INT 13 - FIXED DISK - FORMAT DRIVE STARTING AT GIVEN TRACK (XT,PORT)
        AH = 07h
        AL = interleave value (XT only)
        ES:BX = 512-byte format buffer (see AH=05h)
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = sector number
        DH = head
        DL = drive
Return: AH = status code (see AH=01h)
Note:   AWARD AT BIOS extended to handle more than 1024 cylinders by placing
          bits 10 and 11 of the cylinder number into bits 6 and 7 of DH
SeeAlso: AH=06h"FIXED",AH=1Ah