The 1.3 rev of the KT7A plus a BIOS update is supposed to support Athlon XP (don't know how fast). The BIOS update must be installed using an older Tbird or Duron because the system might not POST without the update.
Earlier revs may work with some tricks. (I think the trick was pressing reset right after a cold boot then the system would POST). A BIOS update is still required.
Checkout <A HREF="http://www.viahardware.com/faq/kt7/kt7faq.htm" target="_new">Paul's Unofficial Abit KT7 FAQ</A> for more details.
<b>I have so many cookies I now have a FAT problem!</b>