INT 13 - DISK - WRITE DISK SECTOR(S)           
	AH = 03h
	AL = number of sectors to write (must be nonzero)
	CH = low eight bits of cylinder number
	CL = sector number 1-63 (bits 0-5)
	     high two bits of cylinder (bits 6-7, hard disk only)
	DH = head number
	DL = drive number (bit 7 set for hard disk)
	ES:BX -> data buffer
Return: CF set on error
	CF clear if successful
	AH = status (see #00234)
	AL = number of sectors transferred
	      (only valid if CF set for some BIOSes)
Notes:	errors on a floppy may be due to the motor failing to spin up quickly
	  enough; the write should be retried at least three times, resetting
	  the disk with AH=00h between attempts
	most BIOSes support "multitrack" writes, where the value in AL
	  exceeds the number of sectors remaining on the track, in which
	  case any additional sectors are written beginning at sector 1 on
	  the following head in the same cylinder; the CONFIG.SYS command
	  MULTITRACK can be used to force DOS to split disk accesses which
	  would wrap across a track boundary into two separate calls
	the IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. ATIBM PC AT BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. and many other BIOSes use only the low four bits of
	  DH (head number) since the WD-1003 controller which is the standard
	  ATIBM PC AT controller (and the controller that IDE(Integrated Drive Electronics) A type of disk drive interface which essentially extends the PCIBM PC's expansion bus all the way to the drive and places the drive controller on the disk drive itself.	 See also ESDI. emulates) only supports
	  16 heads
	AWARD ATIBM PC AT BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. and AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. 386sx BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. have been extended to handle more
	  than 1024 cylinders by placing bits 10 and 11 of the cylinder number
	  into bits 6 and 7 of DH
	under Windows95, an application must issue a physical volume lock on
	  the drive via INT 21/AX=440Dh before it can successfully write to
	  the disk with this function
SeeAlso: AH=02h,AH=0Bh,AH=07h"V10DISK.SYS",AH=22h"PSIBM PS/2, any model/1",AH=43h"IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911."
SeeAlso: INT 21/AX=440Dh"DOS 3.2+",INT 4D/AH=03h