Programs that are known to work well: bin_tic-tac-toe_new_code_12-16-61.bin, seems to fully work: sim> boot petr sim> g (will halt with 205200 in LR) sim> e lr LR: 205200 sim> g (again to start game.) bin_tstDisplay.bin, makes a diagonal line on the DPY bin_lightGunTst.bin, can draw on screen with light pen. bin_newMouse_3-22-66.bin - These kind of work, but mouse gives up easy bin_newMouse_8-14-61.bin - and can crash on complex mazes. Sim bug somewhere.