C / C++ / MFC

TPartEntry = record
	boot_ind    : Byte;		// 0x80 - active
	head        : Byte;		// starting head
	sector      : Byte;		// starting sector
	cyl         : Byte;		// starting cylinder
	sys_ind     : Byte;		// What partition type
	end_head    : Byte;		// end head
	end_sector  : Byte;	   // end sector
	end_cyl     : Byte;		// end cylinder
	start_sect  : UINT;	   // starting sector counting from 0
	nr_sects    : UINT;  	// nr of sectors in partition
  end;

  TDiskTable = record
   Data  : array[1..446] of Char;
   Table : array[1..4] of TPartEntry;
   Signature : WORD;
  end;

typedef struct tagPARTENTRY
{
	BYTE		bBoot;	 	// 0x80
	BYTE		bHead;	 	// starting head
	BYTE		bSector; 	// starting sector
	BYTE		bCyl;	 	// starting cylinder
	BYTE		bSysInd; 	// What partition type
	BYTE		bEndHead; 	// end head
	BYTE		bEndSector;     // end sector
	BYTE		bEndCyl; 	// end cylinder
	UINT		unStartSect;    // start sector starting from 0
	UINT		unNumSects;     // number of sectors in partition
} PARTENTRY;

typedef struct tagDISKTABLE
{
	CHAR		cData[446];
	PARTENTRY 	tTable[4];
	WORD		wSignature;
} DISKTABLE;