Funny, there's another thread I'm on with another guy dealing with the Intel 810 mobo built in sound and Debian, but right around the same kernel version, which is all that matters. "uname -i" would tell you the running kernel version. There are 3 modules for the i810 sound somewhere in /lib/modules/2.2.x/misc which pertain to the board. I think you'll need to try:
I'm pretty certain that's the right module for the job, also, you might need to 'modprobe soundcore' as I don't remember if Caldera made that part of the kernel or not. If it errors, could you post the output?