conv16
#define conv16(m) (mem->m = V7FS_VAL16(fs, (disk->m)))
#undef conv16
#define conv16(m) (disk->m = V7FS_VAL16(fs, (mem->m)))
#undef conv16
#define conv16(m) (to->m = V7FS_VAL16(fs, from->m))
#undef conv16