Function with parameter in asm

p_function.asm

;main.asm
[org 0x7c00]

global _start
_start:
        mov bx, HELLO_MSG
        call print
        mov ah, 0x0e
        mov al, bl
        int 0x10
        jmp $
        %include "print_string.asm"
        times 510-($-$$) db 0
        dw 0xaa55


;print_string.asm
print:
        pusha
        mov ah, 0x0e
        mov al, bl 
        int 0x10
        popa
        ret