MAX_SECTORS_PER_TRACK
dos_sectors > MAX_SECTORS_PER_TRACK) {
#define DOSSECT(s,c) ((s & MAX_SECTORS_PER_TRACK) | ((c >> 2) & 0xc0))
if (dos_sectors > MAX_SECTORS_PER_TRACK ||
sectors = MAX_SECTORS_PER_TRACK;