chp2_13.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
FORTH 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+2
      MOV BX,WORD PTR FIRST
      NEG AX
      DEC AX
      NEG BX
      MOV SI,OFFSET FORTH
      MOV [SI],AH
      MOV [SI+1],AL
      MOV [SI+2],BH
      MOV [SI+3],BL
      ret
begin endp
code ends
     end begin