Microprocessor lab external-1

       I have already explained in my previous blog post about how my microprocessor lab external was but now I would like to just write the program I had got in the exam so that I can recall easily later whenever necessary.

     The question I had got was : Write an alp to perform block interchange of data.

The solution goes like this :

Data segment 

X db 01h,02h,03h,04h,05h

Y db 11h,12h,13h,14h,15h

Data ends

Code segment

Assume cs:code,ds:data

Start:mov ax,data

         Mov ds,ax

         Mov cx,05h

         Lea si,x

         Lea di,y

Up:mov bl,[si]

      Mov al,[di]

      Mov [si],al

      Mov [di],bl

      Inc cx

      Inc dx

      Dec cx

      Jnz up

      Mov ah,4ch

      Int 21h

Code ends

End start