instructions a16 addr -- STW -> store a word to direct page address STWw -> store a word to absolute address STWx -> store a word to direct page address x STWxw -> store a word to absolute address xw STWy -> store a word to direct page address y STWyw -> store a word to absolute address yw STWxy -> store a word to direct page address x and y STWxyw -> store a word to absolute page address xw and yw