请高手解决微机原理与接口技术题谢谢

题目

请高手解决微机原理与接口技术题谢谢
1． MOV AX,4B3AH,
AND AH,0FH
XOR AL,0F0H
SHL AH,1
SHR AL,1
执行上述指令序列后,AH=_________,AL=_______
2. MOV AX,0
MOV CX,5
L1：ADD AX,CX
DEC CX
JNZ L1
RET
执行上述指令序列后AX=__________,CF=__________.

答案

1． MOV AX,4B3AH,
AND AH,0FH ; ah = 0Bh
XOR AL,0F0H ; al = CAH
SHL AH,1 ; AH = 16h
SHR AL,1 ; AL = 65H
执行上述指令序列后,AH=____16H_____,AL=_____65H__
2. MOV AX,0
MOV CX,5
L1：ADD AX,CX
DEC CX
JNZ L1
RET
执行上述指令序列后AX=___5+4+3+2+1=15_______,CF=_______0___.