Hey guys ! Todays 8 bit experiment was: can i use the VSYNC via a vectored irq (at $10c) to play 1 bit PWM and use the main program to do stuff on the screen at the same time..... YES I CAN ! https://www.youtube.com/watch?v=fZWJmwE5RP8 given, it's not the best video etc, but this gives me the drive to pursue it further..... /Simon :-)