INT 13h,  07h (7)        Format Disk Starting at Cylinder          fixed disk

Initializes each sector on a specified cylinder and all subsequent
cylinders with sector address and size information. Only XTs may use
this service.

On entry:      AH         07h
AL         Interleave value
CH         Cylinder number (10-bit value; upper 2 bits
in CL)
DL         Drive number (Bit 7 must be set)

Returns:       AH         Status of operation (See Service 01h)
CF         Set if error, else cleared

                                                                          

Notes:         This service will destroy all previous contents of
the disk.

The cylinder number is a ten-bit quantity (0 through
1023). Its most significant two bits are in bits 7
and 6 of CL; the remaining eight bits are in CH.

If an error is encountered, use Service 0h to reset
the drive and retry the operation.

See also: INT 13h, 01h
See also: INT 13h, 05h
See also: INT 13h, 06h

INT 13h, 07h (7) Format Disk Starting at Cylinder fixed disk