Hi folks, Can anybody help with the following questions I have regarding the PIC processors; 1) When enabling the internal port pull-ups on PIC processors, approximately what value of pull-up resistance is applied internally to the individual bits on the port ?. 2) Is this value approximately the same for all types of PIC processors with this feature ?. 3) It was mentioned in conversation that a design containing a PIC 16c84 managed to lose some of its program when exposed to an environment with arc welding equipment in close proximity to the system, no direct contact as far as I am aware, the processor was apparently the heart of a car alarm, and the car alarm suffered when parked in close proximity to arc welders on a construction site or so I'm told, is this possible ??. can anybody give input on this or any other experiences where an EEPROM can lose or corrupt its data whilst in certain environments ???. Many Thanks to all for a great forum Arthur, cipherlink@icon.co.za Absurdity, n.: A statement or belief manifestly inconsistent with one's own opinion. -- Ambrose Bierce, "The Devil's Dictionary"