At 02:57 PM 12/29/97 -0600, you wrote: > >i think its something to do with A'F' because it happened to me too in a >program i made Just so everyone knows, you shouldn't use the alternate registers (the ex af,'af and exx instructions) because the interrupt uses them to save registers. So when an interrupt gets called 200 times a second, the alternate registers get messed up. --Joshua