Thanks for the note! The original revision had a socketed BIOS. Hard to find those ones. Most of them were soldered. The one I'm eying is soldered.
edit - And actually, the guy who has the board acquired the /B BIOS chip in case someone is intrepid enough to rip off the old chip and take a soldering iron to the board to put in the new one. Alas, that intrepid individual is not myself.