org 100h
        use16

Start:
        push    array
        push    eleme

        call    Counter

        ; count of elms in AX

        ret

Counter:
        push    BP
        mov     BP, SP

        mov     DI, [BP + 6]
        mov     BX, [BP + 4]
        mov     DX, [BX]

        mov     AX, 0
        mov     CX, length
Searching:
        cmp     DL, byte[DI]
        jbe     CheckNext

        inc     AX
CheckNext:
        inc     DI
        loop    Searching

        pop     BP
        ret     4

array   db      2, 5, 6, 2, 8, 12, 45, 0, 1, 4, 7, 2
length  = $ - array
eleme   db      5