D'oh! I'm an idiot... There are 64h (100) interrupts in a cursor blink, not 64. So at 66 cursor blinks per minute, the real total is more like 110 interrupts per second on my contrast 5 TI83. _________________________________________________________________ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail