kbd_cmd_read_1
if ((kbd_cmd_read_1() & KBS_DIB) == 0)
if ((kbd_cmd_read_1() & KBS_IBF) == 0) {
if ((kbd_cmd_read_1() & KBS_DIB) != 0) {
while ((c = kbd_cmd_read_1()) & 0x03)
if (kbd_cmd_read_1() & KBS_DIB) {
if ((kbd_cmd_read_1() & KBS_DIB) != 0) {
if ((kbd_cmd_read_1() & KBS_DIB) == 0)
} while (kbd_cmd_read_1() & KBS_DIB);
while ((kbd_cmd_read_1() & KBS_DIB) == 0);