poly1: .byte 10, 9, 8, 7, 6,... poly2: .byte 10, 9, 8, 7, 6,... result: .byte 0, 0, 0, 0, 0, 0,...To read values from an array, use the ldub instruction (not ldb like I originally said---that instruction does not exist). Use indexed or base + index addressing. To write values to an array, use the stb instruction.