>The problem I've run into is the oscillator. While the programmer is doing >its thing, it is supplying +5 to the F84, and the rest of the circuit, >which makes the oscillator do its thing, and thus the programming fails. Have a loop-back connector that grounds the oscillator (OSC1 pin) when the programming jack is connected. Andy ================================================================== Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA ==================================================================