---

.model small
.stack 100h
.data
    a db -50
    b db 30
    f dw ?
.code
start:
    mov ax, @data
    mov ds, ax

    mov al, a
    cbw
    mov bl, 19
    idiv bl
    add ah, 19
    mov al, ah
    cbw
    mov bl, 19
    idiv bl
    mov dl, ah

    mov al, b
    cbw
    mov bl, 17
    idiv bl
    add ah, 17
    mov al, ah
    cbw
    mov bl, 17
    idiv bl
    mov dh, ah

    mov bh, 0
    add bx, dx
    mov f, bx

    mov ax, 4Ch
    int 21h
end start