Very Computer

Hi,

Is anyone using both an internal and an external modem on their system?

I have an I/O card with the usual 4 ports (2 comm, 1 game, 1 lpt).  I
also have an internal 1440 kbaud fax/modem.  I have the internal modem set
to COM2, IRQ 5, port 0x2f8.  I set the first I/O card port to COM1, IRQ
4, port 0x3f8, and the second I/O card port to COM4, IRQ 3, port 0x2e8.
The mouse is on COM1, and it works just fine.  The internal modem is
working pretty good, too, on COM2.

My question is, is there some trick to using COM4?  I have an external 2400
baud modem, and tried plugging it in for an extra dial-in line (I have two
telephone lines).  I had the following in my inittab:

   d2:45:respawn:/sbin/agetty -mt60 38400,19200,9600,2400,1200 ttyS1
   d4:45:respawn:/sbin/agetty -mt60 38400,19200,9600,2400,1200 ttyS3

And the following in my rc.local:

   setserial /dev/cua1 port 0x2F8 irq 5
   setserial /dev/cua3 port 0x2E8 irq 3

When I tried talking to COM4 with kermit, my screen went blank.  All I
could do was dial into /dev/cua1 and reboot.  Before I rebooted, I looked at
my ps, and it seemed like kermit had spawned someone who had tried to run
X, or something.  I'm not sure.  I thought I would get someone's advice
before I tried it again.

Does anyone know anything about this configuration?  The internal modem
isn't somehow using the I/O card's uart, is it?  When I do setserial on
/dev/cua[0-3], I get this:

   /dev/cua0, UART: 16450, Port: 0x03f8, IRQ: 4    # mouse (I/O card port 1)
   /dev/cua1, UART: 16450, Port: 0x02f8, IRQ: 5    # internal modem
   /dev/cua2, UART: unknown, Port: 0x03e8, IRQ: 4  # unused
   /dev/cua3, UART: unknown, Port: 0x02e8, IRQ: 3  # 2nd serial port on I/O card

This doesn't make sense to me, since it looks like the mouse and the
internal modem both have the same type uart, but the system can't see the
serial card's second serial port's uart.  I couldn't find anything on the
internal modem card that looked like a uart, and I'm sure the two serial
ports on the I/O card sould have the same uart type.

I have checked and double-checked my configuration, and I'm certain that
the internal modem is setup as COM2, and the 2nd serial port on the I/O
card is setup as COM4, at least assuming there is no mistake in the
documentation.

thanks,
tw

Bingo.  I have ATI GUP.  I will re-configure my modems.  Never would have
found this in my system doc - there is none.  It's a custom system.
That's what I get for buying from some crazy Russians, I guess.  :)

tw

Another HW designer's practical joke on PeeCee-dom...  this one from IBM's
8514-ers  THen there's Soundblaster on IRQ7, everything from soup_to_nuts
on IO 0x300 (the "experimental adapter" address),  16-bit cards with no
high-IRQs,  partial address-decoding yielding cards that _need_ anywhere
from 4K-64K but will occupy anywhere from 16K-128K

These are obviously not just simple screw-ups, but a continuous, devious
program to ensure that the need for experienced screw-driver-warriors
will remain strong well into the next century... ;->  (no complaints here :)
kk