CRC question

That recent discussion on the CRC chip got me to thinking about something that I hadn't thought of for some years now... My Bigboard II has a bit of interesting code in the EPROM, that does a sort of sanity check on itself. Some sort of a CRC algorithm (I'd have to dig out the code for exact details, and have NO idea of where I'd find it at this point). This thing had six sockets altogether, only 24-pin, so I couldn't put any bigger than a 2732 in them, and one of the nifty features in the code in that one that came with it was that it'd check the _second_ socket the same way. That way, if you had an appropriately-coded chip in there it'd just hand off to it. Seems handy to me as a way to just get the darn thing to boot a disk without you having to tell it to do so. Unfortunately, I have *no* idea how one would make an eprom have the appropriate CRC results. I suspect that one of the important details would be the exact polynomial used to generate the CRC in the first place, and I don't have that handy at the moment, have to figure out just where the heck that is... But any suggestions as to where I might research this further would be appreciated. For some reason, in spite of me having seen lots and lots of full-page ads in Micro-Cornucopia and elsewhere during that time, I can find almost nothing on the machine on the 'net these days. Which is a shame, as it's a nice board, in a lot of ways... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin