W hat are you using that wouldn't run under 9.2.2? Is there no update for that program? I believe that an upgrade that works with 9.2 would also work with 9.1. Unfortunately, I haven't tested this with my own configuration, though with mine, the instructions say that OS 9's (any version) multi-processing extensions are incompatible with my CPU upgrade (a dual 9447A). I think if you're upgrading to a single G4, however, you'll have no issues. Eric On Sun, 2007-09-30 at 10:28 -0700, bill ritchey wrote: > is there a cpu upgrade that will work w/ 9.1 and X on the same > machine? i have a 400 g4 desk top. thanks b > > ______________________________________________________________________ > Moody friends. Drama queens. Your life? Nope! - their life, your > story. > Play Sims Stories at Yahoo! Games. > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4