Hi David, I have been working on a PIC16C74a project as well for some time. I am a EE at Apple Computer. I recommend MPLAB from Microchip. It has a macro assembler that will generate .hex files for the PIC programmer. For about $300 or less you get MPLAB and the PICstart programmer. I have had great success with Microchips development tools. Lots of great info on their website www.microchip.com Good luck, Claude Wright