I can send and receive data to the mcu. I'm using the usbout command for debugging right now. It sends 3 16 bi twords in one buffer to hyperterminal right now. I just can't figure out how to send a specific value to the mcu and have it wait for 256 byte of data and rewrite the contents of the eeprom with those values. I would also lite to dump the contents of the mcu eeprom back to my pc.