![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
MOV 20H , #0A3H 2 、 MOV SP , #49H MOV A , #0B6H MOV 30H , #3FH MOV R0 , #20H MOV 31H , #48H MOV R2 , #7EH CLR A ORL A , R2 PUSH Acc ANL A , @R0 PUSH 31H SWAP A POP Acc CPL A POP 30H XRL A , #0F5H SJMP $ ORL 20H , A 执行后,( A ) =? ( 30H ) =? ; SJMP $ (3 1H ) =? ;( SP ) = ? 。 执行后, ( A ) =? ;( 20H ) = ? 。