mov r16, 0; means ldi r16, 0 mov r16, r16; meand mov r16, r16 mov r16, [0x1234]; means lds r16, 0x1234 mov r16, [ds:0x1234]; means lds r16, 0x1234 mov [0x1234], r16; means sts 0x1234. r16