Hi all, Hasn't our very own 'Old Crow' done the very thing in a PIC? Scott? Wasn't it pin for pin replacement too? Regards, Tony Allgood Penrith, Cumbria, England Modular synth circuits, TB303 clone and Filter Rack www.techrepairs.freeserve.co.uk/projects.htm My music: www.mp3.com/taklamakan