STRING
DB‘ABCDEFGHIJ’
MOVAH,01從鍵盤輸入字符1~9
INT21H
ANDAL,0FH
DECAL
XORAH,AH
MOVBX,OFFSETSTRING
ADDBX,AX
MOVBL,[BX]
MOVAH,02H
;顯示輸出
INT21H
:
試回答:
程序段如下:
BLK1 DB 46,84,34,-5,20,122,73
:
MOV CX,7
LEA S1,BLK1
NEXT:MOV AL,[SI]
INC SI
TEST AL,81H
LOOPZ NEXT
MOV BL,[SI]
:
請回答程序段運行后:
(AL)=?
(BL)=?
(AL)=-5或0FBH
(BL)=14H或20
分析下面程序段,
MOV AL,200
SAR AL,1
MOV BL,AL
MOV CL,2
SAR AL,CL
ADD AL,BL
試問程序段執(zhí)行后
(BL)=?
(AL)=?
(BL)=0E4H
(AL)=0DDH