instructions -- a PSH -> Pushes the following image byte on the stack PSHw -> Pushes the following image word on the stack PSHx -> Pushes x on the stack PSHxw -> Pushes xw on the stack PSHy -> Pushes y on the stack PSHyw -> Pushes yw on the stack PSHxy -> Pushes x and then y on the stack PSHxyw -> Pushes xw and then yw on the stack