INT 13 - Ontrack Drive Rocket - SET CYLINDER OFFSET                             
	AH = EFh
	CX = cylinder offset for next INT 13 call
	DL = drive number (80h, 81h)
Return: CF clear
	    AH = 00h
Program: Drive Rocket is a drive accelerator by Ontrack Computer Systems for
	  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. drives supporting the read multiple and write multiple commands
Desc:	the following INT 13 call will add the number given by this call to
	  the specified cylinder to get the actual cylinder number, then reset
	  the offset to zero
Note:	this function is also supported by the NOW! disk cache, and presumably
	  newer versions of SWBIOS and Disk Manager
	for software which supports this call, AH=EEh is equivalent to calling
	  this function with CX=0400h
	the cylinder offset is reset to 0 by all INT 13 called except AH=EEh
	  and AH=EFh
SeeAlso: AX=7B00h