I prefer the CMOS versions Neil old TTL versions run hot. I use Unicorn:- http://www.unicornelectronics.com/IC/80000.html for a 82C288-10& 82C284—10. Make sure it’s the 82C2xx and not the 82Cxx. The latter are for the 8086. John From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of nbreeden John, What's the part number for the clock chip; there seems to have been a couple different ones used as the board evolved. I want to make sure I get the right one. -Neil -- |