instructions b p -> STB -> store a byte to direct page address p STBw -> store a byte to absolute address p STBx -> store a byte to direct page address x STBxw -> store a byte to absolute address xw STBy -> store a byte to direct page address y STByw -> store a byte to absolute address yw STBxy -> store a byte to direct page address x and y STBxyw -> store a byte to absolute page address xw and yw