Still problems with searching and get the right speed to see if an DS1990A is authorized (stored in EEPROM - 24LC65) Hope to could check about 50 iButton in EEPROM fastest possible. Tried to do a binary search, but have not succed to find a code that works, I'm quit new to program microcontrollers. Write my programs in PICBASIC PRO. Using a PIC16F628, 20 Mhz, going to change to a PIC16F876 with more RAM. Very greatful for all help I can get.
Bosse