On 6/1/2006 at 11:57 AM BOB LAAG wrote: >Just wondering if anyone has description and pinout of the old 989102 >and 989105 I.C. chips??? Bob, if you'll tolerate a completely uninformed opinion, these sound like "house numbers" and may well be something like mask-programmed ROMs. Can you tell us who manufactured the chips? Cheers, Chuck