---

in ax, 2

; A
mov bx, ax
and bx, 007Fh

; B
mov cx, ax
and cx, 0F80h
shr cx, 7

; C
mov si, ax
and si, 0F000h
shr si, 12

; A/B
mov ax, bx
mov bx, cx

xor dx, dx
div bx

; +C
add ax, si

out 3, ax

hlt