multiplication of two 16 bit numbers

.model small

data  segment  

a dw 1234H

b dw 0100H

data ends

code  segment

assume cs:code,ds:data

            mov      ax, data           

            mov      ds, ax

            mov      ax, a                

            mov      bx, b               

            mul       bx       

        mov     bx,dx       

            mov      ah, 4cH           

            int         3H

code ends

end

2’s Compliment

.model small

.data

a dw 1234H

.code

            mov      ax, @data       

            mov      ds, ax

            mov      ax, a                

            mov      cx, 16              

up:        rcl        ax, 1                

            cmc                             

            loop     up                   

            rcl        ax, 1                

            add      ax, 1                

           

            mov      ah, 4cH

            int  3H

            end

1’s Compliment

.model small

.data

  a db 04H

.code

            mov      ax, @data       

            mov      ds, ax

            mov      al, a                 

            mov      cx, 08              

up:        rcl        al, 1                 

            cmc                             

            loop     up                   

            rcl        al, 1                 

            add      al, 1                 

           

            mov      ah, 4cH

            int  3H

            end 

PROGRAM FOR TO FIND SMALL NO. BY COMPAIRING TWO Numbers

model small
.data
a db 09H
b db 08H 
.code
mov ax, @data
mov ds, ax
mov ah, 0
mov al, a
mov bl, b
mov bh, 0

cmp bl,al
jnc x
mov al,bl
x: mov ah, 4cH
int 3H
end