pjhutch wrote:
Highly unlikely as the pin layouts are totally different. You would be better off with a new board!
Back in the day, "Overdrive" chips were quite common. They were next generation processors for old generation motherboards. There were definately Pentium 1 overdrive chips for 486 boards, and I seem to vaguely recall something similar where you could put a 486 on a 386 board. Good luck trying to find one now, though ;-)