Hi i use a combination of ME Labs pic basic compiler and EPIC programmer. up until now, i have been using the EPIC with 16F84s. i now have a 12c672JW chip and i want to program it. i made a circuit board with an adapter for the 8 pin chip. compiled my working code for the 12c672 chip and loaded up EPIC. now, there was not an option on the screen for my chip, so i chose the 12c5x chip because it had an internal oscillator circuit (with that option) anyway as you may guess from my posting, it doesn't work, and i wondered if anyone could give me some ideas. (my code seems to be readable from the eeprom - so i guess that the writing process went ok. thanks Pete