If I recall right Microchip did not invent the PIC processor. It was available from Intersil before there was a Microchip. the 16x54 series was available in MOS technology and used in many early cable TV boxes. I assume that Microchip has legal use of the design and am not suggesting any wrong doing by Microchip whatever. -- Neil http://www.aade.com mailto:neil@aade.com Almost All Digital Electronics 1412 Elm St. SE Auburn, WA 98092 253-351-9316