x86-bare-metal-examples/bios_putc.S

/* https://github.com/cirosantilli/x86-bare-metal-examples#bios-examples */

#include "common.h"
BEGIN
/* 40 == ASCII for '@'
 * 0E == BIOS function ID.
 */
mov $0x0E40, %ax
int $0x10
hlt