INT 13 - XBIOS - COMMAND                                                        
	AX = E000h
	CX = 0
	DL = drive number (80h,81h,82h,83h)
	ES:BX = pointer to XBIOS Command Block (see #00297)
Return: CF clear if successful
	    CX = 1234h XBIOS Signature
	CF set on error
Program: XBIOS is a driver in some versions of Disk Manager that is
	  loaded from the disk MBR, replacing the ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. 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. disk support
	  e.g. adding LBA mode support, and read/write multiple.
SeeAlso: AH=F9h"SWBIOS"


Format of XBIOS Command Block:
Offset	Size	Description	(Table 00297)
 00h	BYTE	function
		0Eh Get XBIOS Configuration Information
		    Return: buffer points to Ontrackr_Ref_Data structure
			(see #00298)
 01h	BYTE	reserved (must be zero before function call)
 02h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	buffer pointer - Input or output depending on opcode
SeeAlso: #00298,#00299


Format of Ontrackr_Ref_Data structure:
Offset	Size	Description	(Table 00298)
 00h	WORD	Size of structure (33h)
 02h	BYTE	VxDA virtual device driver for Windows 3.x or 95.	So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. Chain mode
 03h 12 BYTEs	Drive 1: Ontrackr_VxD_Data structure (see #00299)
 0Fh 12 BYTEs	Drive 2: Ontrackr_VxD_Data structure
 1Bh 12 BYTEs	Drive 3: Ontrackr_VxD_Data structure
 27h 12 BYTEs	Drive 4: Ontrackr_VxD_Data structure (see #00299)
SeeAlso: #00297,#00299


Format of Ontrackr_VxD_Data structure:
Offset	Size	Description	(Table 00299)
 00h	BYTE	INT 13h drive number
 01h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	Delta skew value
 05h	BYTE	Physical  heads (Word 3 of Identify Data)
 06h	BYTE	Physical sectors per track (Word 6 of Identify Data)
 07h	BYTE	Multiple Block Size (Blocking factor)
 08h	BYTE	Read/Write Multiple disable flags
		00001000b	drive supports r/w multiple
		00000100b	do not use read multiple
		00000010b	do not use write multiple
 09h	WORD	Base port address (1F0/170)
 0Bh	BYTE	Hardware interrupt channel (14/15)
SeeAlso: #00298