David,
The status page http://www.acl.lanl.gov/linuxbios/status/index.html shows that the Pcchips m830lr mainboard is supported by linuxbios. m8310lr seems as same as elite k7s5a, both of them use sis735 chipset. I am a little confused.
Yes, LinuxBIOS does support 830 but it can't be used with DOC. However, LinuxBIOS + etherboot works fine. In this case, you either can boot from network or ide device(harddisk/CF).
-Andrew