h203.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 dw 5834
w2 dw 1539
buf db 6 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,W1
      ADD AX,W2
      MOV BX,AX
      AND AL,0FH
      CMP AL,0AH
      JB HERE1
      ADD AL,7H
HERE1:ADD AL,30H
      MOV BUF+3,AL

      MOV AX,BX
      MOV CL,4
      SHR AX,CL
      AND AL,0FH
      CMP AL,0AH
      JB HERE2
      ADD AL,7H
HERE2:ADD AL,30H
      MOV BUF+2,AL

      MOV AX,BX
      AND AH,0FH
      CMP AH,0AH
      JB HERE3
      ADD AH,7H
HERE3:ADD AH,30H
      MOV BUF+1,AH

      MOV AX,BX
      SHR AX,CL
      AND AH,0FH
      CMP AH,0AH
      JB HERE4
      ADD AH,7H
HERE4:ADD AH,30H      
      MOV BUF,AH
      MOV BUF+4,'B'
      MOV BUF+5,'$'

      mov dx,offset buf
      mov ah,9
      int 21h
      ret
begin endp
code ends
     end begin