bits 16 mov al, 0 mov ah, 0 mov ax, 0 mov bl, 0 mov bh, 0 mov bx, 0 mov cl, 0 mov ch, 0 mov cx, 0 mov dl, 0 mov dh, 0 mov dx, 0 mov sp, 0 mov bp, 0 mov si, 0 mov di, 0 mov es, ax mov cs, ax mov ss, ax mov ds, ax