打开文件-句柄方式

;文件句柄方式打开文件
code segment
     assume cs:code
main proc far
     jmp start
filename db 'e:/1.txt',0
success db 'ok...',0dh,0ah,24h
faile    db 'error...',0d,0ah,24h

start:
     mov ax,code
     mov ds, ax
     push ds;
    
     mov ax,3d00h
     mov dx,offset filename
     int 21h
    
    
     jb error
    
     mov bx,ax
     mov dx,offset success
    
     mov ah,09h
     int 21h
    
     jmp exit
error:
    
     mov dx,offset faile
     mov ah,09h
     int 21h
exit:
     mov ah,3eh
     int 21h
     mov ah,4ch
     int 21h
main endp
code ends
     end main