æ±ç¼è¯è¨ååç¨åºæ¶ï¼ä¸è¬éè¦å°è¯¥åç¨åºä¸ç¨å°çå¯åå¨å 以ä¿æ¤ï¼æ¯å¦æ常ç¨å°çç´¯å å¨Aã举ä¾è¯´æï¼
GETDAT:
PUSH ACC ;åæ ä¿æ¤ç´¯å å¨ï¼å 为åç¨åºä¸ä¼æ¹åå ¶å¼
PUSH DPL ;åæ ä¿æ¤æ°æ®æéï¼åç¨åºä¸ä¼æ¹åæ°æ®æé
PUSH DPH
MOV DPTR,#1000H
MOVX A,@DPTR
MOV 30H,A
INC DPTR
MOVX A,@DPTR
MOV 31H,A
POP DPH ;åè¿å åºï¼å¼¹åºæ°æ®æé
POP DPL
POP ACC ;æ¢å¤ç´¯å å¨Açå¼
RET
GETDAT:
PUSH ACC ;åæ ä¿æ¤ç´¯å å¨ï¼å 为åç¨åºä¸ä¼æ¹åå ¶å¼
PUSH DPL ;åæ ä¿æ¤æ°æ®æéï¼åç¨åºä¸ä¼æ¹åæ°æ®æé
PUSH DPH
MOV DPTR,#1000H
MOVX A,@DPTR
MOV 30H,A
INC DPTR
MOVX A,@DPTR
MOV 31H,A
POP DPH ;åè¿å åºï¼å¼¹åºæ°æ®æé
POP DPL
POP ACC ;æ¢å¤ç´¯å å¨Açå¼
RET
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第1个回答 2011-11-01
一般是两种寄存器需保护 一是在子程序中会直接使用的 二是在子程序中会被破坏的本回答被网友采纳
第2个回答 2011-11-02
stack segment
db 64 dup (?)
stack ends
data segment
msg1 db 'There are some empty rows under this row!','$'
msg2 db 'Success!','$'
data ends
code segment
assume cs:code,ds:data,ss:stack
start:
mov ax,data
mov ds,ax
mov ah,09H
mov dx,offset msg1
int 21H
mov ax,4
call WRITE
mov ah,09H
mov dx,offset msg2
int 21H
exit:
mov ah,07H
int 21H
mov ax,4C00H
int 21H
WRITE:
;(插入空行,AX=所空行数)
;(注:AX为0时为重起一行)
mov cx,ax
inc cx
mov ah,02H
WRITE001:
mov dl,0DH
int 21H
mov dl,0AH
int 21H
loop WRITE001
ret
code ends
end start
db 64 dup (?)
stack ends
data segment
msg1 db 'There are some empty rows under this row!','$'
msg2 db 'Success!','$'
data ends
code segment
assume cs:code,ds:data,ss:stack
start:
mov ax,data
mov ds,ax
mov ah,09H
mov dx,offset msg1
int 21H
mov ax,4
call WRITE
mov ah,09H
mov dx,offset msg2
int 21H
exit:
mov ah,07H
int 21H
mov ax,4C00H
int 21H
WRITE:
;(插入空行,AX=所空行数)
;(注:AX为0时为重起一行)
mov cx,ax
inc cx
mov ah,02H
WRITE001:
mov dl,0DH
int 21H
mov dl,0AH
int 21H
loop WRITE001
ret
code ends
end start
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