I am running MPLAB 3.09.10 under Win95 and have noticed that simulation speed increases if I move the mouse around. With no mouse movement the simulator runs at about 200 cycles/sec but when moving the mouse this increases to 2000 cycles/sec. Is this a feature or a bug? Gary. -------------------------------------------- Email: Gary.Fowler@dsto.defence.gov.au Phone: +61 8 8259 5767 Fax: +61 8 8259 5672 Defence Science & Technology Organisation PO Box 1500, Salisbury, South Australia 5108 --------------------------------------------