kh21.asm

关于8086汇编的一些实验程序

stack segment stack'stack'
      dw 32 dup(?)
stack ends
data segment
W1 DD 08020407H
W2 DD 06030609H
OBF DB 5 DUP(?)
data ends
code segment
begin proc far
      assume ss:stack,cs:code,ds:data
      push ds
      sub ax,ax
      push ax
      mov ax,data
      mov ds,ax

      MOV AX,WORD PTR W1
      MOV BL,BYTE PTR W2
      SUB AL,BL
      AAS
      MOV DL,AH
      OR AL,30H
      MOV OBF+3,AL
     
      MOV AX,WORD PTR W1+1
      MOV AL,DL
      MOV BL,BYTE PTR W2+1
      SUB AL,BL
      AAS 
      MOV DL,AH
      OR AL,30H
      MOV OBF+2,AL

      MOV AX,WORD PTR W1+2
      MOV AL,DL
      MOV BL,BYTE PTR W2+2
      SUB AL,BL
      AAS
      MOV DL,AH
      OR AL,30H
      MOV OBF+1,AL

      SUB AH,BYTE PTR W2+3
      OR AH,30H
      MOV OBF,AH
      
      

     


      MOV OBF+4,'$'
      MOV DX,OFFSET OBF
      MOV AH,9
      INT 21H
      
      ret
begin endp
code ends
     end begin