;;  Exmaple of a MOV instruction
        
        ORG 100h

        xchg ax, [w1]
        xchg al, [b1]

        xchg ax, dx
        xchg bl, al

        ;;  exit:
        mov ax, 4c00h
        int 21h

w1:     DW 0123h
b1:     DW 01h