Which is better (for testing amcient x86 OS's)

[fbsduser]

Hi. I would like to build a "Test bed" PC for ancient OS's (like BeOS, QNX, NextSTEP) that runs on x86 hardware and wanted to know. Which mainboard is more compatible?
VIA based.
Biostar 945GC-M4 (Intel 945GC)
Foxconn K7S741GXMG-6L (SiS 741GX)