HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

          INT 13,18 - Set Media Type for Format (BIOS date specific)


       AH = 18h
       CH = lower 8 bits of number of tracks  (0-1023 dec., see below)
       CL = sectors per track (1-17 dec., see below)
       DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)


       on return:
       ES:DI = pointer to 11-byte Disk Base Table (DBT)
       AH = 00h if requested combination supported
          = 01h if function not available
          = 0Ch if not supported or drive type unknown
          = 80h if there is no media in the drive
       CF = 0 if successful
          = 1 if error


       - valid only for XT BIOS dated after 1/10/86, AT after 11/15/86,
         XT 286 and the PS/2 line
       - only disk number is checked for validity
       - track 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):

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

       - see   INT 13,STATUS

Esc or Alt-X to exit int 13,18 Home/PgUp/PgDn/End ←↑↓→