That wouldn't be the hardware reset, would it? I've heard that when the calc first starts up after a battery-pull, there is a short piece of code near or at the beginning of the ROM that resets everything... ? > ... In fact, the first > two instructions the rom executes are <ld a,$57 \ out (4),a>. It has > something to do with the hardware, but no one except Pat knows. You'd have > to ask him.