DRIVE_ATA
if (drvp->drive_flags & DRIVE_ATA) {
#define DRIVE (DRIVE_ATA|DRIVE_ATAPI|DRIVE_OLD)
chp->ch_drive[drive].drive_flags |= DRIVE_ATA;
~(DRIVE_ATA | DRIVE_ATAPI);
chp->ch_drive[0].drive_flags |= DRIVE_ATA;
if (drvp->drive_flags & DRIVE_ATA)
chp->ch_drive[0].drive_flags |= DRIVE_ATA;
chp->ch_drive[0].drive_flags |= DRIVE_ATA;