HP300_LIF_FILESTART
lseek(to, HP300_LIF_FILESTART, SEEK_SET);
lifd[0].dir_addr = htobe32(hp300_btolifs(HP300_LIF_FILESTART));
lseek(to, HP300_LIF_FILESTART + hp300_lifstob(nsec), SEEK_SET);
lseek(to, HP300_LIF_FILESTART + hp300_lifstob(lifd[0].dir_length