Int 13 Fn 1A  - Esdi Fixed Disk - Format Unit (ps)                         [d]

   AH = 1Ah
   AL = defect table entry count
   CL = format modifiers (see #0182)
   DL = drive (80h,81h)
   ES:BX -> defect table (see #0183), ignored if AL=00h

Return: CF set on error
   CF clear if successful
   AH = status (see #0166 at AH=01h)

Note:  if periodic interrupt selected, INT 15/AH=0Fh is called after each
     cylinder is formatted

See Also: AH=07h,INT 15/AH=0Fh

Bitfields for ESDI format modifiers:
Bit(s) Description (Table 0182)
 4 generate periodic interrupt
 3 perform surface analysis
 2 update secondary defect map
 1 ignore secondary defect map
 0 ignore primary defect map

Format of defect table entry [array]:
Offset Size    Description (Table 0183)
 00h  3 BYTEs  relative sector address (little-endian)
 03h   BYTE    flags and defect count
       bit 7: last logical sector on track
       bit 6: first logical sector on track
       bit 5: last logical sector on cylinder
       bit 4: logical sectors are pushed onto next track
       bits 3-0: number of defects pushed from previous cylinder