BCM 567/568 MOTHERBOARD

I HAVE A NEC READY 9732 SYSTEM. MY MOTHERBOARD IS MADE BY A COMPANY NAMED BCM. NEC NO LONGER SUPPORTS THIS PRODUCT. I WANTED TO UP GRADE MY PENTIUM 166MGZ. I WOULD LIKE TO KNOW WHATS MY SOCKET AND WHAT IS THE LIMITATION ON MY MOTHERBOARD. ANY INFO WOULD GREATLY APPECIATED