gf2k_read_packet
if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
gf2k_read_packet(gameport, gf2k->length, data);