[bits 16]

;print_string routine ([bx])
;this routine will print a null terminated string at [bx] to the screen.
print_string:

    pusha			;push all registers
    mov ah,0x0e

    print_string_loop:

	;check if value at [bx] is "\0" (end of string)
	mov cl,[bx]
	cmp cl,0
	je print_string_finish

	;otherwise instruct BIOS to print the current char
	mov al,cl
	int 0x10

	;proceed with next char
        inc bx
	jmp print_string_loop

    print_string_finish:

    popa			;pop all registers
    ret				;return to caller