INT 13 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions - EXTENDED READ
	AH = 42h
	DL = drive number
	DS:SI -> disk address packet (see #00272)
Return: CF clear if successful
	    AH = 00h
	CF set on error
	    AH = error code (see #00234)
	    disk address packet's block count field set to number of blocks
	      successfully transferred
SeeAlso: AH=02h,AH=41h"INT 13 Ext",AH=43h"INT 13 Ext"


Format of disk address packet:
Offset	Size	Description	(Table 00272)
 00h	BYTE	size of packet (10h or 18h)
 01h	BYTE	reserved (0)
 02h	WORD	number of blocks to transfer (max 007Fh for Phoenix EDD)
 04h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> transfer buffer
 08h	QWORD(quad-word) Eight bytes.  See also DWORD, PWORD.	starting absolute block number
		(for non-LBA devices, compute as
		  (CylinderThe set of concentric tracks of data located at the same position on each data-bearing surface of the disk. A double-sided floppy will contain two tracks per cylinder.*NumHeads + SelectedHead) * SectorPerTrack +
		  SelectedSector - 1
 10h	QWORD(quad-word) Eight bytes.  See also DWORD, PWORD.	(EDD-3.0, optional) 64-bit flat address of transfer buffer;
		  used if DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. at 04h is FFFFh:FFFFh