Question

50分之汇编之最后一练习题..哈..真的有难度..但不知道杂写..!详细看图!

Answer 1

七、
1、DATAS SEGMENT
DA_BYTE1 DB ?
ORG 100H
DA_BYTE2 DB ?
DATAS ENDS

STACKS SEGMENT
DW 10 DUP(0)
STACKS ENDS

CODES SEGMENT
ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
MOV AX,DATAS
MOV DS,AX
LEA SI,DA_BYTE1
LEA DI,DA_BYTE2
CMP BYTE PTR [SI],0
JG A1
MOV BYTE PTR [DI],0
JMP A2
A1: MOV BYTE PTR [DI],1
A2: MOV AH,4CH
INT 21H
CODES ENDS
END START
2、DATAS SEGMENT
DA_BYTE1 DB ?
ORG 100H
DA_BYTE2 DB ?
DATAS ENDS

STACKS SEGMENT
DW 10 DUP(0)
STACKS ENDS

CODES SEGMENT
ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
MOV AX,DATAS
MOV DS,AX
LEA SI,DA_BYTE1
LEA DI,DA_BYTE2
MOV AL,[SI]
XCHG AL,[DI]
MOV [SI],AL
MOV AH,4CH
INT 21H
CODES ENDS
END START

追问

高手,能帮我确定下这题吗?

http://zhidao.baidu.com/question/426640791.html?quesup2&oldq=1

Answer 2

1.
主程序：

mov al,DA_BYTE1
cmp al,0
JG STA1
MOV al,0
JMP STA2
STA1:MOV al,1
STA2:MOV DA_BYTE2,al

2.
主程序：
MOV AL,DA_BYTE1
MOV AH,DA_BYTE2
MOV DA_BYTE2,AL
MOV DA_BYTE1,AH

你看看怎么样

追问

实话说!看不懂!..
高人,先帮我看下选择题吧!..只有4题
http://zhidao.baidu.com/question/426637716.html?quesup2&oldq=1