Brian Read wrote: >Phillips makes PCF8570 & 8571, 128 X 8 & 256 X 8 Static >RAMs. Both I2C devices in 8 pin packages. .. And someone (Xicor or Dallas, I think) makes a chip that contains both RAM and EEPROM. The way it works is, you write to and read from the RAM until your power supply gets low, then the entire RAM array is automatically copied to EEPROM. This gives all the advantages of both RAM and EEPROM, but, of course, costs a little more than either alone. -Andy -- Andrew Warren - fastfwd@ix.netcom.com Fast Forward Engineering, Vista, California