.nolist
;********************************************************************************************************************************
;*																																*
;*	File: MBR.inc																												*
;*																																*
;*	This file contains constants and structures related to the Master Boot Record.												*
;*																																*
;*	It was written for MASM, but shouldn't be too difficult to adapt for other assemblers.										*
;*																																*
;*	The information for this is from many scattered sources, because there is no single great source.							*
;*																																*
;*	Authors:																													*
;*		- Neil G. Dickson																										*
;*																																*
;********************************************************************************************************************************

.radix	16
MBR_ENTRY0_OFFSET			equ	1BE
MBR_ENTRY1_OFFSET			equ	1CE
MBR_ENTRY2_OFFSET			equ	1DE
MBR_ENTRY3_OFFSET			equ	1EE

MBR_PARTITION_ACTIVE		equ	80	;active=bootable

MBR_PARTTYPE_DISABLED		equ	00	;means that the entry is not present
MBR_PARTTYPE_FAT12			equ	01
MBR_PARTTYPE_XENIX_ROOT		equ	02	;probably obsolete
MBR_PARTTYPE_XENIX_USR		equ	03	;obsolete
MBR_PARTTYPE_FAT16S			equ	04	;for <32MB
MBR_PARTTYPE_EXTENDED		equ	05	;this is an extended partition to store extra logical partitions (only start location used in entry)
									;comments below, about MBR_PARTTYPE_EXTENDED_LBA apply here too
MBR_PARTTYPE_FAT16L			equ	06	;for >=32MB
MBR_PARTTYPE_OS2_HPFS		equ	07	;these 4 conflict
MBR_PARTTYPE_NTFS			equ	07	;these 4 conflict
MBR_PARTTYPE_ADVANCED_UNIX	equ	07	;these 4 conflict
MBR_PARTTYPE_QNX			equ	07	;these 4 conflict
MBR_PARTTYPE_OS2_BOOT		equ	0A
MBR_PARTTYPE_FAT32			equ	0B
MBR_PARTTYPE_FAT32_LBA		equ	0C
MBR_PARTTYPE_FAT16L_LBA		equ	0E	;for >=32MB
MBR_PARTTYPE_EXTENDED_LBA	equ	0F	;format for 1st sector of partition is same as that of MBR (except empty up until MBR_ENTRY0_OFFSET, where table starts)
									;an extended partition can contain an extended partition
MBR_PARTTYPE_HIDDEN_FAT16L	equ	16	;for >=32MB
MBR_PARTTYPE_HIDDEN_NTFS	equ	17
MBR_PARTTYPE_LINUX_SWAP		equ	82
MBR_PARTTYPE_EXT2			equ	83	;these 3 partly conflict (all are "Linux Native")
MBR_PARTTYPE_EXT3			equ	83	;these 3 partly conflict (all are "Linux Native")
MBR_PARTTYPE_REISER			equ	83	;these 3 partly conflict (all are "Linux Native")
									;apparently a few other Linux filesystems use this number
;many more, but I don't care about most of them: Ralf Brown's Interrupt List contains a very large list of them


PARTITIONENTRY	struct
	IsBootable		byte	?	;80h if bootable, else 00h
	FirstDH			byte	?	;CHS format for INT13h
	FirstCL			byte	?	;
	FirstCH			byte	?	;
	PartitionType	byte	?
	LastDH			byte	?	;CHS format for INT13h
	LastCL			byte	?	;
	LastCH			byte	?	;
	FirstSector		dword	?	;LBA format
	NumSectors		dword	?
PARTITIONENTRY	ends
.radix	10
.list