e6_6.asm

ZHUYAO ZSHI LAI JIECHUADE LAIDE

stack segment stack
      db 256 dup(?)
stack ends
data segment
     x dw 380h
     y db ?
data ends
code segment
     assume cs:code,ds:data,ss:stack
star:mov ax,data
     mov ds,ax
     mov ax,x
     or ax,ax
     je zero
     jns plus
     mov bl,0ffh
     jmp exit
zero:mov bl,0
     jmp exit
plus:mov bl,1
exit:mov y,bl
     mov ah,4ch
     int 21h
code ends
     end star