HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

             INT 13,8 - Get Current Drive Parameters (XT & newer)

       AH = 08
       DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)


       on return:
       AH = status  (see INT 13,STATUS)
       BL = CMOS drive type
            01 - 5¼  360K           03 - 3½  720K
            02 - 5¼  1.2Mb          04 - 3½ 1.44Mb
       CH = cylinders (0-1023 dec. see below)
       CL = sectors per track  (see below)
       DH = number of sides (0 based)
       DL = number of drives attached
       ES:DI = pointer to 11 byte Disk Base Table (DBT)
       CF = 0 if successful
          = 1 if error


       Cylinder and Sectors Per Track Format

       │F│E│D│C│B│A│9│8│7│6│5│4│3│2│1│0│  CX
        │ │ │ │ │ │ │ │ │ │ └─┴─┴─┴─┴─┴──  sectors per track
        │ │ │ │ │ │ │ │ └─┴──────────  high order 2 bits of cylinder count
        └─┴─┴─┴─┴─┴─┴─┴──────────  low order 8 bits of cylinder count

       - the track/cylinder number is a 10 bit value taken from the 2 high
         order bits of CL and the 8 bits in CH (low order 8 bits of track)
       - many good programming references indicate this function is only
         available on the AT, PS/2 and later systems, but all hard disk
         systems since the XT have this function available
       - only the disk number is checked for validity

Esc or Alt-X to exit int 13,8 Home/PgUp/PgDn/End ←↑↓→