I've found an old RadioShack package with an MK5017BB Clock/Calendar chip. Unfortunately, the datasheet which was once stapled to the back of the card is missing. Google doesn't have much on it. One interesting reference is at www.datamath.org/Mostek_IC.htm where the part number is listed in a series of calculator chips (it lists the MK5017 as having been in the Corvus 305 calculator, with square root, 1/x and a clock/calendar). I also found this picture on the die itself... http://www.mindspring.com/~mary.hall/mosteklives/photos/mostek_mickey.jpg But no specs. Does anyone have info on this thing? Thanks, -ethan -- Ethan Dicks, A-130-S Current South Pole Weather at 31-Mar-2004 07:31 Z South Pole Station PSC 468 Box 400 Temp -78.4 F (-61.3 C) Windchill -117.4 F (-83 C) APO AP 96598 Wind 8.5 kts Grid 018 Barometer 675.5 mb (10796. ft) Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html