Ravindra, I noticed nobody responded to this yet. Check out the Microchip Web Page and look at MPSIM. DOS Command Line Based and probably the most accurate one you can get for the 16C84. myke >can anyone point me to a DOS based >free PIC16C84 (time-tested) simulator? >doesnt matter if it doesnt simulate interrupts... > > "Aliens are really just the same as us, only their molecules are different" - Will Robinson