//not there 

org 100h
mov BL,00H
mov BH,00H
mov SI,1100H
MOV CL,01H
MOV CH,[SI]
INC SI
LOOP:MOV AL,[SI]
 SHL AL,CL
 JC NEGATIVE
 INC BL
 JMP NEXT
NEGATIVE:INC BH
NEXT:ADD SI,01H
 DEC CH
 JNZ LOOP
 MOV [1200H],BL
 MOV [1201h],BH
 HLT