TTYC_SYNC
[TTYC_SYNC] = { TTYCODE_STRING, "Sync" },
if (tty_term_has(tty->term, TTYC_SYNC)) {
tty_putcode_i(tty, TTYC_SYNC, 1);
if (tty_term_has(tty->term, TTYC_SYNC)) {
tty_putcode_i(tty, TTYC_SYNC, 2);