BIOS / Int / Int 13 / 04

                        INT 13 - DISK - VERIFY SECTORS

Input			Output
AX	04h	Hash Sectors	Status	Sectors Verified	AX
					BX
CX	Track Number	Sector			CX
DX	Head	Drive			DX
ES:BX	Buffer Address		Set if Error		CF

    For hard disks, the top 2 bits in CL are bits 8 & 9 of the track number.

Status: See function 01h