n2_1-1.asm

关于8086汇编的一些作业程序

stack segment stack'stack'
      dw 32 dup(?)
stack ends
data segment
FIRST DD 18765432H
W1 DW ?
W2 DW ?
SECOND DB 4 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
      MOV DX,0
      MOV CX,4
      MUL CX
      MOV W1,DX
      MOV W2,AX
      MOV AX,WORD PTR FIRST+2
      MOV DX,0
      MUL CX
      ADD AX,W1
      MOV BX,W2
      MOV SI,OFFSET SECOND
      MOV [SI],AH
      MOV [SI+1],AL
      MOV [SI+2],BH
      MOV [SI+3],BL

      
      ret
begin endp
code ends
     end begin