chp2_11.asm

关于8086汇编的一些作业程序

stack segment stack'stack'
      dw 32 dup(?)
stack ends
data segment
FIRST DD 98765432H
W1 DW ?
W2 DW ?
SECOND 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 FIRST+2
      MOV BX,WORD PTR FIRST
      MOV W1,BX
      AND BH,0C0H
      MOV CL,2
      SHL AX,CL
      MOV CL,6
      SHR BH,CL
      ADD AL,BH
      MOV BX,W1
      MOV CL,2
      SHL BX,CL
      MOV SECOND,BL
      MOV SECOND+1,BH
      MOV SECOND+2,AL
      MOV SECOND+3,AH
      ret
begin endp
code ends
     end begin