Yes and No ========== There is a very good article on Wave Synthesis written by Motorola available at www.motorola.com It applies to DSP chips, but the essential theory is really what's important. And once you realise how it works, you will be able to tackle any kind of waveform generation. Admittedly, the square wave and ramp signals are simpler than the rest, and I will gladly assist you in private email. At 01:58 PM 1/21/97 -0500, you wrote: >Does anyone have simple way to generate a square wave with a '54, 1 to 500Hz >at 1Hz intervals. Selection done using port b as inputs. > Jan van der Watt [Consultants never charge too much - they work too litlle !]