Hello LIST, I am using a 24C01C to store register information to be recalled a power-up. For some strange reason I can only address locations Hex 0x02, 0x04, 0x06. All other are un-addressable. Has anyone ever seen this before? Jess LaFentres Electro/Mech. Eng. Global Surgical Corp. 3610 Tree Court Ind. Blvd. St. Louis MO 63122-6622 (314)861-5286 Phone (314)225-2036 Fax jlafentr@globalsurgical.com