instructions a -- a++ INC -> Increments the top byte on the stack by 1 INCw -> Increments the top word on the stack by 1 INCx -> Increments x by 1 INCxw -> Increments xw by 1 INCy -> Increments y by 1 INCyw -> Increments yw by 1 INCxy -> Increents x and y by 1 INCxyw -> Increents xw and yw by 1