HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                INT 21,44,8 / IOCTL,8 - Device Removable Query

       AH = 44h
       AL = 08
       BL = drive number (0=default, 1=A:, 2=B:, 3=C:, ...)


       on return
       CF = 0 if successful
          = 1 if error
       AX = 00  removable media
          = 01  non-removable media
          = error code if CF set  (see DOS ERROR CODES)


       - used to determine if a device supports removable media
       - RAM disks are not considered removable media
       - device drivers compatible with DOS 2.0 do not always respond
         correctly to this query
       - implemented from DOS 3.0;  for earlier DOS versions drive A: and
         B: are removable media since DRIVER.SYS/SUBST are DOS 3.0+ only

Esc or Alt-X to exit int 21,44,8 Home/PgUp/PgDn/End ←↑↓→