help with ISA PnP modem

help with ISA PnP modem

Post by ROBERT N » Thu, 27 Sep 2001 05:13:44



hi,
i am having problems with getting a zoom faxmodem working.  it is a isa pnp
internal modem tied to com1 (int 4 io address 3f8).  i have run pnpdump -c
to generate a /etc/isapnp.conf file.  after i run isapnp, error messages
indicate that i have a resource conflict at the IO address of 3f8 which i
have not yet found to be the case.

i even cat /proc/interrupts and /proc/ioports and do not see anything
unusual.

i would appreciate any help in this area, as it would be nice to connect to
the outside world using linux, instead of win98 :-).

thanks,
rob

 
 
 

help with ISA PnP modem

Post by David Efflan » Thu, 27 Sep 2001 11:00:27



Quote:> hi,
> i am having problems with getting a zoom faxmodem working.  it is a isa pnp
> internal modem tied to com1 (int 4 io address 3f8).  i have run pnpdump -c
> to generate a /etc/isapnp.conf file.  after i run isapnp, error messages
> indicate that i have a resource conflict at the IO address of 3f8 which i
> have not yet found to be the case.

Whenever you have questions, you should state which Linux distro, kernel
version and model of hardware you are having trouble with.  I am currently
online with an old Zoom 2819 ISA PnP fax/modem originally K56flex, flashed
to V.90 running SuSE 7.1 w/generic kernel 2.4.9.

Originally I tried hard jumpering the modem, but Win95 used different irq
anyway, so I simply used a setserial command to use the Win95 irq without
using isapnp.conf.  Eventually I jumpered it for Pnp and used isapnp.conf.

However, with this distro and 2.4.x kernels, I specifically compile the
kernel without any PnP support (otherwise it uses an irq that conflicts
with my ISA soundchip), I don't use isapnp.conf (or I get an error like
yours), and it simply works.  Maybe the BIOS automatically sets it based
on Windows settings.

Quote:> i even cat /proc/interrupts and /proc/ioports and do not see anything
> unusual.

Do the serial ports in /proc/ioports say serial(auto)?  Doesn't your
motherboard have a Com1?

See what dmesg or /var/log/messages (or SuSE has a boot.msg log) shows for
serial ports.  Does it show a 16550A UART for all serial ports if finds?  
Linux apparently assigns my modem to ttyS03 (/dev/ttyS3) using port 0x02e8
(irq = 3), and the proper UART shows up, which means it should work as is.

Quote:> i would appreciate any help in this area, as it would be nice to connect to
> the outside world using linux, instead of win98 :-).

What port and irq does Win98 say it is using.

--
David Efflandt - All spam is ignored - http://www.de-srv.com/
http://www.autox.chicago.il.us/  http://www.berniesfloral.net/
http://cgi-help.virtualave.net/  http://hammer.prohosting.com/~cgi-wiz/

 
 
 

help with ISA PnP modem

Post by ROBERT N » Thu, 27 Sep 2001 12:43:38


Marc,
Thanks for your response.  I do have 2 on-board serial ports and it looks
like something was messed up with my BIOS settings.  I now have com1, com2
ok.  my modem is showing up as com3 now.

I'm going to get back into Linux and try to see if I can get things moving
with the current changes.  If I'm not successful, I'll come back to this
thread.  Thanks again.

Rob



> > i am having problems with getting a zoom faxmodem working.  it is a isa
pnp
> > internal modem tied to com1 (int 4 io address 3f8).  i have run
pnpdump -c
> > to generate a /etc/isapnp.conf file.  after i run isapnp, error messages
> > indicate that i have a resource conflict at the IO address of 3f8 which
i
> > have not yet found to be the case.

> If it's on io 0x3f8, this means that the on-board serial ports have
> been moved away or disabled completely.  Is that correct?  It's not
> enough not to use them; there must not *be* anything at that address.

> > i even cat /proc/interrupts and /proc/ioports and do not see anything
> > unusual.

> These will only show active devices, not those that may be trying to
> use the same address space.

 
 
 

help with ISA PnP modem

Post by ROBERT N » Thu, 27 Sep 2001 12:49:54


Thanks David for your help.

I installed SuSE 6.2, kernel 2.2.10.  Modem is Zoom 2919 ISA PnP fax/modem
w/V.90.

I appear to have some problems with my serial port configs at the BIOS level
which I corrected and will give it another try in linux.  I now have the
modem showing up as com3, int 10, io address ranges 3E8-3EF and 108-10F.

I'll see how far I get ...

Thanks again,
Rob



> > hi,
> > i am having problems with getting a zoom faxmodem working.  it is a isa
pnp
> > internal modem tied to com1 (int 4 io address 3f8).  i have run
pnpdump -c
> > to generate a /etc/isapnp.conf file.  after i run isapnp, error messages
> > indicate that i have a resource conflict at the IO address of 3f8 which
i
> > have not yet found to be the case.

> Whenever you have questions, you should state which Linux distro, kernel
> version and model of hardware you are having trouble with.  I am currently
> online with an old Zoom 2819 ISA PnP fax/modem originally K56flex, flashed
> to V.90 running SuSE 7.1 w/generic kernel 2.4.9.

> Originally I tried hard jumpering the modem, but Win95 used different irq
> anyway, so I simply used a setserial command to use the Win95 irq without
> using isapnp.conf.  Eventually I jumpered it for Pnp and used isapnp.conf.

> However, with this distro and 2.4.x kernels, I specifically compile the
> kernel without any PnP support (otherwise it uses an irq that conflicts
> with my ISA soundchip), I don't use isapnp.conf (or I get an error like
> yours), and it simply works.  Maybe the BIOS automatically sets it based
> on Windows settings.

> > i even cat /proc/interrupts and /proc/ioports and do not see anything
> > unusual.

> Do the serial ports in /proc/ioports say serial(auto)?  Doesn't your
> motherboard have a Com1?

> See what dmesg or /var/log/messages (or SuSE has a boot.msg log) shows for
> serial ports.  Does it show a 16550A UART for all serial ports if finds?
> Linux apparently assigns my modem to ttyS03 (/dev/ttyS3) using port 0x02e8
> (irq = 3), and the proper UART shows up, which means it should work as is.

> > i would appreciate any help in this area, as it would be nice to connect
to
> > the outside world using linux, instead of win98 :-).

> What port and irq does Win98 say it is using.

> --
> David Efflandt - All spam is ignored - http://www.de-srv.com/
> http://www.autox.chicago.il.us/  http://www.berniesfloral.net/
> http://cgi-help.virtualave.net/  http://hammer.prohosting.com/~cgi-wiz/

 
 
 

help with ISA PnP modem

Post by Steve Marti » Thu, 27 Sep 2001 19:31:26



> Marc,
> Thanks for your response.  I do have 2 on-board serial ports and it looks
> like something was messed up with my BIOS settings.  I now have com1, com2
> ok.  my modem is showing up as com3 now.

I saw from your earlier post in this thread that the modem now
uses IRQ 10. If this is true, you'll probably want to issue
the command

   setserial /dev/ttyS2 irq 10

after using isapnp but before trying to use the modem.
I'm doing that here (using IRQ 9) for my COM3 / ttyS2
modem, and it works like a charm.

 
 
 

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