INT 13 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions - GET DRIVE PARAMETERS
	AH = 48h
	DL = drive (80h-FFh)
	DS:SI -> buffer for drive parameters (see #00273)
Return: CF clear if successful
	    AH = 00h
	    DS:SI buffer filled
	CF set on error
	    AH = error code (see #00234)
BUGS:	several different Compaq BIOSes incorrectly report high-numbered
	  drives (such as 90h, B0h, D0h, and F0h) as present, giving them the
	  same geometry as drive 80h; as a workaround, scan through disk
	  numbers, stopping as soon as the number of valid drives encountered
	  equals the value in 0040h:0075h
	Dell machines using PhoenixBIOS 4.0 Release 6.0 fail to correctly
	  handle this function if the flag word at DS:[SI+2] is not 0000h
	  on entry
SeeAlso: AH=08h,AH=41h,AH=49h,MEM 0040h:0075h


Format of IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions drive parameters:
Offset	Size	Description	(Table 00273)
 00h	WORD	(call) size of buffer
		    (001Ah for v1.x, 001Eh for v2.x, 42h for v3.0)
		(ret) size of returned data
 02h	WORD	information flags (see #00274)
 04h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	number of physical cylinders on drive
 08h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	number of physical heads on drive
 0Ch	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	number of physical sectors per track
 10h	QWORD(quad-word) Eight bytes.  See also DWORD, PWORD.	total number of sectors on drive
 18h	WORD	bytes per sector
---v2.0+ ---
 1Ah	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> EDD configuration parameters (see #00278)
		FFFFh:FFFFh if not available
---v3.0 ---
 1Eh	WORD	signature BEDDh to indicate presence of Device Path info
 20h	BYTE	length of Device Path information, including signature and this
		  byte (24h for v3.0)
 21h  3 BYTEs	reserved (0)
 24h  4 BYTEs	ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. name of host bus ("ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT.  See also EISA." or "PCI")
 28h  8 BYTEs	ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. name of interface type
		"ATA"
		"ATAPI"
		"SCSI(Small Computer Systems Interface) A system-independent expansion bus typically used to connect hard disks, tape drives, and CD-ROMs to a computer.	A host adapter connects the SCSI bus to the computer's own bus.  See also ESDI, IDE."
		"USBsee Universal Serial Bus"
		"1394" IEEE 1394 (FireWire)
		"FIBRE" Fibre Channel
 30h  8 BYTEs	Interface Path (see #00275)
 38h  8 BYTEs	Device Path (see #00276)
 40h	BYTE	reserved (0)
 41h	BYTE	checksum of bytes 1Eh-40h (two's complement of sum, which makes
		  the 8-bit sum of bytes 1Eh-41h equal 00h)
Note:	if the size is less than 30 on call, the final DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. will not be
	  returned by a v2.x implementation; similarly for the Device Path info
SeeAlso: #00277,#03196


Bitfields for IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions information flags:
Bit(s)	Description	(Table 00274)
 0	DMAsee Direct Memory Access boundary errors handled transparently
 1	cylinder/head/sectors-per-track information is valid
 2	removable drive
 3	write with verify supported
 4	drive has change-line support (required if drive >= 80h is removable)
 5	drive can be locked (required if drive >= 80h is removable)
 6	CHS information set to maximum supported values, not current media
 15-7	reserved (0)
Note:	bits 4-6 are only valid if bit 2 is set
SeeAlso: #00273


Format of EDD v3.0 Interface Path:
Offset	Size	Description	(Table 00275)
---ISA---
 00h	WORD	16-bit base address
 02h  6 BYTEs	reserved (0)
---PCI---
 00h	BYTE	PCI bus number
 01h	BYTE	PCI device number
 02h	BYTE	PCI function number
 03h  5 BYTEs	reserved (0)
SeeAlso: #00273,#00276


Format of EDD v3.0 Device Path:
Offset	Size	Description	(Table 00276)
---ATA---
 00h	BYTE	flag: 00h = master, 01h = slave
 01h  7 BYTEs	reserved (0)
---ATAPI---
 00h	BYTE	flag: 00h = master, 01h = slave
 01h	BYTE	logical unit number
 02h  6 BYTEs	reserved (0)
---SCSI---
 00h	BYTE	logical unit number
 01h  7 BYTEs	reserved (0)
---USB---
 00h	BYTE	to be determined
 01h  7 BYTEs	reserved (0)
---IEEE1394---
 00h	QWORD(quad-word) Eight bytes.  See also DWORD, PWORD.	64-bit FireWire General Unique Identifier (GUID)
---FibreChannel---
 00h	QWORD(quad-word) Eight bytes.  See also DWORD, PWORD.	Word Wide Number (WWN)
SeeAlso: #00273,#00275


Format of Phoenix Enhanced Disk Drive Spec translated drive parameter table:
Offset	Size	Description	(Table 00277)
 00h	WORD	number of cylinders
 02h	BYTE	number of heads
 03h	BYTE	A0h (signature indicating translated table)
 04h	BYTE	number of physical sectors per track
 05h	WORD	starting write precompensation cylinder number
 07h	BYTE	reserved
 08h	BYTE	control byte (see #03198 at INT 41"DISK 0")
 09h	WORD	number of physical cylinders
 0Bh	BYTE	number of physical heads
 0Ch	WORD	cylinder number of landing zone
 0Eh	BYTE	number of logical sectors per track
 0Fh	BYTE	checksum
Program: the Phoenix Enhanced Disk Drive Specification is an addition to the
	  IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 extensions
SeeAlso: #00278,#03196


Format of Phoenix Enhanced Disk Drive Spec Fixed Disk Parameter Table:
Offset	Size	Description	(Table 00278)
 00h	WORD	physical I/O port base address
 02h	WORD	disk-drive control port address
 04h	BYTE	drive flags (see #00279)
 05h	BYTE	proprietary information
		bits 7-4 reserved (0)
		bits 3-0: Phoenix proprietary (used by 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.)
 06h	BYTE	IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. for drive (bits 3-0; bits 7-4 reserved and must be 0)
 07h	BYTE	sector count for multi-sector transfers
 08h	BYTE	DMAsee Direct Memory Access control
		bits 7-4: DMAsee Direct Memory Access type (0-2) as per ATA-2 specification
		bits 3-0: DMAsee Direct Memory Access channel
 09h	BYTE	programmed I/O control
		bits 7-4: reserved (0)
		bits 3-0: PIO type (1-4) as per ATA-2 specification
 0Ah	WORD	drive options (see #00280)
 0Ch  2 BYTEs	reserved (0)
 0Eh	BYTE	extension revision level (high nybble=major, low nybble=minor)
		(currently 10h for v1.0 and 11h for v1.1-3.0)
 0Fh	BYTE	2's complement checksum of bytes 00h-0Eh
		8-bit sum of all bytes 00h-0Fh should equal 00h
Note:	this structure is also called the Device Paramter Table Extension
	  (DPTE)
SeeAlso: #00277


Bitfields for Phoenix Enhanced Disk Drive Spec drive flags:
Bit(s)	Description	(Table 00279)
 7	reserved (1)
 6	LBA enabled
 5	reserved (1)
 4	drive is slave
 3-0	reserved (0)
SeeAlso: #00278,#00280


Bitfields for Phoenix Enhanced Disk Drive Spec drive options:
Bit(s)	Description	(Table 00280)
 0	fast PIO enabled
 1	fast DMAsee Direct Memory Access access enabled
 2	block PIO (multi-sector transfers) enabled
 3	CHS translation enabled
 4	LBA translation enabled
 5	removable media
 6	ATAPI device (CD-ROM)
 7	32-bit transfer mode
---v1.1+ ---
 8	ATAPI device uses DRQ to signal readiness for packet command
	(must be 0 if bit 6 is 0)
 10-9	translation type (must be 00 if bit 3 is 0)
	00 Phoenix bit-shifting translation
	01 LBA-assisted translation
	10 reserved
	11 proprietary translation
---v3.0---
 11	Ultra DMAsee Direct Memory Access access enabled
 15-12	reserved (0)
SeeAlso: #00278,#00279