Need help for adding modems to SUN-SLC

[Peter Lucas]

I want to install a modem as dial-in/out modem on a SUN4-SLC.
It turns out that this can be done by using the new ttysoftcar command
that has been added to SunOS 4.1, but I have not been able to
get this running properly.  I therefore decided that the modifying the
kernel would be the fastest.  Unfortunately, the documentation of
SUN only mentions how to precede in case of a SUN3 CPU board, and
does no mention the SUN4-SLC.
The documentation for the SUN3 mentions to change the following line

device zs0 at obio ? csr 0x20000 flags 3 priority

in the kernel configuration file (GENERIC).
I inspect the file /usr/share/sys/sun4c/conf/GENERIC on my SLC
and didn't find any specification of a device, only pseudo-devices.

Now, I have the following question:

Is it enough if I add the following line

device zs0 at obio ? csr 0x20000 flags 2 priority

to the GENERIC file and build a new kernel vmunix to get things working?

Thanks in advance for replying,

Peter Lucas
(lucas at fwi.uva.nl)