section .bss
 msg resb 1 ; reserva 1 byte para um caractere
 
section .data
 traco db '-'
 contador dd 0
 
section .text
 global _start
 
_start:
; Lê 1 caractere do teclado
 mov eax, 3 ; sys_read
 mov ebx, 0 ; stdin
 mov ecx, msg ; onde armazenar
 mov edx, 5 ; quantos bytes
 int 0x80 ; chamada de sistema
 
 mov dword [contador], 10
 
 imprime_caractere:
 mov eax, 4 ; sys_write
 mov ebx, 1 ; stdout
 mov ecx, msg ; endereço da string
 mov edx, 5 ; tamanho da string (8 chars + newline)
 int 0x80 ; chamada de sistema
 
 cmp dword [contador], 0
 je exit
 
 ; Decrementa o contador
 dec dword [contador]
 
 ; Repete o processo
 jmp imprime_caractere
 
 exit:
 mov eax, 1 ; sys_exit
 mov ebx, 0
 int 0x80

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