instructions a8 addr -- STB -> store a byte to direct page address STBw -> store a byte to absolute address 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