mac_mmc_seek
if (!mac_mmc_seek(cursor, pos)) {
if (!mac_mmc_seek(cursor, pos)) {
if (!mac_mmc_seek(cursor, pos)) {
if (!mac_mmc_seek(&cursor, off)) {
if (!mac_mmc_seek(&cursor, l2_end)) {
if (!mac_mmc_seek(&cursor, l3_end)) {
if (!mac_mmc_seek(&cursor, l4_end)) {