; r3 high, a low, r1 denominator
; result r2 low, r4 high
mov r3, #07h
mov a, #0d1h
mov r1, #03h

mov r2, #0h
mov r4, #0h
nhi:
    clr c
ncarry:
    subb a, r1
    mov 22h, c
    cjne r2 , #0FFh , notovf

    ;mov r2, #00h
    inc r4
notovf:
    inc r2
    mov c, 22h

    jnc ncarry
    dec r3
    cjne r3, #0FFH,nhi

dec r2
nnop :ljmp nnop