instructions w p -> STW -> store a word to zero page address p STWw -> store a word to absolute address p STWx -> store a word to zero page address x STWxw -> store a word to absolute address xw STWy -> store a word to zero page address y STWyw -> store a word to absolute address yw STWxy -> store a word to zero page address x and y STWxyw -> store a word to absolute page address xw and yw