I've kept searching, and finally did 'locate modules', which has been informative. Haven't always paid attention to the boot-up sequence, but did and found that it copies a kernel-specific module file into a "generic" module file. Looking in there I found a '3C509' module, instead of 'tulip'.

I realized I'd swapped nic's between knoppix box and router box some time ago. I edited the kernel/module file and now the right module gets loaded. However, dhcp is not getting an address setup, even though the boot up screen shows it asking for dhcp.

Is there a setup program on the installed HD system to help deal with and correct this?

Thanks,

John