pm0.asm

cxzv dvsdsd sd fsdf sdf sd f

data segment
  sum dd 0
data ends   
text segment 'code' use16        
     assume cs:text              
     begin: mov ax,data          
            mov ds,ax            
                                 
            mov eax,0FF000000h   
            mov ebx,64h          
            mov cl,0Ah           
                                 
            shld ebx,eax,cl      
                                 
            bsf ax,ebx           
                                 
            bsr dx,ebx           
                                 
            mov dword ptr sum,ebx
            
            mov ah,4ch
            int 21h
text ends
end begin