Interrupt 13h	Disk I/O - access the disk drives (floppy and hard disk)
(0:004Ch)	does not try rereading disk if an error is returned
			                 
Int Function	Description
---------==-	---------------------------------------------------------------
Int\13f\00	Reset - reset the disk controller chip
Int\13f\01	Get Status of disk system
Int\13f\02	Read Sectors - read one or more sectors from diskette
Int\13f\03	Write Sectors - write from memory to disk
Int\13f\04	Verify - verify that a write operation was successful
Int\13f\05	Format Track - write sector ID bytes for 1 track
Int\13f\06	Hard Disk - format track and set bad sector flags
Int\13f\07	Hard Disk - format the drive starting at the desired track
Int\13f\08	Read Drive Parameters		  (XT, CONV, AT, XT/286, PS/2)
Int\13f\09	Init Two Fixed Disk Base Tables   (XT, AT, XT/286, PS/2)
Int\13f\0A	Read Long   (Hard disk) 	  (XT, AT, XT/286, PS/2)
Int\13f\0B	Write Long			  (XT, AT, XT/286, PS/2)
Int\13f\0C	Seek To Cylinder		  (except PC, PCjr)
Int\13f\0D	Alternate Disk Reset		  (except PC, PCjr)
Int\13f\0E	Read Sector Buffer		  (XT, Portable PS/2)
Int\13f\0F	Write sector buffer		  (XT, Portable)
Interrupt 13h	Disk I/O - access the disk drives (floppy and hard disk)
(0:004Ch)	does not try rereading disk if an error is returned
			                 
Int Function	Description
---------==-    ---------------------------------------------------------------
Int\13f\10	Test For Drive Ready
Int\13f\11	Recalibrate Drive
Int\13f\12	Controller RAM Diagnostic	  (XT, Portable, PS/2)
Int\13f\13	Drive Diagnostic		  (XT, Portable)
Int\13f\14	Controller Internal Diagnostic	  (AT, XT/286)
Int\13f\15	Get Disk Type			  (except PC and XT)
Int\13f\16	Change of Diskette Status	  (except PC and XT)
Int\13f\17	Set Diskette Type for Format	  (except PC and XT)
Int\13f\18	Set Media Type For Diskette Format(AT, XT/286, PS/2)
Int\13f\19	Park Hard Disk Heads		  (XT/286, PS/2)
Int\13f\1A	ESDI Hard Disk - Format 	  (PS/2)