four serial ports referred to as COM1 through COM4 in
the
MS-DOS/Windows world.

    Note: If you have an internal modem on COM4 and a serial port at
COM2,
you will have to change the IRQ of the modem to 2 (for obscure
technical
reasons, IRQ2 = IRQ 9) in order to access it from FreeBSD. If you
have a
multiport serial card, check the manual page for sio(4) for more
information on the proper values for these lines. Some video cards
(notably those based on S3 chips) use IO addresses in the form of
0x*2e8,
and since many cheap serial cards do not fully decode the 16-bit IO
address space, they clash with these cards making the COM4 port
practically unavailable.

    Each serial port is required to have a unique IRQ (unless you
are
using one of the multiport cards where shared interrupts are
supported),
so the default IRQs for COM3 and COM4 cannot be used.
--------------------------------------------------------------------
---

I rarely use modems, and am even less proficient at messing around
with
IRQ stuff.  What I'm concerned about is that it seems to say you can
only
have 4 serial ports (COM1 -> COM4) total... which means I'm kind of
screwed.

I've tried disabling all of the serial ports via the BIOS, but it
doesn't
help...

If anyone out there has any light to shed on how to get this working
I'd
appreciate it.

Thanks!

-philip
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