On 10 Nov 2007 at 17:42, Roy J. Tellason wrote: > Hopefully I'll either find that loose-leaf binder and it'll be in there or > I'll come across it out there somewhere on the 'net. As Al's posted the image of the EPROM source, it's pretty obvious at a glance that a CRC is used. Look for the routine "CRCGEN". Cheers, Chuck