chp3_2-1.asm

关于8086汇编的一些作业程序

stack segment stack'stack'
      dw 32 dup(?)
stack ends
data segment
B1 DB 23H
B2 DB 14H
B3 DB 20H
B4 DB 15H
B5 DB ?
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 AL,B1
      ADD AL,B2
      MOV BL,AL
      MOV AH,B3
      SUB AH,B4
      MOV AL,AH
      DAS 
      SUB BL,AL
      MOV AL,BL
      DAS
      MOV B5,AL
      ret
begin endp
code ends
     end begin