Integer to Character [Intel 8086]

PILHA   SEGMENT PARA STACK 'STACK'
    db 2048 dup(?)
PILHA   ENDS

DADOS   SEGMENT PARA 'DATA'
;######################### variaveis programa ##################################



    mynum   db  123

    result1 db  5 dup(?)
    result2 db  5 dup(?)



;###############################################################################
DADOS   ENDS

CODIGO  SEGMENT PARA 'CODE'
    ASSUME CS:CODIGO, DS:DADOS, SS:PILHA

INICIO:
    MOV AX, DADOS
    MOV DS, AX
;

;######################### funcoes programa ####################################



    xor si, si      ;si -> 0
    mov cl, 0Ah     ;cl -> 10
    mov al, mynum   ;al -> 123
continuar:
    xor ah, ah      ;ah -> 0
    div cl      ;al:ah -> ax / cl
    ;123 / 10
    ;al = 12
    ;ah = 3

    ;12 / 10
    ;al = 1
    ;ah = 2
    mov result1[si], ah ;result1[si] -> ah


    inc si      ;si -> si + 1

    cmp al, 9       ;compare
    jg continuar    ;jg(jump if greater) jump if al is greater than 9

    ;if the number we are comparing is less than 10, the first digit will be 0
    ;and we dont want to convert that, so, let's make some changes and jump
    ;if the number is greater than 9, we also use the al value, otherwise
    ;we need to remover. Pay attention
    cmp al, 0       ;compare
    jne saltar      ;jump if al is not equal to 0
    dec si      ;si -> si - 1
    xor di, di      ;di -> 0
    jmp inverter    ;jump
saltar:
    mov result1[si], al ;result1[si] -> al
    xor di, di      ;al -> 0
inverter:
    ;after converting, the text will be inverted. For example, convert 123 and the text will be 321.
    ;so, let's invert again
    mov ah, result1[si] ;al -> result1[si]
    add ah, 30h     ;para caracter
    mov result2[di], ah ;result2[di] -> ah
    dec si      ;si -> si - 1
    inc di      ;di -> di + 1
    cmp si, 0       ;compare
    jge inverter    ;jump if si is greater than 0

    mov result2[di], '$';add the end of text
    mov ah, 09h
    lea dx, result2
    int 21h     ;print the result



;###############################################################################

FIM:
    MOV AH,4Ch
    INT 21h

CODIGO  ENDS
END INICIO