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source: trunk/bootcode/airboot.asm@ 160

Last change on this file since 160 was 145, checked in by Ben Rietbroek, 8 years ago

Moved updating the MBR after 'PRECRAP' has finished [v1.1.1-testing]

CAUTION:
This is a testbuild !
AirBoot uses the BIOS to access disks and a small coding error can trash
partition tables or other vital disk structures. You are advised to make
backups of TRACK0 and EBRs before using this testbuild. More info at:
https://rousseaux.github.io/netlabs.air-boot/pdf/AirBoot-v1.1.0-manual.pdf

File size: 97.5 KB

Rev	Line
[40]	1	;
[29]	2	; AiR-BOOT (c) Copyright 1998-2008 M. Kiewitz
	3	;
	4	; This file is part of AiR-BOOT
	5	;
	6	; AiR-BOOT is free software: you can redistribute it and/or modify it under
	7	; the terms of the GNU General Public License as published by the Free
	8	; Software Foundation, either version 3 of the License, or (at your option)
	9	; any later version.
	10	;
	11	; AiR-BOOT is distributed in the hope that it will be useful, but WITHOUT ANY
	12	; WARRANTY: without even the implied warranty of MERCHANTABILITY or FITNESS
	13	; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
	14	; details.
	15	;
	16	; You should have received a copy of the GNU General Public License along with
	17	; AiR-BOOT. If not, see <http://www.gnu.org/licenses/>.
	18	;
[7]	19
[36]	20
[51]	21
	22
	23
	24
	25
	26	;##############################################################################
[46]	27	; AiR-BOOT / DEFINITIONS
[51]	28	;##############################################################################
[7]	29
[46]	30	;
	31	; Include AiR-BOOT Version Information.
[51]	32	; This version-info is defined using simpel EQU's so it can serve as a
	33	; single source for other formats. The AiR-BOOT signature and the
	34	; OS/2 BLDLEVEL use this basic version information.
[46]	35	;
[70]	36	include ../include/version.inc
[30]	37
[46]	38	;
	39	; Include OS/2 BLDLEVEL Information.
[51]	40	; It uses the version-information in VERSION.INC to build it's signature.
[46]	41	;
[60]	42	include bldlevel.inc
[46]	43
[51]	44	;
	45	; Include some macro's.
	46	; This file contains the ORIGIN macro that is used to detect overlaps.
	47	;
[60]	48	include ../include/asm.inc
[46]	49
[51]	50
[30]	51	; We actually don't want to use this directive because it generates extra
	52	; NOP instructions that we can do without.
[31]	53	; TASM also has a bug in that when the .ERR2 directive is used when
	54	; the .386 directive is in effect, the JUMPS directive is also active
	55	; and cannot be turned off.
[30]	56	; NOJUMPS seems to have no effect in this situation.
	57	; In this case 4 NOP instructions are generated after forward referencing jump
	58	; instructions, to allow for automatic recoding by TASM.
	59	; This seems to be a TASM bug. (v2,v3,v4, dunno v5)
[43]	60	IFDEF TASM
	61	;~ JUMPS
	62	ENDIF
[30]	63
[51]	64
[30]	65	;
	66	; If defined then each module is prefixed with it's name.
[51]	67	; This is used for debugging purposes but it also increases code space.
[30]	68	; It should be off in release code.
	69	;
[51]	70	;~ MODULE_NAMES EQU
[30]	71
	72
	73
[51]	74	; -----------------------------------------------------------------------------
	75	; DEBUG
	76	; -----------------------------------------------------------------------------
[30]	77
[31]	78	;
[51]	79	; Enable this to include Debug Modules and enable COM-port debugging.
	80	; To have room for the debug-code, the FX-code can only be enabled
	81	; when AUX_DEBUG is not defined.
[45]	82	;
[71]	83	AUX_DEBUG EQU
[45]	84
[51]	85	;
	86	; To have FX enabled, make sure FX_ENABLE is defined.
	87	; There is no need (for now) to remove Cooper Bars from the setup-menu
	88	; because AiR-BOOT does not crash when enabling Cooper Bars while FX
	89	; is not compiled in. Only TAB to post-screen does not work.
	90	; Way to go Martin !
	91	;
	92	IFNDEF AUX_DEBUG
	93	FX_ENABLED EQU
	94	ENDIF
[45]	95
	96
	97
[51]	98	; -----------------------------------------------------------------------------
	99	; AUX
	100	; -----------------------------------------------------------------------------
[45]	101	;
[31]	102	; bits 7-5 = datarate
	103	; (000=110,001=150,010=300,011=600,100=1200,101=2400,110=4800,111=9600 bps)
	104	; bits 4-3 = parity
	105	; (00 or 10 = none, 01 = odd, 11 = even)
	106	; bit 2 = stop-bits
	107	; (set = 2 stop-bits, clear = 1 stop-bit)
	108	; bits 1-0 = data-bits
	109	; (00 = 5, 01 = 6, 10 = 7, 11 = 8)
	110	;
[30]	111
[31]	112	; 9600 bps, no parity, 1 stop-bit, 8 bits per char
[43]	113	AUX_INIT_PARMS EQU 11100011b
[31]	114
[43]	115	; Com-port for debugging, 0 is disabled
	116	BIOS_COM_PORT EQU 1
	117
[31]	118	; Default word value for BIOS_AuxParms variable
	119	; Note that is has moved since v1.07
[43]	120	BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
[31]	121
[78]	122	; Default byte value for BIOS_BootDisk variable
[77]	123	BIOS_BOOTDISK_DEFAULT EQU 80h
[43]	124
	125
	126
[51]	127	; -----------------------------------------------------------------------------
	128	; LABELS
	129	; -----------------------------------------------------------------------------
	130	; Address labels after code-move
[76]	131	BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
	132	BootBasePtr equ 0h ; We put our MBR to this location
[51]	133	BootBaseExec equ BootBasePtr+offset MBR_RealStart
[76]	134	StackSeg equ 07000h ; Put the stack below the code
	135	StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
	136	StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
[7]	137
	138
[30]	139
[51]	140	; -----------------------------------------------------------------------------
	141	; VIDEO
	142	; -----------------------------------------------------------------------------
[30]	143	; Video pages, no INT 10h is used for menu-drawing etc.
[7]	144	VideoIO_Page0 equ 0B800h
	145	VideoIO_Page1 equ 0B900h
	146	VideoIO_Page2 equ 0BA00h
	147	VideoIO_Page4 equ 0BC00h
	148	VideoIO_FXSegment equ 0A000h
	149
[30]	150	; Special line-drawing characters
[69]	151	TextChar_WinLineRight equ 0C4h
	152	TextChar_WinLineDown equ 0B3h
	153	TextChar_WinRep1 equ 0D1h
	154	TextChar_WinRep2 equ 0C5h
	155	TextChar_WinRep3 equ 0CFh
	156	TextChar_WinRep4 equ 0B5h
	157	TextChar_WinRep5 equ 0C6h
	158	TextChar_WinRep6 equ 0D8h
[7]	159
[51]	160
[128]	161	; -----------------------------------------------------------------------------
	162	; DISK INFORMATION
	163	; -----------------------------------------------------------------------------
	164	; Offsets into the DISKINFO structures located in the array [DiskInformation]
[51]	165
[128]	166	; BIOS disk number and MBR flags
	167	LocDISKINFO_DiskNum equ 00h ; BYTE - BIOS disk number (80h etc)
	168	LocDISKINFO_MbrFlags equ 01h ; BYTE - Valid MBR, etc
	169
	170	; BIOS INT13 Info
	171	LocDISKINFO_I13_Secs equ 02h ; WORD - Max 63
	172	LocDISKINFO_I13_Heads equ 04h ; WORD - Max 16 or 255
	173	LocDISKINFO_I13_Cyls equ 06h ; WORD - Max 1024
	174
	175	; BIOS INT13X Info
	176	LocDISKINFO_I13X_Flags equ 08h ; WORD - CHS valid, etc
	177	LocDISKINFO_I13X_SecSize equ 0ah ; WORD - Normally 512 bytes
	178	LocDISKINFO_I13X_Secs equ 0ch ; DWORD - Max 63 ?
	179	LocDISKINFO_I13X_Heads equ 10h ; DWORD - Max 255 ?
	180	LocDISKINFO_I13X_Cyls equ 14h ; DWORD - Max 2_32 (4294967296)
	181	LocDISKINFO_I13X_SecsLBA equ 18h ; QWORD - Max 2^64 (4294967296^2)
	182	LocDISKINFO_I13X_HostBus equ 20h ; 4 bytes
	183	LocDISKINFO_I13X_Interface equ 24h ; 8 bytes
	184
	185	; OS/2 LVM Info
	186	LocDISKINFO_LVM_Flags equ 2ch ; WORD - OS/2 ext geo, etc
	187	LocDISKINFO_LVM_MasterLBA equ 2eh ; DWORD - Max 254
	188	LocDISKINFO_LVM_Secs equ 32h ; DWORD - Max 255
	189	LocDISKINFO_LVM_Heads equ 36h ; DWORD - Max 255
	190	LocDISKINFO_LVM_Cyls equ 3ah ; DWORD - Max 65536
	191
	192	; Custom Info
	193	LocDISKINFO_Flags equ 3eh ; WORD - Custom flags, dunno yet
	194
	195	; Size of this structure
	196	DISKINFO_Size equ 40h ; Size to be allocated
	197
	198
[51]	199	; -----------------------------------------------------------------------------
	200	; PARTITION TABLE
	201	; -----------------------------------------------------------------------------
	202	; Offsets for Partition-Entries in MBR/EBRs
[37]	203	LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
	204	LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
[51]	205	LocBRPT_BeginCHS equ 1 ; Packed CHS value
	206	LocBRPT_BeginHead equ 1 ; Start head, usually < 16
	207	LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
	208	LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
[37]	209	LocBRPT_SystemID equ 4 ; Type of system using the partition
[51]	210	LocBRPT_EndCHS equ 5 ; Packed CHS value
	211	LocBRPT_EndHead equ 5 ; End head, usually < 16
	212	LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
	213	LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
	214	LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
	215	LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
[7]	216
[51]	217	; Signature relative to start of MBR/EBR
	218	LocBR_Magic equ 510 ; Offset of 0AA55h signature
[7]	219
[128]	220
[51]	221	; -----------------------------------------------------------------------------
	222	; LVM RECORD
	223	; -----------------------------------------------------------------------------
[34]	224	; Used as a quick compare in LVM.ASM
[37]	225	LocLVM_SignatureByte0 equ 02h
[30]	226
[34]	227	; Offsets for LVM Information Sector.
	228	; These are relative to the start of the LVM sector.
[37]	229	LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
	230	LocLVM_CRC equ 08h ; CRC is a DWORD
	231	LocLVM_Heads equ 1ch ; Number of heads
	232	LocLVM_Secs equ 20h ; Sectors per Track
	233	LocLVM_DiskName equ 24h ; Name of the disk
	234	LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
	235	LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
[30]	236
[34]	237	; An LVM info-sector can contain information on max. 4 partitions.
	238	; All 4 entries will be used when there 4 primary partitions defined.
	239	; For logical partitions, the LVM info-sector is located below the start
	240	; of the logical partition and only one LVM entry is used in that logical
	241	; LVM info-sector.
[37]	242	LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
[30]	243
[51]	244
	245	; -----------------------------------------------------------------------------
	246	; LVM ENTRY
	247	; -----------------------------------------------------------------------------
[34]	248	; Offsets for LVM entry.
	249	; These are relative to the start of the entry.
[51]	250	LocLVM_VolumeID equ 00h ; DWORD
	251	LocLVM_PartitionID equ 04h ; DWORD
	252	LocLVM_PartitionSize equ 08h ; DWORD
	253	LocLVM_PartitionStart equ 0ch ; DWORD
[37]	254	LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
	255	LocLVM_Startable equ 11h ; is Startable (newly installed system)
[51]	256	LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
	257	LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
	258	LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
[37]	259
[71]	260	; Truncated to 11 chars when displayed in menu.
[34]	261	; MiniLVM sets both to the same value.
	262	; Also, MiniLVM uses a 0-byte terminator, so the maximum length is 19d.
	263	; Same goes for LocLVM_DiskName.
[45]	264	; These offsets are relative to an LVM entry.
[37]	265	LocLVM_VolumeName equ 14h ; 20 bytes
	266	LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
[30]	267
[45]	268	; LVM constants.
[51]	269	LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
	270	LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
	271	LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
	272	LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
[30]	273
[34]	274
[51]	275	; -----------------------------------------------------------------------------
	276	; AiR-BOOT IPT
	277	; -----------------------------------------------------------------------------
[7]	278	; Offsets for IPT (Internal Partition Table)
[51]	279	LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
[37]	280	LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
	281	LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
	282	LocIPT_Serial equ 0 ; Serial from MBR ?
	283	LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
	284	LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
	285	LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
[51]	286	LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
[37]	287	LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
	288	LocIPT_LocationBegin equ 20 ; Begin of Partition
	289	LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
	290	LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
	291	LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
[7]	292
[38]	293
[30]	294	; AiR-BOOT IPT-Flags
[37]	295	LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
[51]	296	LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
[7]	297
[37]	298	Flags_Bootable equ 00000001b
	299	Flags_VIBR_Detection equ 00000010b
	300	Flags_HideFeature equ 00000100b
	301	Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
[46]	302	Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
[37]	303	Flags_NoPartName equ 01000000b
	304	Flags_NowFound equ 10000000b ; temp only in OldPartTable
	305	Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
[7]	306
[37]	307	FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
	308	FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
	309	FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
	310	FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
[7]	311
[51]	312
	313	; -----------------------------------------------------------------------------
	314	; AiR-BOOT HPT
	315	; -----------------------------------------------------------------------------
	316	; Hidden Partition Table
	317	; Length of an HPT-entry ((45 * 6 bits-per-part) / 8) * 45
	318	; 33.75 = 34 bytes for HPT-entry, coincidently same as length of IPT-entry.
	319	; Packed table !
	320	LocHPT_LenOfHPT equ 34
	321
	322
	323	; -----------------------------------------------------------------------------
	324	; NAVIGATION KEYS
	325	; -----------------------------------------------------------------------------
[30]	326	; Navigation keys
[37]	327	Keys_Up equ 48h
	328	Keys_Down equ 50h
	329	Keys_Left equ 4Bh
	330	Keys_Right equ 4Dh
	331	Keys_PageUp equ 49h
	332	Keys_PageDown equ 51h
	333	Keys_GrayPlus equ 4Eh
	334	Keys_GrayMinus equ 4Ah
	335	Keys_Plus equ 1Bh
	336	Keys_Minus equ 35h
	337	Keys_ENTER equ 1Ch
	338	Keys_ESC equ 1h
	339	Keys_F1 equ 3Bh
	340	Keys_F10 equ 44h
[51]	341	Keys_C equ 2Eh ; Add. Check for Ctrl!
[37]	342	Keys_Y equ 2Ch
	343	Keys_Z equ 15h
	344	Keys_N equ 31h
	345	Keys_TAB equ 0Fh
	346	Keys_Delete equ 53h
	347	Keys_Backspace equ 0Eh
	348	Keys_Space equ 20h
[7]	349
[37]	350	Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
[7]	351
	352
[51]	353	; -----------------------------------------------------------------------------
	354	; MISC
	355	; -----------------------------------------------------------------------------
	356	; Initial value for the FreeDriveletterMap
	357	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	358	; Each partition with an assigned drive-letter clears a bit in this map.
	359	; (Not implemented yet)
	360	InitialFreeDriveletterMap equ 00000011111111111111111111111100b
[46]	361
[51]	362	;
	363	; The first harddisk is BIOS coded 80h.
	364	; This makes a total of 128 disks that could be supported using this coding.
	365	; This value is used to store disk-information and this info is allocated
	366	; in the BSS. 64 disks ought to be enough for everybody :-)
	367	;
	368	MaxDisks equ 64
[46]	369
	370
	371
[51]	372
	373
	374
	375	;##############################################################################
[46]	376	; AiR-BOOT / MAIN-CODE
[51]	377	;##############################################################################
[46]	378
[51]	379	;
[43]	380	; Because of the TASM-bug the processor had to be changed to turn JUMPS
	381	; off. Existing movzx instructions were replaced with 286 equivalent code.
	382	; Out of range relative jumps have been recoded.
[51]	383	;
	384	; Since version 1.0.8, JWasm is the preferred assembler and Tasm will be
	385	; dropped. Also, the chances of AiR-BOOT being used on a 286-machine are
	386	; very slim, so a future version will revert back to .386 and also incorporate
	387	; 32-bit code. This will enable some enhanced constructs such as scaled
	388	; indexing, bit-instructions, 32-bit registers and what not.
	389	;
[43]	390	.286
[30]	391
[51]	392	;
	393	; For Tasm, MODEL is needed for the USES directive to work.
	394	; So always use a model when assembling with Tasm otherwise registers on
	395	; function calls that use USES are not saved and restored.
	396	; The model itself, has no real effect because we generate a binary image
	397	; and not a segmented executable.
	398	; For the other assemblers we define no model to get rid of the default C/C++
	399	; segments for future object-linked versions of AiR-BOOT.
	400	;
[43]	401	IFDEF TASM
[46]	402	;~ .model large, basic
[43]	403	.model tiny,c
	404	ENDIF
[37]	405
	406	;
[51]	407	; The below is used to switch between the original 1-segment (code_seg) layout
	408	; and the new 2-segment (code_seg and bss_data) layout.
	409	; It will be removed in future versions.
[37]	410	; The 2-segment layout was needed for JWasm because it does not treat
[51]	411	; db ? at the end of a code segment as bss-data.
[37]	412	; Therefore, a true BSS segment is now used.
[51]	413	; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
[37]	414	; segment.
	415	; Note that this influences the offsets in the BSS in the list-file and
	416	; the wdis disassembly file (.WDA).
	417	; They are now segment-relative. The true offset is resolved at link
	418	; time.
	419	;
[43]	420	SEGMENTED EQU
[37]	421
[51]	422	IFDEF SEGMENTED
	423	AIRBOOT GROUP LDRIMAGE,VOLATILE
	424	ENDIF
[37]	425
[51]	426	; Our code-segment starts here.
	427	LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
[7]	428
[51]	429	IFDEF SEGMENTED
	430	ASSUME CS:AIRBOOT, DS:AIRBOOT, ES:nothing, SS:nothing
	431	ELSE
	432	ASSUME CS:LDRIMAGE,DS:LDRIMAGE,ES:nothing, SS:nothing
	433	ENDIF
[30]	434
[51]	435
	436
[31]	437	;==============================================================================
[51]	438	; Sector 1
	439	;==============================================================================
[30]	440
[51]	441	;------------------------------------------------------------------------------
[46]	442	; We are not a .COM file at 100h but a BINARY image
	443	; of which only the 1st sector gets loaded at 0000:07c00h
	444	; by the BIOS. The code in this 1st sector is position
	445	; independent and moves itself to a new location at 8000:0000h.
	446	; Then it jumps to a new entry-point and loads the rest of
	447	; the image to the new location.
[51]	448	org 00000h
	449	;------------------------------------------------------------------------------
[30]	450
[46]	451
	452	;
[51]	453	; Since AiR-BOOT is a boot-loader residing in track0, the first 512 bytes
	454	; have the layout of a Master Boot Record (MBR). When AiR-BOOT get's installed,
	455	; the first 512 bytes of this code get's merged with the Partition Table.
	456	; The rest is installed in the remaining sectors with sector 62 (LBA 61)
	457	; being the last sector used by AiR-BOOT. Sector 63 is reserved for IBM LVM.
	458	; The last sector used by AiR-BOOT is a copy of the MBR that AiR-BOOT makes
	459	; every time a system gets booted.
[46]	460	;
[30]	461
[46]	462	;
[51]	463	; Due to the addition of an extra 'I13X' sugnature and code to preserve the
	464	; values of the registers on entry, the MBR-code has become a bit messy.
	465	; This will be cleaned-up in future versions.
	466	;
	467
	468	;
[46]	469	; Martin had a short jump followed by the AiRBOOT signature at first.
	470	; Then he encountered strange behaviour by some M$ operating-systems
	471	; if the the first insruction was not a CLI.
[30]	472	; But there was no room to insert the CLI and of course he did not want to
[51]	473	; change the location of the AiR-BOOT signature.
[30]	474	; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
[51]	475	; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
[46]	476	;
[30]	477
	478
[51]	479	; -----------------------------------------------------------------------------
	480	; FIRST ENTRY-POINT
	481	; -----------------------------------------------------------------------------
[52]	482	; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
[51]	483	; ######################################################
	484	; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
	485	; ######################################################
[37]	486	AiR_BOOT:
[51]	487	; Some M$ operating systems need a CLI
	488	; here otherwise they will go beserk
	489	; and will do funny things during
	490	; boot phase, it's laughable!
	491	MBR_1stOpc: cli
[30]	492
[51]	493	; JMP-Short -> MBR_Start
	494	; Uses the 'A' from the signature as the displacement !
	495	MBR_JmpOpc db 0EBh
[7]	496
[51]	497	; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
	498	;~ db 'AiRBOOT',24h,02h,20h,12h,01h,08h,TXT_LanguageID
	499	MBR_ABSig: InsertAirbootSignature TXT_LanguageID
[37]	500
[51]	501	; Total Code Sectors Count.
	502	; Actual value will be inserted by FIXCODE.
	503	MBR_CodeSecs db 1
[37]	504
[51]	505	; Total Code Sectors Count, dynamically calculated.
	506	;~ db (code_end-$)/512
[37]	507
[51]	508	; Check-Sum for Code
	509	MBR_CheckCode dw 0
[37]	510
	511
	512
[51]	513	; -----------------------------------------------------------------------------
	514	; THIRD ENTRY-POINT
	515	; -----------------------------------------------------------------------------
[52]	516	; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
[30]	517	;
	518	; No single instruction below should be changed, added or removed in the code
	519	; below as this will cause the jump-link to go haywire.
[31]	520	;
[37]	521	MBR_Start:
[51]	522	;
	523	; When we arrive here, no registers have been used yet.
	524	; So, they still contain the values the BIOS left in them.
	525	; We want to preserve those value's for later inspection
	526	; by putting them on the stack.
	527	;
[30]	528
[51]	529	; No space for this instruction here.
	530	; We'll enable interrupts later.
	531	;sti ; This opcode is dedicated to:
	532	; =MICROSOFT JUMP DEPARTMENT=
	533
	534	; Push all registers with values provided by the BIOS
	535	; on the stack.
	536	pusha
	537
	538	;
[37]	539	; Setup some base stuff
	540	; AX got loaded wrongly for debug, changed the instructions
	541	; without modifying the number of bytes.
[51]	542	; Don't comment-out the redundant instruction below because it
[37]	543	; will change the number of bytes and break the jump-chain.
[51]	544	;
	545
	546	; The segment we are moving ourself from (NOT USED)
	547	;mov ax, StartBaseSeg
[37]	548	;mov ds, ax
[51]	549
	550	; Make sure DS points to CS.
[37]	551	push cs
	552	pop ds
[51]	553
	554	; Setup the source and destination for the code move.
	555	mov si, StartBasePtr ; The offset we move ourself from
	556	mov ax, BootBaseSeg ; The target segment we move to
[37]	557	mov es, ax
[51]	558	;mov di, BootBasePtr ; The target offset we move to
	559	; Changed the instruction to make room.
	560	; So, BootBasePtr is not used !
	561	; The offset in the target segment is assumed to be 0000
	562	; anyway.
	563	xor di,di
	564	;sti
[30]	565
[76]	566	; Size of the MBR in words.
[37]	567	mov cx, 256 ; Pre-boot environment
[30]	568
[37]	569	;
[51]	570	; This moves this 512-byte sector, loaded by the BIOS at
	571	; 0000:7c00 to 8000:0000.
[37]	572	;
[51]	573	cld
[37]	574	rep movsw
[30]	575
[77]	576	; Temporary save SS and SP so we still have access to this
	577	; stack after we have setup our own.
	578	mov cx,ss
	579	mov bx,sp
	580
[51]	581	; Code an intersegment jump to the new location.
	582	; jmp BootBaseSeg:BootBaseExec
	583	; Note that DX:BX containts the old SS:SP.
[37]	584	db 0EAh
[46]	585	dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
	586	dw BootBaseSeg ; This is 08000h
[7]	587
[30]	588
[51]	589
	590
	591	; -----------------------------------------------------------------------------
	592	; SIMPLE MBR FUNCTIONS
	593	; -----------------------------------------------------------------------------
[30]	594	;
	595	; Some MBR-functions to provide absolute minimum functionality.
	596	;
	597
	598	;
[52]	599	; BOOKMARK: Halt System
[30]	600	; Entry-point for halting the system.
	601	;
[7]	602	MBR_HaltSystem:
[37]	603	mov ax, 8600h
	604	xor cx, cx
	605	mov dx, 500
[46]	606	int 15h ; Wait to display the whole screen :]
	607	MBR_HaltSys:
[81]	608	;~ cli
[37]	609	jmp MBR_HaltSys
[7]	610
[31]	611
[77]	612	; Base of some MBR variables
[45]	613	ORIGIN 0003Ch
	614
[77]	615	MBR_Variables:
	616
[51]	617	; Comport settings.
	618	; It had to be moved to create room for the double I13X signature.
[37]	619	; It cannot be in the config-area (sector 55)
[43]	620	; because that area is crc-protected and would not allow 'poking'.
	621	BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
[31]	622
[77]	623	; When the BIOS turns over control to the MBR, DL holds the BIOS disk-number
	624	; from which the boot was initiated. This would normally be 80h, corresponding
	625	; to the first physical disk. However, some modern BIOSses can directly boot
	626	; from other disks, so AirBoot cannot assume being loaded from 80h anymore.
	627	; So here we store the BIOS disk-number passed in DL when AirBoot got control.
	628	BIOS_BootDisk db BIOS_BOOTDISK_DEFAULT ; Get overwritten with 'DL'
[51]	629
[77]	630	; Reserved space for future variables.
[51]	631	IFDEF AUX_DEBUG
[77]	632	reserved db 5 dup('X')
[51]	633	ELSE
[77]	634	reserved db 5 dup(0)
[51]	635	ENDIF
[30]	636
[45]	637
[51]	638
	639
	640	; -----------------------------------------------------------------------------
	641	; SECOND ENTRY-POINT
	642	; -----------------------------------------------------------------------------
[77]	643
[37]	644	;
	645	; We arrive here after the first jump using the 'A' of the
[51]	646	; AiR-BOOT signature. So we ensure the jump is always at
	647	; this offset. We jump here, because Martin needed to
	648	; insert a CLI on start and did not want to change the
	649	; AiR-BOOT signature because of Microsoft inventions...
[45]	650	;
	651	ORIGIN 00044h
[37]	652
	653	; Jump again...
[51]	654	; This time to the code that relocates to 8000:0000.
[52]	655	; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
[37]	656	jmp MBR_Start
	657
[30]	658	;
	659	; Entry-point when loading fails.
	660	;
[37]	661	db 'LOAD ERROR!', 0
	662	MBR_LoadError Proc Near
	663	mov si, offset $-12
	664	push cs
	665	pop ds
	666	call MBR_Teletype
	667	MBRLE_Halt:
	668	jmp MBRLE_Halt
	669	MBR_LoadError EndP
[7]	670
[30]	671	;
	672	; Entry-point when saving fails.
	673	;
[37]	674	db 'SAVE ERROR!', 0
	675	MBR_SaveError Proc Near
	676	mov si, offset $-12
	677	push cs
	678	pop ds
	679	call MBR_Teletype
	680	MBRSE_Halt:
	681	jmp MBRSE_Halt
	682	MBR_SaveError EndP
[7]	683
[30]	684
	685	; Put text on the screen using the BIOS tele-type function.
	686	; No attributes like color are supported.
[7]	687	; In: SI - Pointer to begin of string (EOS is 0)
	688	; Destroyed: SI
[37]	689	MBR_Teletype Proc Near Uses ax bx cx
	690	mov ah, 0Eh
	691	mov bx, 7
	692	MBRT_Loop:
	693	lodsb
	694	or al, al
	695	jz MBRT_End
	696	int 10h
	697	jmp MBRT_Loop
	698	MBRT_End:
	699	ret
	700	MBR_Teletype EndP
[7]	701
[30]	702	;
	703	; Rousseau: DO NOT ADD CODE TO THIS SECTION !
	704	;
	705
[52]	706	; In: BX - Base Check
	707	; DS:SI - Pointer to 512-byte-area to be included
	708	; Out: BX - Base Check Result
[7]	709	; Destroyed: SI will get updated (+512)
[37]	710	MBR_GetCheckOfSector Proc Near Uses ax cx
	711	mov cx, 256
	712	MBRGCOS_Loop:
	713	lodsw
	714	xor ax, 0BABEh
	715	xor bx, ax
	716	loop MBRGCOS_Loop
	717	or bx, bx
	718	jnz MBRGCOS_NoFixUp
	719	mov bx, 1 ; dont allow 0, cause 0 == empty
	720	MBRGCOS_NoFixUp:
	721	ret
	722	MBR_GetCheckOfSector EndP
[7]	723
[30]	724
	725
	726
	727
	728
[51]	729	; -----------------------------------------------------------------------------
	730	; ENTRY-POINT OF MOVED CODE
	731	; -----------------------------------------------------------------------------
	732
[30]	733	;
[51]	734	; When we arrive here we are running at 8000:0000.
[77]	735	; CX:BX contains the SS:SP of the old stack.
[30]	736	;
	737
[51]	738	;
	739	; This is where the rest of AiR-BOOT gets loaded from track0.
	740	;
[52]	741	; BOOKMARK: Running at relocated position (Load additional sectors)
[31]	742	;------------------------------------------------------------------------------
[7]	743	MBR_RealStart:
[51]	744	;
	745	; Setup new stack and other segment registers.
	746	;
[37]	747	mov ax, StackSeg ; 07000h, below the moved code
	748	mov ss, ax
	749	mov sp, 7FFEh ; Even is better
[51]	750	push es ; ES holds segment where we moved to
[52]	751	pop ds ; Set DS=ES to Code Segment
[30]	752
[51]	753	;
[77]	754	; Push the old SS:SP which was saved in CX:BX on the new stack.
[51]	755	;
[77]	756	push cx ; Old SS
[51]	757	push bx ; Old SP
[43]	758
[77]	759	;
	760	; Store the BIOS disk-number AirBoot was loaded from.
	761	;
	762	mov [BIOS_BootDisk], dl
[51]	763
[37]	764	; Load the configuration-sectors from disk.
[51]	765	; These are the main configuration sector and the various
	766	; tables that follow it upto but not including the MBR backup.
[77]	767	mov bx, offset Configuration ; Location in RAM
	768	mov cx, 0037h ; Config sector is at 55d
	769	mov al, (MBR_BackUpMBR - Configuration) / 200h
	770	mov ah, 02h
	771	; DL is already loaded with BIOS disk-number
	772	int 13h ; Call BIOS service
[37]	773	jnc MBR_ConfigCopy_NoError
[30]	774
[37]	775	; Some error occured
	776	MBR_ConfigCopy_LoadError:
[77]	777	jmp MBR_LoadError ; Will Abort BootUp
[30]	778
[77]	779	; Load the code-sectors from disk.
	780	; [MBR_CodeSecs] is filled in by the FIXCODE helper that post
	781	; processes the AIRBOOT loader image after it has been built.
[37]	782	MBR_ConfigCopy_NoError:
[77]	783	mov bx, offset FurtherMoreLoad ; Directly after MBR
	784	mov cx, 0002h ; Start at 2nd sector
	785	mov al, [MBR_CodeSecs] ; Number of code sectors
	786	mov ah, 02h ; Read sectors
	787	; DL is already loaded with BIOS disk-number
	788	int 13h ; Call BIOS service
[37]	789	jnc MBR_RealStart_NoError
[31]	790
[77]	791	; Some error occured
	792	jmp MBR_LoadError ; Will Abort BootUp
[31]	793
[77]	794
	795	; I13X Signatures
	796	ORIGIN 000d0h
	797
[37]	798	; [v1.05+]
	799	; Signature for IBM's LVM to detect our "powerful" features ;)
[45]	800	;
[37]	801	; [v1.0.8+]
	802	; Reworked MBR code to be able to create a
	803	; double 'I13X' signature.
	804	; MBR's created with LVM eCS v1.x have the signature at 0d5h
	805	; MBR's created with LVM eCS v2.x have the signature at 0d0h
	806	; See eCS bugtracker issue #3002
[45]	807	;
[37]	808	; Update: These are actually MOV EAX,'X31I' instructions
	809	; in the eCS LVM MBR-code. They are at different places in
[51]	810	; the v1.x and v2.x LVM MBR-code. Other code might depend on
	811	; their presence. Let's protect their location.
[37]	812	db 'I13X',0,'I13X',0
[31]	813
[30]	814
[37]	815	MBR_RealStart_NoError:
	816	; Now Check Code with CheckSum
	817	mov si, offset FurtherMoreLoad
[30]	818
[37]	819	;movzx cx, bptr ds:[10h]
	820	mov cl, ds:[10h]
	821	mov ch,0
[31]	822
[51]	823	; Claculate checksum
[37]	824	xor bx, bx
	825	MBR_RealStart_CheckCodeLoop:
	826	call MBR_GetCheckOfSector
	827	loop MBR_RealStart_CheckCodeLoop
[31]	828
[72]	829	; Verify checksum
[37]	830	cmp MBR_CheckCode, bx
[72]	831	;~ je MBR_RealStart_CheckSuccess ; CRC verified
	832	jmp MBR_RealStart_CheckSuccess ; Ignore CRC
[7]	833
[72]	834	; Oops, checksum mismatch -- halt the system
[37]	835	mov si, offset TXT_ERROR_Attention
	836	call MBR_Teletype
	837	mov si, offset TXT_ERROR_CheckCode
	838	call MBR_Teletype
	839	mov si, offset TXT_ERROR_CheckFailed
	840	call MBR_Teletype
	841	jmp MBR_HaltSystem
[51]	842
	843
	844	;
	845	; OK, all loading went fine so the rest of the code
	846	; is present now, so we jump to it.
	847	; The old SS:SP is still on the stack.
	848	;
[37]	849	MBR_RealStart_CheckSuccess:
	850	jmp AiR_BOOT_Start
[30]	851
	852
	853
	854
[37]	855
[31]	856	;------------------------------------------------------------------------------
[60]	857	include text/txtmbr.asm ; All translateable Text in MBR
[31]	858	;------------------------------------------------------------------------------
[30]	859
[77]	860	; Disk Signature
	861	ORIGIN 001B8h
[30]	862
	863
[37]	864	; Disk Signature
	865	; Note that in an LVM 2.x MBR this collides
	866	; with the dummy PTE that it uses to look for IBM-BM
	867	; on the second harddisk.
[52]	868	; AiR-BOOT installer will merge the field
	869	; from the MBR it replaces.
[51]	870	MBR_DrvSig db 'DSIG'
[31]	871
[45]	872	; Unused word at 01BCh.
	873	; An LVM 2.x MBR puts 0CC33h here.
[52]	874	; AiR-BOOT installer will merge the field
	875	; from the MBR it replaces.
[51]	876	MBR_Spare dw '$$'
[35]	877
	878
[45]	879	; Partition Table.
	880	ORIGIN 001BEh
[43]	881
[45]	882	; The 4 entries just for show.
[52]	883	; AiR-BOOT installer will merge them from the MBR it replaces.
[51]	884	MBR_PartTable:
[37]	885	db 16 dup('0')
	886	db 16 dup('1')
	887	db 16 dup('2')
	888	db 16 dup('3')
	889
	890	; Boot Sigbature
[51]	891	MBR_Sig dw 0aa55h
[37]	892
[30]	893
	894
	895
[37]	896
[45]	897
[51]	898
[31]	899	;==============================================================================
[51]	900	; Sector 2
	901	;==============================================================================
[30]	902
[51]	903	; -----------------------------------------------------------------------------
	904	; FILE-SYSTEM TABLES
	905	; -----------------------------------------------------------------------------
	906
[77]	907	; First sector the rest of the loader image
[45]	908	ORIGIN 00200h
[30]	909
[31]	910	;
	911	; Everything beyond this point is loaded on startup
	912	; and is NOT existant at first
	913	;
[7]	914	FurtherMoreLoad:
[30]	915
	916	;
	917	; Filesystem table correlating id with name.
	918	;
	919
[37]	920	; first Normal-Partition-ID, Hidden-Partition-ID
[51]	921	; and Default-Partition-Flags.
[37]	922	; 01h -> Boot-Able
	923	; 10h -> FAT32 - Name Getting Scheme
	924	; 20h -> No Name To Get (use Partition Name from IPT)
	925	; 40h -> 'L' flag possible
[7]	926	db 'AiRSYS-TABLE'
[37]	927	FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
[29]	928	db 07h, 17h,41h, 08h,017h,21h, 35h,035h,20h,0FCh,017h,41h
	929	db 09h, 19h,11h, 0Bh,01Bh,11h, 0Ch,01Ch,11h,0EBh,0EBh,01h
[7]	930	db 63h, 63h,21h, 81h,081h,21h, 83h,083h,21h, 40h,040h,21h
	931	db 0A5h,0A5h,21h,0A6h,0A6h,21h, 82h,082h,20h,0A7h,0A7h,21h
	932	db 63h, 63h,21h, 4Dh,04Dh,21h, 4Eh,04Eh,21h, 4Fh,04Fh,21h
	933	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	934	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	935	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	936	db 01h, 01h,01h,0FDh,0FDh,20h, 84h,084h,20h,0A0h,0A0h,20h
	937	db 0Ah, 0Ah,20h,0FEh,0FEh,21h,0FFh,0FFh,21h, 00h,000h,21h
	938	db 16 dup (0)
	939
[46]	940	FileSysNames db 'FAT12 ', 'FAT16 ', 'FAT16Big', 'FAT16Big'
	941	db 'HPFS ', 'NTFS ', 'LVM-Data', 'JFS '
	942	db 'FAT32 ', 'FAT32 ', 'FAT32 ', 'BeOS '
	943	db 'Unix ', 'Minix ', 'Linux ', 'Venix ' ; x row ;)
	944	db 'BSD/386 ', 'OpenBSD ', 'LinuxSwp', 'NeXTSTEP'
	945	db 'GNU HURD', 'QNX ', 'QNX ', 'QNX '
	946	db ' ', ' ', ' ', ' '
	947	db ' ', ' ', ' ', ' '
	948	db ' ', ' ', ' ', ' '
	949	db ' ', 'Kernel ', ' ', '0V-Award'
	950	; db 'OS/2 Man', 'via BIOS', 'Floppy ', 'Unknown '
	951	db 'OS2-BMGR', 'via BIOS', 'Floppy ', 'Unknown '
[7]	952	; -> 44 Partition-Types
	953
[30]	954
	955
	956
[37]	957
	958
[51]	959	;==============================================================================
	960	; Sector 3
	961	;==============================================================================
[30]	962
[51]	963	; -----------------------------------------------------------------------------
	964	; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
	965	; -----------------------------------------------------------------------------
[30]	966
[77]	967	; The entry-point jumped to from the MBR code
[51]	968	ORIGIN 00400h
[30]	969
[43]	970
[77]	971	;##############################################################################
	972	;# AiR_BOOT_Start :: This is where the real work begins #
	973	;# -------------------------------------------------------------------------- #
	974	;# At this point, all of AirBoot is loaded, including its configuration. #
	975	;# First, some setup is done, which includes the initialization of variables #
	976	;# in the BSS. After that, disks are scanned for partitions and the required #
	977	;# house keeping is done to incorporate changes from the previous boot. Then #
	978	;# the partition list is prepared and the menu is presented. #
	979	;##############################################################################
[52]	980	; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
[36]	981	AiR_BOOT_Start:
[30]	982
[36]	983
[51]	984	;
	985	; Enable interrupts.
	986	;
	987	sti
[36]	988
	989	;
[51]	990	; Pop the old SS:SP from the stack and save it in the BSS.
[52]	991	; Note that this is outside the normal variable area that gets cleared.
	992	; This allows AiR-BOOT to restart itself when debugging and come-up
	993	; with access to the original values of registers the BIOS passed.
[51]	994	;
	995	pop [OldSP]
	996	pop [OldSS]
	997
[141]	998	; Clear the BSS from its real start just upto the end of the variables.
	999	; Here 'real start' means from where the BSS begins, which is below
	1000	; the point where the first variables are located. The part after
	1001	; the variables is not cleared because that is where the old SS:SP is
	1002	; stored, which is needed for AirBoot restarts during debugging.
	1003	mov bx, offset sobss
	1004	mov cx, offset EndOfVariables - offset sobss
	1005	xor ax, ax
	1006	call FillMemBlock
[51]	1007
[142]	1008	; Initialize the com-port for debugging
	1009	IFDEF AUX_DEBUG
	1010	PUSHRF
	1011	; Init com-port
	1012	call AuxIO_Init
	1013	; Hello message
	1014	mov si, offset [AuxIOHello]
	1015	call AuxIO_Print
	1016	; Show Build Info
	1017	call AuxIO_PrintBuildInfo
	1018	call AuxIO_TeletypeNL
	1019	POPRF
	1020	ENDIF
	1021
	1022	; Dump debug information
	1023	IFDEF AUX_DEBUG
	1024	IF 1
	1025	call DEBUG_Dump1
	1026	ENDIF
	1027	ENDIF
	1028
[117]	1029	; Verify we still got the BIOS disk in DL
	1030	IFDEF AUX_DEBUG
	1031	IF 1
[123]	1032	DBG_TEXT_OUT_AUX '## AiR_BOOT_Start ##'
	1033	PUSHRF
[117]	1034	call DEBUG_DumpRegisters
[123]	1035	POPRF
[77]	1036	ENDIF
[117]	1037	ENDIF
[77]	1038
[117]	1039
[51]	1040	; -----------------------------------------------------------------------------
	1041	; IBM-BM BOOT PREPARATION
	1042	; -----------------------------------------------------------------------------
	1043	;
[36]	1044	; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
	1045	; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
	1046	; signature is required at 3000:0000, FS needs to contain 3000h
	1047	; and the 32-bit LBA address needs to follow the 'I13X' signature.
	1048	; For booting IBM-BM from the second disk, a copy of the MBR of the
	1049	; first disk is also required at 0000:7E00.
	1050	; This information is derived from the eCS 2.x LVM MBR.
	1051	;
	1052	; So, now is a good time to copy the MBR of the first disk to
	1053	; 0000:7E00 in case the partition that will be started is IBM-BM.
	1054	; This copy is located at 8000:0000 and DS already points to this
[51]	1055	; segment. The 'I13X' signature and FS will be setup later.
[36]	1056	;
[37]	1057	pusha ; Save all the general purpose regs
	1058	push es ; We need ES too, so save its value
	1059	xor ax,ax ; Segment 0000h
	1060	mov es,ax ; Make ES point to it
	1061	mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
	1062	mov di,7e00h ; Destination for the MBR for IBM-BM
	1063	mov cx,100h ; 256 words = 512 bytes
	1064	cld ; Direction from low to high
	1065	rep movsw ; Copy the 256 words of the MBR
	1066	pop es ; Restore previous value of ES
	1067	popa ; Restore all the general purpose regs
[36]	1068
	1069
[51]	1070	; -----------------------------------------------------------------------------
	1071	; PRECRAP
	1072	; -----------------------------------------------------------------------------
[36]	1073
[51]	1074	;
	1075	; First it clears the BSS area.
[52]	1076	; Note that the old SS:SP is stored outside this area so this
[51]	1077	; does not get lost.
	1078	; Then initialize various runtime variables and structures.
	1079	;
[52]	1080	; BOOKMARK: Pre Crap
[51]	1081	call PRECRAP_Main
	1082	; Number of harddisks and other system-info is now known.
[43]	1083
[117]	1084	;!
	1085	;! DEBUG_BLOCK
	1086	;! Let's see what the BIOS supplied us with...
	1087	;! Uncomment below to activate.
	1088	;!
	1089	IFDEF AUX_DEBUG
	1090	IF 0
	1091	pushf
	1092	pusha
[45]	1093
[117]	1094	; Print title.
	1095	mov si,offset [bios_reg]
	1096	call AuxIO_Print
	1097	; Save the current stack (SS:SP).
	1098	mov ax,ss
	1099	mov [CurrentSS],ax
	1100	mov [CurrentSP],sp
[30]	1101
[117]	1102	; Restore the old stack.
	1103	mov ss,[OldSS]
	1104	mov sp,[OldSP]
[30]	1105
[117]	1106	; Pop the registers with the BIOS values.
	1107	popa
	1108	; Push them back for AiR-BOOT restart (debug mode).
	1109	pusha
	1110	; Dump them to the serial-port.
	1111	call DEBUG_DumpRegisters
	1112	; Restore the current stack.
	1113	mov ax,[CurrentSS]
	1114	mov ss,ax
	1115	mov sp,[CurrentSP]
[30]	1116
[117]	1117	popa
	1118	popf
	1119	ENDIF
	1120	ENDIF
[30]	1121
[51]	1122
[117]	1123	;!
	1124	;! DEBUG_BLOCK
	1125	;! Dump the registers at this point.
	1126	;!
	1127	IFDEF AUX_DEBUG
	1128	IF 0
	1129	pushf
	1130	pusha
	1131	;~ call DEBUG_DumpRegisters
	1132	;~ call DEBUG_DumpDriveLetters
	1133	;~ call DEBUG_DumpVolumeLetters
	1134	;~ call DEBUG_DumpPartitionXref
	1135	popa
	1136	popf
	1137	ENDIF
	1138	ENDIF
	1139
[145]	1140	; -----------------------------------------------------------------------------
	1141	; UPDATE MBR
	1142	; -----------------------------------------------------------------------------
[144]	1143
[145]	1144	; Write MBR back to disk to sync MBR variables.
	1145	; Otherwise subsequent MBR loads will differ from the RAM stored one,
	1146	; which is used by MBR protection to validate parts of the MBR.
	1147	xor bx, bx ; 0000h - our load address (8000:0000)
	1148	mov cx, 1 ; CHS sector 1, cylinder 0
	1149	xor dh, dh ; CHS head 0
	1150	mov dl, [BIOS_BootDisk] ; The disk we were loaded from
	1151	mov al, 1 ; One sector to write
	1152	mov ah, 03h ; BIOS write disk (legacy)
	1153	int 13h ; Call BIOS
	1154	;!
	1155	;! TODO: Check success
	1156	;! Yes, we should check for errors here, coz it would mean AirBoot
	1157	;! was loaded from a disk where the MBR cannot be written !
	1158	;!
	1159
[51]	1160	; -----------------------------------------------------------------------------
[144]	1161	; SCAN DISKS
[51]	1162	; -----------------------------------------------------------------------------
[77]	1163
[144]	1164	;
	1165	; Scan disks for information like size etc.
	1166	;
	1167	call DriveIO_ScanDisks
[77]	1168
	1169
	1170
[144]	1171	; -----------------------------------------------------------------------------
	1172	; SCAN FOR PARTITIONS
	1173	; -----------------------------------------------------------------------------
[77]	1174
[51]	1175	;
[144]	1176	; Scan disks for partitions
[51]	1177	;
	1178	call PARTSCAN_ScanForPartitions
[144]	1179
	1180	;
[51]	1181	; Internal Partition Table is now populated.
[144]	1182	;
[51]	1183
[144]	1184
[117]	1185	;!
	1186	;! DEBUG_BLOCK
	1187	;! Dump various tables.
	1188	;! Uncomment below to activate.
	1189	;!
	1190	IFDEF AUX_DEBUG
	1191	IF 0
	1192	pushf
	1193	pusha
	1194	;~ call DEBUG_DumpIPT
	1195	;~ call DEBUG_DumpPartitionPointers
	1196	;~ call DEBUG_DumpNewPartTable
	1197	;~ call DEBUG_DumpDriveLetters
	1198	;~ call DEBUG_DumpDriveLetters
	1199	;~ call DEBUG_DumpVolumeLetters
	1200	;~ call DEBUG_DumpPartitionXref
	1201	popa
	1202	popf
	1203	ENDIF
	1204	ENDIF
[49]	1205
[30]	1206
[51]	1207	; -----------------------------------------------------------------------------
	1208	; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
	1209	; -----------------------------------------------------------------------------
	1210
	1211	;
	1212	; Reconnect forced drive-letters to their corresponding
	1213	; partitions.
	1214	;
[52]	1215	; BOOKMARK: Update Driveletters so they are in-sync again
[51]	1216	call PARTSCAN_UpdateDriveLetters
	1217	; Driveletter <-> Partition correlation is now restored.
	1218
	1219
	1220
[117]	1221	;!
	1222	;! DEBUG_BLOCK
	1223	;! Dump various tables.
	1224	;!
	1225	IFDEF AUX_DEBUG
	1226	IF 0
	1227	pushf
	1228	pusha
	1229	;~ call DEBUG_DumpIPT
	1230	;~ call DEBUG_DumpPartitionPointers
	1231	;~ call DEBUG_DumpNewPartTable
	1232	;~ call DEBUG_DumpDriveLetters
	1233	;~ call DEBUG_DumpDriveLetters
	1234	;~ call DEBUG_DumpVolumeLetters
	1235	;~ call DEBUG_DumpPartitionXref
	1236	popa
	1237	popf
	1238	ENDIF
	1239	ENDIF
[51]	1240
	1241
	1242	; -----------------------------------------------------------------------------
	1243	; SHOW WE ARE ALIVE
	1244	; -----------------------------------------------------------------------------
	1245
	1246	;
	1247	; Put some info about AiR-BOOT and the system on the screen.
	1248	;
	1249
[49]	1250	; Display number of physical disks found
[37]	1251	mov si, offset DisksFound
	1252	call MBR_Teletype
	1253	mov al, [TotalHarddiscs]
	1254	call VideoIO_SyncPos
	1255	call VideoIO_PrintByteDynamicNumber
	1256	xor si,si
	1257	call MBR_TeletypeNL
[30]	1258
[49]	1259	; Display number of partitions found
[37]	1260	mov si, offset PartitionsFound
	1261	call MBR_Teletype
	1262	mov al, [CFG_Partitions]
	1263	call VideoIO_SyncPos
	1264	call VideoIO_PrintByteDynamicNumber
[30]	1265
[49]	1266	; Dump summier disk-info for disks found
[37]	1267	xor si,si
	1268	call MBR_TeletypeNL
	1269	call MBR_TeletypeNL
	1270	call VideoIO_SyncPos
	1271	mov dl,80h
	1272	call VideoIO_DumpDiskInfo
[30]	1273
	1274
	1275
	1276
	1277
[51]	1278	; -----------------------------------------------------------------------------
	1279	; eComStation PHASE1 CHECK
	1280	; -----------------------------------------------------------------------------
	1281
	1282	;
[67]	1283	; BOOKMARK: Check for OS/2 being installed
	1284	; Here we check if OS/2 is being installed.
[51]	1285	; If so, we forgo the menu and directly boot it.
	1286	;
	1287
	1288	; If the first byte of the name of the Install Volume is not 0
[49]	1289	; then we potentially have a phase1 boot.
[67]	1290	test byte ptr [OS2_InstallVolume],0ffh
[49]	1291	; Nope, so continue normally.
	1292	jz MBR_Main_ContinueBoot
[36]	1293
[49]	1294	; Setup phase1.
	1295	; It is still possible that a name was set for the
	1296	; Install Volume that does not exist.
	1297	; In that case CY will be clear and AL=0FFh.
	1298	call PART_SetupPhase1
	1299	; Oops, Install Volume not found, continue normally.
	1300	jnc MBR_Main_ContinueBoot
[30]	1301
	1302
[51]	1303	;
[49]	1304	; == Install Volume Found ==
[51]	1305	;
[30]	1306
[51]	1307
[117]	1308	;!
	1309	;! DEBUG_BLOCK
	1310	;! Dump various tables.
	1311	;!
	1312	IFDEF AUX_DEBUG
	1313	IF 0
	1314	pushf
	1315	pusha
	1316	;~ call DEBUG_DumpIPT
	1317	;~ call DEBUG_DumpPartitionPointers
	1318	;~ call DEBUG_DumpPartitionXref
	1319	;~ call DEBUG_DumpNewPartTable
	1320	;~ call DEBUG_DumpDriveLetters
	1321	popa
	1322	popf
	1323	ENDIF
	1324	ENDIF
[51]	1325
	1326
[67]	1327	; BOOKMARK: Scan for Partitions (Only if OS/2 install going on)
[51]	1328	; Because one or more partitions are possibly added, the
	1329	; PartitionXref table is not 'in sync' and could cause the
	1330	; wrong system to be automatically booted.
	1331	; So we rescan all partitions causing the PartitionXref
	1332	; table to be filled with correct values so the auto-boot
	1333	; from the new partition will work correctly.
[49]	1334	call PARTSCAN_ScanForPartitions
[30]	1335
	1336
[117]	1337	;!
	1338	;! DEBUG_BLOCK
	1339	;! Dump various tables.
	1340	;!
	1341	IFDEF AUX_DEBUG
	1342	IF 0
	1343	pushf
	1344	pusha
	1345	;~ call DEBUG_DumpIPT
	1346	;~ call DEBUG_DumpPartitionPointers
	1347	;~ call DEBUG_DumpPartitionXref
	1348	;~ call DEBUG_DumpNewPartTable
	1349	;~ call DEBUG_DumpDriveLetters
	1350	popa
	1351	popf
	1352	ENDIF
	1353	ENDIF
[30]	1354
[51]	1355	; Setup automatic boot to forgo the Menu.
	1356	; PART_SetupPhase1 has filled in the other variables.
	1357	mov byte ptr [CFG_AutomaticBoot],1
[30]	1358
[51]	1359	;
	1360	; At this point the AiR-BOOT configuration has been altered
	1361	; to automatically boot the newly installed system without
	1362	; displaying the menu.
	1363	; Code further down the road will take care of that.
	1364	;
[49]	1365	jmp MBR_Main_ContinueBoot
[30]	1366
	1367
[49]	1368
	1369
[51]	1370	;
	1371	; Wether a new system is being installed or not,
	1372	; booting continues here.
	1373	;
	1374	MBR_Main_ContinueBoot:
[49]	1375
[51]	1376	;
	1377	; Inform user how to switch between post-screen and menu
	1378	; by putting this info on the screen.
	1379	;
[37]	1380	xor si,si
	1381	call MBR_TeletypeNL
	1382	xor si,si
	1383	call MBR_TeletypeNL
	1384	call MBR_TeletypeSyncPos
	1385	xor si,si
	1386	call MBR_TeletypeNL
	1387	call MBR_TeletypeNL
	1388	mov si, offset ShowMenu
	1389	call MBR_TeletypeBold
[30]	1390
	1391
[51]	1392	;
	1393	; Debug stop.
	1394	;
[30]	1395
[37]	1396	;
	1397	; ####################### WAIT FOR KEY ########################
	1398	;
[30]	1399
[37]	1400	; Wait for key so we can see debug log if ab-menu hangs.
[49]	1401	;~ xor ax, ax
	1402	;~ int 16h
[37]	1403	;call SOUND_Beep
[30]	1404
	1405
[51]	1406	; Copy BIOS POST to Second Page
[37]	1407	mov ax, VideoIO_Page1
[51]	1408	call VideoIO_BackUpTo
[30]	1409
[37]	1410	;call SOUND_Beep
[30]	1411
	1412
[52]	1413	; BOOKMARK: Save Configuration
[37]	1414	; Save configuration so phase1 boot-through is disabled
	1415	; on next boot.
[67]	1416	mov byte ptr [OS2_InstallVolume], 0
[37]	1417	call DriveIO_SaveConfiguration
[31]	1418
	1419
	1420
[37]	1421	;
[51]	1422	; See if setup needs to be entered.
[37]	1423	;
	1424	MBR_Main_ReEnterSetup:
	1425	call SETUP_CheckEnterSETUP
[7]	1426
[51]	1427	;
	1428	; Do some post processing.
	1429	;
[52]	1430	; BOOKMARK: After Crap
[37]	1431	call AFTERCRAP_Main
[30]	1432
[37]	1433	MBR_Main_ReEnterBootMenuPre:
	1434	; SetUp PartitionPointers for BootMenu (filter non-bootable)
	1435	call PART_CalculateMenuPartPointers
[7]	1436
[37]	1437	; ...and count that one...
[46]	1438	cmp byte ptr [PartitionPointerCount], 0
[37]	1439	jne MBR_Main_SomethingBootAble
	1440	mov si, offset TXT_NoBootAble
	1441	call MBR_Teletype
	1442	jmp MBR_HaltSystem
[30]	1443
[37]	1444	MBR_Main_SomethingBootAble:
	1445	; FixUp Values, define Timed Setup booting, etc.
	1446	call PART_FixUpDefaultPartitionValues
[7]	1447
[30]	1448
	1449
[37]	1450	; -------------------------------------------------- BOOT-MENU
	1451	MBR_Main_ReEnterBootMenu:
	1452	call BOOTMENU_ResetMenuVars ; reset has to be done
[46]	1453	test byte ptr [CFG_AutomaticBoot], 1
[37]	1454	jz MBR_Main_NoAutomaticBooting
[49]	1455
	1456
[37]	1457	; ------------------------------------------ AUTOMATIC BOOTING
	1458	; Select automatic partition, disable automatic booting for
	1459	; next time and boot system...
[46]	1460	mov byte ptr [CFG_AutomaticBoot], 0
[37]	1461	call PASSWORD_AskSystemPwd
	1462	mov al, Menu_EntryAutomatic
[30]	1463
[37]	1464	;mov al, 2
[30]	1465
[37]	1466	mov Menu_EntrySelected, al ; zero based
	1467	jmp MBR_Main_NoBootMenu
[7]	1468
[30]	1469
[49]	1470	MBR_Main_NoAutomaticBooting:
	1471
[37]	1472	;call SOUND_Beep
[30]	1473
[46]	1474	test byte ptr [CFG_BootMenuActive], 0FFh
[37]	1475	jnz MBR_Main_GotBootMenu
	1476	; ----------------------------------------------- NO BOOT-MENU
	1477	; Select default partition and boot system...
	1478	call PASSWORD_AskSystemPwd
[30]	1479
[37]	1480	;call VideoIO_DBG_WriteString2
[30]	1481
[37]	1482	mov al, Menu_EntryDefault
	1483	;mov al,0 ; zero based
	1484	mov Menu_EntrySelected, al
	1485	jmp MBR_Main_NoBootMenu
[7]	1486
[37]	1487	MBR_Main_GotBootMenu:
	1488	; ------------------------------------------ BOOT-MENU VISUALS
[51]	1489
	1490
	1491	IFDEF FX_ENABLED
[37]	1492	call FX_StartScreen
[51]	1493	ENDIF
[30]	1494
[52]	1495	; BOOKMARK: Build Main Menu
[37]	1496	call BOOTMENU_BuildBackground
	1497	call BOOTMENU_BuildMain
[51]	1498
	1499	IFDEF FX_ENABLED
[37]	1500	call FX_EndScreenRight
[51]	1501	ENDIF
	1502
[37]	1503	call PASSWORD_AskSystemPwd
	1504	call BOOTMENU_ResetTimedBoot
[30]	1505
[52]	1506	; BOOKMARK: Display Main Menu
[37]	1507	call BOOTMENU_Execute
[30]	1508
[37]	1509	jc MBR_Main_ReEnterSetup
	1510	call BOOTMENU_SetVarsAfterMenu
[30]	1511
[37]	1512	; ---------------------------------------------------- BOOTING
	1513	MBR_Main_NoBootMenu:
[51]	1514
	1515	IFDEF FX_ENABLED
[37]	1516	call FX_StartScreen
[51]	1517	ENDIF
	1518
[52]	1519	; BOOKMARK: Display bye-screen and start selected partition
[37]	1520	call BOOTMENU_BuildGoodBye
[51]	1521
	1522	IFDEF FX_ENABLED
[37]	1523	call FX_EndScreenRight
[51]	1524	ENDIF
	1525
[37]	1526	call PASSWORD_AskChangeBootPwd
[7]	1527
[37]	1528	call ANTIVIR_SaveBackUpMBR
[7]	1529
[49]	1530	; Preload the selected menu-entry
[67]	1531	; However, this value will be wrong if OS/2 phase1 is
[49]	1532	; active and the installation partition is newly created.
	1533	; See below for the adjustment.
	1534	mov dl, byte ptr [Menu_EntrySelected]
	1535
[51]	1536
	1537	;
	1538	; Prepare to start the partition.
	1539	;
[49]	1540	jmp MBR_Main_StartPartition
	1541
	1542
	1543
[51]	1544	; -----------------------------------------------------------------------------
	1545	; START PARTITION
	1546	; -----------------------------------------------------------------------------
	1547
[49]	1548	MBR_Main_StartPartition:
	1549
[117]	1550	IFDEF AUX_DEBUG
	1551	IF 0
	1552	pushf
	1553	pusha
	1554	;~ call DEBUG_DumpIPT
	1555	;~ call DEBUG_DumpPartitionPointers
	1556	;~ call DEBUG_DumpPartitionXref
	1557	;~ call DEBUG_DumpNewPartTable
	1558	popa
	1559	popf
	1560	ENDIF
	1561	ENDIF
[49]	1562
	1563
[37]	1564	; -------------------------------------------- START PARTITION
[51]	1565	; THIS DOES NOT RETURN !
[37]	1566	call PART_StartPartition
[30]	1567
	1568
[31]	1569
[51]	1570
[30]	1571	;
[51]	1572	; This entry-point restarts AiR-BOOT almost from scratch.
	1573	; It skips the movement of the MBR but otherwise it is a functional restart.
	1574	; The old BIOS SS:SP where the registers on entry are stored is passed along.
[52]	1575	; This entry-point is used for debugging purposes.
[51]	1576	;
[52]	1577	; BOOKMARK: AiR-BOOT Restart (used for debugging)
[51]	1578	AirbootRestart:
[79]	1579	mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
	1580	mov cx, [OldSS] ; Old SS when BIOS transferred control to AB
	1581	xor dh, dh ; Head 0
	1582	mov dl, [BIOS_BootDisk] ; Disk AirBoot was loaded from
[51]	1583	jmp MBR_RealStart
	1584
	1585
	1586	;
	1587	; This entry-point displays a popup that the system is halted
	1588	; and then halts the system.
	1589	; It is entered on severe error conditions.
	1590	;
[52]	1591	; BOOKMARK: Halt System
[51]	1592	HaltSystem:
	1593	call VideoIO_ClearScreen
	1594	mov ax,0ababh
	1595	mov cx, 0C04h
	1596	mov si, offset SystemHalted
	1597	call SETUP_ShowErrorBox
	1598	; Halt the system.
	1599	jmp MBR_HaltSystem
	1600
	1601
	1602
	1603
	1604
	1605
	1606	;
[52]	1607	; The following section includes various assembler modules
	1608	; at the source level. These contain functionality for a
	1609	; multitude of categories like disk-access, video-io, lvm,
	1610	; debugging, etc. Later versions of AiR-BOOT will use such
	1611	; modules at the object-file level so they can be shared
	1612	; more easily.
[51]	1613	;
	1614
	1615
	1616	; -----------------------------------------------------------------------------
	1617	; INCLUDED FILE SECTION
	1618	; -----------------------------------------------------------------------------
	1619
[52]	1620	; BOOKMARK: Include Section
	1621
[51]	1622	;
[30]	1623	; Include other code-modules here.
	1624	;
[51]	1625
[30]	1626	b_std_txt:
[60]	1627	include regular/std_text.asm ; Standard (non-translateable text)
[30]	1628	size_std_txt = $-b_std_txt
	1629
	1630	b_driveio:
[60]	1631	include regular/driveio.asm ; Drive I/O, Config Load/Save
[30]	1632	size_driveio = $-b_driveio
	1633
[43]	1634	b_lvm:
[60]	1635	include special/lvm.asm ; LVM-specific code
[43]	1636	size_lvm = $-b_lvm
	1637
[30]	1638	b_videoio:
[60]	1639	include regular/videoio.asm ; Video I/O
[30]	1640	size_videoio = $-b_videoio
	1641
	1642	b_timer:
[60]	1643	include regular/timer.asm ; Timer
[30]	1644	size_timer = $-b_timer
	1645
	1646	b_partmain:
[60]	1647	include regular/partmain.asm ; Regular Partition Routines
[30]	1648	size_partmain = $-b_partmain
	1649
	1650	b_partscan:
[60]	1651	include regular/partscan.asm ; Partition Scanning
[30]	1652	size_partscan = $-b_partscan
	1653
	1654	b_bootmenu:
[60]	1655	include regular/bootmenu.asm ; Boot-Menu
[30]	1656	size_bootmenu = $-b_bootmenu
	1657
	1658	b_password:
[60]	1659	include regular/password.asm ; Password related
[30]	1660	size_password = $-b_password
	1661
	1662	b_other:
[60]	1663	include regular/other.asm ; Other Routines
[30]	1664	size_other = $-b_other
[7]	1665
[30]	1666	b_main:
[60]	1667	include setup/main.asm ; The whole AiR-BOOT SETUP
[30]	1668	size_main = $-b_main
	1669
	1670	b_math:
[60]	1671	include regular/math.asm ; Math functions (like 32-bit multiply)
[30]	1672	size_math = $-b_math
	1673
	1674	b_txtother:
[60]	1675	include text/txtother.asm ; All translateable Text-Strings
[30]	1676	size_txtother = $-b_txtother
	1677
	1678	b_txtmenus:
[60]	1679	include text/txtmenus.asm ; All translateable Menu-text
[30]	1680	size_txtmenus = $-b_txtmenus
	1681
	1682	b_charset:
[60]	1683	include text/charset.asm ; Special Video Charsets (if needed)
[30]	1684	size_charset = $-b_charset
	1685
[36]	1686	b_conv:
[60]	1687	include regular/conv.asm ; Various conversion routines
[36]	1688	size_conv = $-b_conv
[30]	1689
	1690	b_virus:
[60]	1691	include special/virus.asm ; Virus Detection / Anti-Virus
[30]	1692	size_virus = $-b_virus
[51]	1693
[30]	1694	b_billsuxx:
[60]	1695	include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
[30]	1696	size_billsuxx = $-b_billsuxx
	1697
	1698	b_sound:
[60]	1699	include special/sound.asm ; Sound
[30]	1700	size_sound = $-b_sound
	1701
	1702	b_apm:
[60]	1703	include special/apm.asm ; Power Managment Support
[30]	1704	size_apm = $-b_apm
	1705
[51]	1706
	1707
	1708	;
	1709	; Cyrillic support.
	1710	;
	1711	IFDEF TXT_IncludeCyrillic
	1712	b_ccharset:
[60]	1713	include special/charset.asm ; Charset Support (e.g. Cyrillic)
[51]	1714	size_ccharset = $-b_ccharset
	1715	ENDIF
	1716
	1717	; Various debugging routines, uses AUXIO and CONV
	1718	IFDEF AUX_DEBUG
	1719	b_debug:
[60]	1720	include regular/debug.asm ; Debug module
[51]	1721	size_debug = $-b_debug
	1722	b_auxio:
[60]	1723	include regular/auxio.asm ; Com-port support for debugging
[51]	1724	size_auxio = $-b_auxio
	1725	ENDIF
	1726
	1727	;
	1728	; We only include this if FX_ENABLED is defined.
	1729	; FX is disabled when debugging to have more room for debug-code.
	1730	; The module compiles to 50eh = 1294 bytes, so that is a lot.
	1731	;
	1732	IFDEF FX_ENABLED
[30]	1733	b_fx:
[60]	1734	include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
[30]	1735	size_fx = $-b_fx
[51]	1736	ENDIF
[30]	1737
	1738
[51]	1739	;
	1740	; End of code marker.
	1741	;
[52]	1742	; BOOKMARK: END OF CODE
[51]	1743	db 'BABE'
	1744	db 'FACE'
[30]	1745
[47]	1746
[51]	1747	; -----------------------------------------------------------------------------
	1748	; END OF CODE
	1749	; -----------------------------------------------------------------------------
	1750	code_end:
	1751
	1752
	1753
	1754
	1755
	1756
	1757
	1758
	1759
	1760
	1761	; -----------------------------------------------------------------------------
	1762	; BLDLEVEL INFORMATION
	1763	; -----------------------------------------------------------------------------
	1764
[52]	1765	; BOOKMARK: BLDLEVEL Information
[51]	1766	ORIGIN 068A0h
	1767
	1768	;
	1769	; The space between this offset and code_end is the space
	1770	; available for code.
	1771	;
	1772	zzz_code_space = $ - code_end
	1773
	1774
[46]	1775	bld_level:
[43]	1776	;
[46]	1777	; Here we insert the OS/2 BLDLEVEL Information.
	1778	; It is composed of the AiR-BOOT version-info and other
[51]	1779	; information. It is unique for each release of AiR-BOOT.
[46]	1780	;
[51]	1781
	1782	;
[47]	1783	; ?? When AUX_DEBUG is enabled and the above org is active,
	1784	; the BLDLEVEL gets corrupted eventhough it gets inserted here
	1785	; explicitly. The effect is almost like an 'OR' or a merge
	1786	; with the already generated FX code.
	1787	; Tasm and JWasm produce different results.
	1788	; ??
	1789	;
[46]	1790	InsertBuildLevel
	1791
[47]	1792
[30]	1793
[7]	1794
	1795
[51]	1796	;==============================================================================
	1797	; Sector 53
	1798	;==============================================================================
	1799
[45]	1800	;
[51]	1801	; From here on, the layout of the image consists of:
	1802	; - AiR-BOOT Protection Image
	1803	; - AiR-BOOT Configuration
	1804	; - DriveLetters
	1805	; - Install Volume
	1806	; - Floppy/CDROM/BIOS BOOT ENTRIES
	1807	; - Internal Partition Table (IPT)
	1808	; - Hidden Partition Table (HPT)
	1809	; - MBR Backup
[45]	1810	;
[7]	1811
[37]	1812	;
[51]	1813	; After that, the BSS follows with several runtime
	1814	; variables and structures.
	1815	; The BSS is not part of the image on disk of course.
	1816	;
	1817
	1818	; -----------------------------------------------------------------------------
	1819	; PROTECTION IMAGE
	1820	; -----------------------------------------------------------------------------
	1821
	1822	;
[52]	1823	; This is the AiR-BOOT MBR Protection Image.
[46]	1824	; The stuff generated here gets overwritten when the
[51]	1825	; MBR_PROT module, which is assembled separately,
	1826	; gets binary merged.
[37]	1827	; So you won't find the string below in the generated binary.
	1828	;
[52]	1829	; BOOKMARK: AiR-BOOT MBR Protection Image
[51]	1830	ORIGIN 06900h
[46]	1831
	1832
[51]	1833
	1834
[46]	1835	;
[51]	1836	; Hardcoded to 768 bytes (MBR_PROT.ASM)
[46]	1837	; The string below is searched for by the FIXCODE helper and must be
[51]	1838	; page (256 bytes) aligned.
[46]	1839	;
[51]	1840	; It seems to be possible to shrink the protection-image to 768 bytes.
	1841	; That gives us an additional 256 bytes of code-space.
	1842	; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
	1843	; Also the granularity needs to change from 512 bytes to 256 bytes since
	1844	; 6900h is not a 512-byte boundary.
	1845	;
	1846	; 20120908 - Done.
	1847	;
[37]	1848	MBR_Protection db 'AiR-BOOT MBR-Protection Image'
	1849
[43]	1850	; Just fill.
[51]	1851	;~ db 1024-($-MBR_Protection) dup('M')
	1852	db 768-($-MBR_Protection) dup('M')
[37]	1853
	1854
[51]	1855
	1856
	1857
	1858
	1859
[31]	1860	;==============================================================================
[51]	1861	; Sector 55
	1862	;==============================================================================
	1863	; -----------------------------------------------------------------------------
	1864	; AiR-BOOT CONFIGURATION
	1865	; -----------------------------------------------------------------------------
[30]	1866
[37]	1867	;
	1868	; This section contains the AiR-BOOT configuration.
	1869	; Note that it has a version that should be updated
	1870	; when stuff is added.
	1871	; Also add stuff to the end so that offsets of other
	1872	; variables remain vaild.
	1873	;
[52]	1874	; BOOKMARK: AiR-BOOT Configuration Sector
[45]	1875	ORIGIN 06C00h
[30]	1876
[37]	1877	Configuration:
[69]	1878	; This is the signature for the AiR-BOOT Configuration.
	1879	; Note that this configuration section, like the code section,
	1880	; is CRC protected. This means that poking values in these
	1881	; sections on the disk will invalidate AiR-BOOT and cause it
	1882	; to halt. This is a protection method against other software
	1883	; modifying stuff in track 0.
	1884	db 'AiRCFG-TABLE',0adh
[55]	1885	db 01h, 10h, 'U' ; "Compressed" ID String
[37]	1886	; Version 1.02 was for code 1.06, 1.03 was internal
	1887	; and 1.04,1.05 and 1.06 do not exist.
[46]	1888	;
	1889	; 1.07 was used with AB v1.07 and introduced the phase1
	1890	; system-name. For the rest it is compatible with v1.02.
	1891	;
	1892	; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
	1893	; of several components and the packing of the hideparttable.
	1894	; The core configuration has not changed but the generated
	1895	; configuration has. The v1.0.8 installer handles upgrading.
	1896	;
[54]	1897	; It has been decided that uneven minor numbers will be
	1898	; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
[60]	1899	;
[37]	1900	; It is not required for the config to have the
	1901	; same version as the code, so in the future
	1902	; the code version might be higher than the
	1903	; config version if there are no changes to the latter.
[46]	1904	;
[7]	1905
[37]	1906	CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
	1907	CFG_LastTimeEditHi dw 0 ; second 16 bit part...
[7]	1908
[37]	1909	CFG_CheckConfig dw 0 ; Check-Sum for Configuration
[7]	1910
[37]	1911	CFG_Partitions db 0 ; Count of partitions in IPT
[51]	1912	CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
[37]	1913	CFG_PartDefault db 0 ; Default-Partition (Base=0)
[7]	1914
[37]	1915	CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
	1916	CFG_TimedBoot db 0 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
	1917	CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
	1918	CFG_TimedDelay dw 123 ; Timed Boot - Delay
	1919	CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
	1920	CFG_RememberBoot db 1 ; Remember Manual Boot Choice
	1921	CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
	1922	CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
	1923	CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
[7]	1924	; v0.29+ -> 2 - Detailed Bootmenu
[37]	1925	CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
	1926	CFG_PasswordSetup db 0 ; Ask Password when entering Setup
	1927	CFG_PasswordSystem db 0 ; Ask Password when booting System
	1928	CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
	1929	CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
	1930	CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
	1931	CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
	1932	CFG_DetectVirus db 0 ; Detect Virus ?
	1933	CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
	1934	CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
	1935	CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
	1936	CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
	1937	dw 07A53h
	1938	dw 0E797h
	1939	dw 0A896h
	1940	CFG_BootPassword dw 0101Fh ; Another CR... ;-)
	1941	dw 07A53h
	1942	dw 0E797h
	1943	dw 0A896h
	1944	db 0 ; Rude-Protection - Removed since v0.28b
	1945	CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
	1946	CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
	1947	; 0 - Do Nothing
	1948	; 1 - Reset Time
	1949	; 2 - Stop Time
	1950	CFG_MakeSound db 0 ; Should be clear ;)
	1951	CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
[51]	1952	CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
[37]	1953	; 0 - Disabled
	1954	; 1 - CD-ROM
	1955	; 2 - Network
	1956	; 3 - ZIP/LS120
	1957	CFG_CooperBars db 0 ; If Cooper Bars should be shown
	1958	CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
	1959	CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
	1960	; FFh -> Disabled
	1961	CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
	1962	CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
	1963	CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
	1964	CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
	1965	CFG_PartAutomatic db 0 ; Partition-No for automatic booting
	1966	CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
	1967	CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
[7]	1968
[30]	1969
	1970	;
	1971	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	1972	;
	1973
[45]	1974	;
	1975	; Drive Letters.
	1976	;
[52]	1977	; BOOKMARK: Stored Drive Letters
[45]	1978	ORIGIN 06CB0h
[30]	1979
	1980
[51]	1981	; -----------------------------------------------------------------------------
	1982	; DRIVE LETTERS
	1983	; -----------------------------------------------------------------------------
	1984
[45]	1985	;
	1986	; Moved here to make room for packed hiddenparttable.
[71]	1987	; This gets filled with drive-letters that are assigned using the dl-feature.
[45]	1988	;
	1989	DriveLetters db LocIPT_MaxPartitions dup (0)
	1990	; Format is:
	1991	;============
	1992	; Drive-Letter : BYTE (80h-C:, 81h-D:)
	1993	; --------------------> 1 Byte * 45
[30]	1994
[51]	1995
	1996
	1997	; -----------------------------------------------------------------------------
	1998	; INSTALL VOLUME
	1999	; -----------------------------------------------------------------------------
	2000
[45]	2001	;
[37]	2002	; Allways have the name of the installation volume
	2003	; at this offset.
	2004	; So future config changes will not break auto-install.
[45]	2005	;
[67]	2006	; BOOKMARK: Name of OS/2 Installation Volume
[45]	2007	ORIGIN 06D00h
[37]	2008
[67]	2009	; SET(A)BOOT stores the volume name of the OS/2 system being installed here.
[31]	2010	; It is truncated to 11 chars because AiR-BOOT currently does not support
	2011	; longer labelnames. The name is also capitalized.
[67]	2012	OS2_InstallVolume db 0,'NOPHASEONE' ,0
[30]	2013
[37]	2014	;
	2015	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2016	;
	2017
[51]	2018
	2019	; -----------------------------------------------------------------------------
	2020	; FLOPPY/CDROM/BIOS BOOT ENTRIES
	2021	; -----------------------------------------------------------------------------
	2022
[37]	2023	;
	2024	; 06DABh - 06C00h = 01ABh = 427 bytes.
	2025	; Entries allocated down from 06E00 boundary.
	2026	;
[52]	2027	; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
[46]	2028	ORIGIN 06DABh ; 427 Boundry
[37]	2029
	2030	; (432 - 5 = 427)
	2031	AutoDrvLetter db 0
	2032	AutoDrvLetterSerial dd 0
	2033
	2034	; This entry is also 34 bytes long (466 - 34 = 432)
	2035	BIOScontIPTentry:
	2036	db 0, 0, 0, 0, ' '
	2037	db 0, 0FEh, Flags_Bootable
	2038	dw 0 ; No Checksum :)
	2039	db 0, 1, 0
	2040	db 0, 1, 0 ; Location of Partition/Boot Record
	2041	dd 0, 0
	2042
[7]	2043	; VIR variables are for the AiR-BOOT Anti Virus Code
	2044	; Most of them are backups of Interrupt Points, so we can check, if a
	2045	; stealth virus is on-line, we can intercept its call.
	2046	; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
[46]	2047	; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
	2048	; system from working, so the user has to press reset.
	2049	; That's saver than a Reboot.
[7]	2050	;
	2051	; If a virus is found on the partition to boot, the system will ONLY halt,
	2052	; nothing more, because we can not remove it. The user shall do it :)
	2053	; Those viruses are detected via a real nasty method...Checksum-Checking of the
	2054	; boot-record, which is to be executed. If it does not match the one in our
	2055	; internal partition table, we will stop. You may however switch this detection
	2056	; off or just reset it by switching 'VIBR Detection'.
	2057
[37]	2058	; 478 - 12 = 466 ; 466 Sub-Part
	2059	CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
	2060	CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
	2061	CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
[30]	2062
[37]	2063	; 478 Boundry (512-34)
	2064	; This entry is also 34 bytes long
	2065	FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
	2066	db 0, 0FFh, Flags_Bootable
	2067	dw 0 ; No Checksum :)
	2068	db 0, 1, 0
	2069	db 0, 1, 0 ; Location of Partition/Boot Record
	2070	dd 0, 0
[30]	2071
	2072
[51]	2073
	2074	; -----------------------------------------------------------------------------
	2075	; INTERNAL PARTITION TABLE (IPT)
	2076	; -----------------------------------------------------------------------------
	2077
[45]	2078	;
	2079	; AiR-BOOT Internal Partition Table (IPT)
	2080	;
[52]	2081	; BOOKMARK: Internal Partition Table
[45]	2082	ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
[30]	2083
	2084
[45]	2085	;
	2086	; Rousseau: This is the start of the AiR-BOOT IPT
	2087	;
	2088	PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
	2089	; no-partitions detected... :]
[7]	2090	; db 1, 0, 0, 0, 'Harddisc 1'
	2091	; db 0, 0FFh, Flags_BootAble
	2092	; dw 0 ; No Checksum :)
	2093	; db 0, 0, 1
[46]	2094	; db 0, 0, 1 ; Location of Partition/Boot Record
[7]	2095	; dd 0, 0
	2096
[37]	2097	; Format is:
	2098	;============
	2099	; SerialNumber * 4
	2100	; PartitionName * 11
	2101	; Drive * 1
	2102	; SystemID * 1 (means the partition type)
	2103	; Flags * 1
	2104	; Checksum * 2 (for virus checking)
	2105	; LocationBegin * 3 (where the partition begins)
	2106	; LocationPartTab * 3 (where the partition table is)
	2107	; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
	2108	; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
	2109	; --------------------> 34 Bytes (total maximum partition-entries = 30)
[7]	2110
[30]	2111
[37]	2112
	2113	; No need to check overlap here because this string will
	2114	; be overwritten if the maximum partition count is reached.
	2115	; So this is not a critical boundary.
[45]	2116	ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
[37]	2117
	2118	db 'AiRBOOTPAR' ; 1K internal partition table
[30]	2119
	2120
	2121
[51]	2122	; -----------------------------------------------------------------------------
	2123	; HIDDEN PARTITION TABLE (HPT)
	2124	; -----------------------------------------------------------------------------
[30]	2125
[45]	2126	;
	2127	; Hidden Partition Table (6-bit packed as of v1.0.8)
	2128	;
[52]	2129	; BOOKMARK: Hidden Partition Table (packed)
[45]	2130	ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
[30]	2131
[38]	2132	HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
[37]	2133	; Format is:
	2134	;============
	2135	; PartitionPtr : BYTE * 30
[38]	2136	; --------------------> 30 Bytes * 45
[30]	2137
[37]	2138	;
[45]	2139	; Driveletters were here.
	2140	; Moved down to make room for packed hideparttable.
	2141	;
[30]	2142
[37]	2143
[45]	2144	;
	2145	; End of hidden partition table.
	2146	; Check overlap here for security reasons.
	2147	;
	2148	ORIGIN % (image_size - 200h - 5)
[30]	2149
[45]	2150	; 79fa - end of packed hide table
	2151	db 'ABHID' ; 1K internal Hide-partition table
[30]	2152
	2153
	2154
	2155
[51]	2156	;==============================================================================
	2157	; Sector 62
	2158	;==============================================================================
	2159	; -----------------------------------------------------------------------------
	2160	; MBR BACKUP
	2161	; -----------------------------------------------------------------------------
[37]	2162
[45]	2163	;
	2164	; AiR-BOOT MBR Backup.
	2165	;
[52]	2166	; BOOKMARK: MBR Backup
[45]	2167	ORIGIN % (image_size - 200h)
[37]	2168
[31]	2169
[46]	2170	MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
	2171	' - Just to fill this sector with something',0
[37]	2172	AirBootRocks db 'AiR-BOOT Rocks!',0
[7]	2173
[45]	2174	db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
[36]	2175
[45]	2176	; End of Image signature.
	2177	;
	2178	ORIGIN % (image_size - 2)
	2179	dw 0BABEh
[30]	2180
	2181
[45]	2182	;
	2183	; End of Image.
	2184	;
	2185	ORIGIN % (image_size)
[97]	2186	image_end:
[30]	2187
	2188	;
[51]	2189	; Terminate LDRIMAGE segment.
[30]	2190	;
[51]	2191	IFDEF SEGMENTED
[43]	2192	LDRIMAGE ENDS
[51]	2193	ENDIF
[30]	2194
[37]	2195
[51]	2196
	2197
	2198
	2199
	2200
	2201	;##############################################################################
	2202	; BSS SEGMENT
	2203	;##############################################################################
	2204
[52]	2205	; BOOKMARK: BSS Segment
[51]	2206
[30]	2207	;
[51]	2208	; Open BSS segment.
[30]	2209	;
[51]	2210	IFDEF SEGMENTED
[37]	2211	VOLATILE SEGMENT USE16 PUBLIC 'BSS'
	2212	ENDIF
	2213
[46]	2214
	2215
[30]	2216	sobss:
[112]	2217	sobss_abs = offset sobss + image_size
[31]	2218	;------------------------------------------------------------------------------
[46]	2219
	2220
[112]	2221	;
	2222	; This is the actual start of the BSS.
	2223	; In the past however, we have had a code-loop that went out of bounds,
	2224	; overwriting the start of the BSS.
	2225	;
	2226	; Because important runtime data is stored in the BSS, we offset it
	2227	; by 400h bytes. Since the loader-image is always 62 sectors, which
	2228	; makes it 7c00h in size, the runtime data starts at 8000h.
	2229	; This is the 'BeginOfVariables' location.
	2230	;
[37]	2231
[112]	2232
[46]	2233	;
	2234	; If segmented, offsets are relative to the BSS segment.
	2235	; They are resolved at link-time.
	2236	; If not segmented, offsets are relative to the CODE segment.
	2237	;
	2238	IFDEF SEGMENTED
[112]	2239	ORG 00400h ; 7c00h + 400h = 8000h
[46]	2240	ELSE
[112]	2241	ORG 08000h ; 8000h
[46]	2242	ENDIF
	2243
	2244
[51]	2245	; -----------------------------------------------------------------------------
	2246	; START OF BSS DATA
	2247	; -----------------------------------------------------------------------------
[7]	2248	; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
	2249	BeginOfVariables:
[112]	2250	BeginOfVariablesAbs = offset BeginOfVariables + image_size
[51]	2251
	2252
	2253	; -----------------------------------------------------------------------------
	2254	; SECTOR BUFFERS
	2255	; -----------------------------------------------------------------------------
[52]	2256	; BOOKMARK: Sector Buffers
[46]	2257	PartitionSector db 512 dup (?) ; Temporary Sector for Partition
[51]	2258	PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
[46]	2259	LVMSector db 512 dup (?) ; Temporary Sector for LVM
	2260	TmpSector db 512 dup (?) ; Temporary Sector
[82]	2261	Scratch db 512 dup (?) ; Scratch buffer
[112]	2262	ALIGN 16
[30]	2263
[112]	2264
[51]	2265	; -----------------------------------------------------------------------------
	2266	; NEW PARTITION TABLE
	2267	; -----------------------------------------------------------------------------
[7]	2268	; Everything used to build a new IPT and reference it to the old one
[52]	2269	; BOOKMARK: New Partition Table
[46]	2270	NewPartTable db 1536 dup (?) ; New Partition Table
[112]	2271	ALIGN 16
[43]	2272
[51]	2273
	2274	; -----------------------------------------------------------------------------
	2275	; NEW HIDE PARTITION TABLE
	2276	; -----------------------------------------------------------------------------
[52]	2277	; BOOKMARK: New Hide-Partition Table
[51]	2278	NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
[112]	2279	ALIGN 16
[7]	2280
[51]	2281
	2282	; -----------------------------------------------------------------------------
	2283	; NEW DRIVE LETTERS
	2284	; -----------------------------------------------------------------------------
[52]	2285	; BOOKMARK: Logical Drive-Letters
[51]	2286	NewDriveLetters db LocIPT_MaxPartitions dup (?)
[112]	2287	ALIGN 16
[7]	2288
[51]	2289
	2290	; -----------------------------------------------------------------------------
	2291	; PARTITION SIZE TABLE
	2292	; -----------------------------------------------------------------------------
[46]	2293	; Size-Table (6 bytes per partition)
[52]	2294	; BOOKMARK: Partition Size Table
[51]	2295	PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
[112]	2296	ALIGN 16
[46]	2297
[51]	2298
	2299	; -----------------------------------------------------------------------------
	2300	; PARTITION POINTERS
	2301	; -----------------------------------------------------------------------------
[49]	2302	; Maximum is 52 word entries till now
[52]	2303	; BOOKMARK: Partition Pointers
[46]	2304	PartitionPointers dw 52 dup (?)
[112]	2305	ALIGN 16
[46]	2306
	2307	; Count of total Partition Pointers
	2308	PartitionPointerCount db ?
[112]	2309	ALIGN 16
[46]	2310
[112]	2311
[51]	2312	; -----------------------------------------------------------------------------
	2313	; XREF TABLE
	2314	; -----------------------------------------------------------------------------
[46]	2315	; X-Reference Table (holds new partnr, index is old part nr)
[52]	2316	; BOOKMARK: Xref Table
[51]	2317	PartitionXref db LocIPT_MaxPartitions dup (?)
[112]	2318	ALIGN 16
[46]	2319
[112]	2320
[51]	2321	; -----------------------------------------------------------------------------
	2322	; VOLUME LETTERS
	2323	; -----------------------------------------------------------------------------
[46]	2324	; Volume-Letters
	2325	; 0 - no LVM support
	2326	; 1 - LVM support, but no letter
	2327	; 'C'-'Z' - assigned drive letter
[52]	2328	; BOOKMARK: Volume Drive Letters
[51]	2329	PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
[112]	2330	ALIGN 16
[46]	2331
	2332
[51]	2333	; -----------------------------------------------------------------------------
	2334	; MISC VARS AND FLAGS
	2335	; -----------------------------------------------------------------------------
[52]	2336	; BOOKMARK: Misc Vars and Flags
[46]	2337	TotalHarddiscs db ? ; Total harddrives (by POST)
	2338	LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
	2339	NewPartitions db ? ; Freshly found partitions
[37]	2340	; Independent of SaveConfiguration
[46]	2341	TooManyPartitions db ? ; Non-zero if too many partitions found
[7]	2342
[46]	2343	VideoIO_Segment dw ? ; Segment for Video I/O
[7]	2344
[46]	2345	ExtendedAbsPos dd ? ; Extended Partition Absolute Position
	2346	ExtendedAbsPosSet db ? ; If Absolute Position set
[7]	2347
[46]	2348	CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
	2349	CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
	2350	; (filled out by PreCrap)
	2351	CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
[37]	2352	; (for detailed error message)
[112]	2353	ALIGN 16
[7]	2354
	2355
[51]	2356	; -----------------------------------------------------------------------------
	2357	; MENU RELATED VARS
	2358	; -----------------------------------------------------------------------------
[46]	2359	Menu_EntrySelected db ? ; Which partition we boot this time...
	2360	Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
	2361	Menu_AbsoluteX db ? ; Pos where Menu stuff starts
	2362	Menu_TotalParts db ? ; Copy of CFG_BootParts
	2363	Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
	2364	Menu_EntryDefault db ? ; Default Entry in filtered View
	2365	Menu_EntryLast db ? ; LastBooted Entry in filtered View
	2366	Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
[7]	2367	; - All adjusted to menu locations
[112]	2368	ALIGN 16
[7]	2369
[112]	2370
[51]	2371	; -----------------------------------------------------------------------------
	2372	; PARTITION RELATED VARS
	2373	; -----------------------------------------------------------------------------
[46]	2374	PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
	2375	PartSetup_ActivePart db ? ; Active Partition
	2376	PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
	2377	PartSetup_HiddenX db ? ; Pos for Hidden-Setup
	2378	PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
[112]	2379	ALIGN 16
[7]	2380
[112]	2381
[51]	2382	; -----------------------------------------------------------------------------
	2383	; TIMER / SETUP RELATED VARS
	2384	; -----------------------------------------------------------------------------
[46]	2385	TimedBootEnable db ? ; Local Enable/Disable for timed boot
	2386	TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
	2387	TimedSecondLeft db ? ; How many seconds are left till boom ?
	2388	TimedSecondBack db ? ; To get a modification noticed
	2389	TimedBootUsed db ? ; Timed Boot used for bootup ?
	2390	FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
	2391	SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
	2392	SETUP_ExitEvent db ? ; Exit Event to end SETUP
	2393	TempPasswordEntry db 17 dup (?)
	2394	SETUP_OldPwd db 17 dup (?)
	2395	SETUP_NewPwd db 17 dup (?)
	2396	SETUP_VerifyPwd db 17 dup (?)
	2397	StartSoundPlayed db ?
	2398	ChangePartNameSave db ? ; Save label after user-edit ?
	2399	SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
[112]	2400	ALIGN 16
[7]	2401
[51]	2402
	2403	; -----------------------------------------------------------------------------
	2404	; FX RELATED VARS
	2405	; -----------------------------------------------------------------------------
[37]	2406	FX_UseCount dw ?
	2407	FX_OverallTimer dw ?
	2408	FX_WideScrollerTimer dw ?
	2409	FX_WideScrollerCurPos dw ?
	2410	FX_WideScrollerSpeed db ?
	2411	FX_WideScrollerSpeedState db ?
	2412	FX_WideScrollerDirection db ?
	2413	FX_WideScrollerAbsDirection db ?
	2414	FX_WideScrollerBounceSpeed db ?
	2415	FX_CooperBarsTimer dw ?
[112]	2416	ALIGN 16
[7]	2417
[51]	2418	; Dynamically Generated Tables - do not need to get initialized with NUL
	2419	FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
	2420	FX_CooperState db 7 dup (?)
	2421	FX_SinusPos db 7 dup (?)
	2422	FX_CooperPos dw 7 dup (?)
[112]	2423	ALIGN 16
[51]	2424
	2425
	2426	; -----------------------------------------------------------------------------
	2427	; CHARSET BUFFER
	2428	; -----------------------------------------------------------------------------
	2429	CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
[112]	2430	ALIGN 16
[51]	2431
[112]	2432
[51]	2433	; -----------------------------------------------------------------------------
	2434	; LVM CRC TABLE
	2435	; -----------------------------------------------------------------------------
	2436	LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
[112]	2437	ALIGN 16
[51]	2438
[7]	2439
[51]	2440	; -----------------------------------------------------------------------------
[138]	2441	; LVM DRIVE-LETTER MAP
[51]	2442	; -----------------------------------------------------------------------------
[138]	2443	; Get's initialized at startup to: 00000011111111111111111111111100b
	2444	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	2445	; Each partition with an assigned drive-letter clears a bit in this map.
	2446	FreeDriveletterMap dd ?
[112]	2447	ALIGN 16
[30]	2448
[51]	2449
	2450	; -----------------------------------------------------------------------------
[138]	2451	; OS/2 PHASE1 RELATED
[51]	2452	; -----------------------------------------------------------------------------
[138]	2453	Phase1Active db ?
	2454	OldPartitionCount db ?
[112]	2455	ALIGN 16
[30]	2456
	2457
[138]	2458	; -----------------------------------------------------------------------------
	2459	; ARRAY OF DISK INFORMATION STRUCTURES
	2460	; -----------------------------------------------------------------------------
[128]	2461	; Array of DISKINFO structures
	2462	DiskInformation db MaxDisks dup(DISKINFO_Size dup(?))
	2463	ALIGN 16
[51]	2464
[138]	2465
[51]	2466	; -----------------------------------------------------------------------------
[105]	2467	; INT13X DAP
[51]	2468	; -----------------------------------------------------------------------------
[105]	2469	; Disk Address Package that holds information for LBA-access using INT13X
	2470	INT13X_DAP db ? ; Size of paket, inserted by code
	2471	db ? ; Reserved
	2472	INT13X_DAP_NumBlocks dw ? ; Number of blocks
	2473	INT13X_DAP_Transfer dd ? ; Transfer Adress
	2474	INT13X_DAP_Absolute dd ? ; Absolute Sector
	2475	dd ? ; Second Part of QWORD
	2476	INT13X_DAP_Size = $-offset [INT13X_DAP] ; Calculated size
[112]	2477	ALIGN 16
[105]	2478
[30]	2479
[138]	2480	; -----------------------------------------------------------------------------
	2481	; DEBUG
	2482	; -----------------------------------------------------------------------------
	2483	; Some debug area.
	2484	dbg_scratch db 512 dup(?)
	2485	ALIGN 16
[30]	2486
[46]	2487
[51]	2488	; End of transient variables.
	2489	EndOfVariables:
[112]	2490	EndOfVariablesAbs = offset EndOfVariables + image_size
[51]	2491
	2492
	2493
	2494	; -----------------------------------------------------------------------------
	2495	; OLD AND NEW STACKS
	2496	; -----------------------------------------------------------------------------
[52]	2497	; BOOKMARK: Storage for Old and New Stack Pointers
[51]	2498	;
	2499	; These need to be outside the variable section because AiR-BOOT can restart
	2500	; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
	2501	; they would be cleared on AiR-BOOT restart.
	2502	;
	2503
	2504	; The variable section is cleared word-wise, so it could clear one byte extra
	2505	; depending on the alignment and size. This DD prevents the OldSP and OldSS
	2506	; to be partly overwritten by the clearing routine.
	2507	dd ?
[112]	2508	ALIGN 16
[51]	2509
	2510	; SS:SP from before our relocation.
	2511	; The registers values when the BIOS transferred control to us were pushed
	2512	; on this stack.
	2513
	2514	OldSP dw ?
	2515	OldSS dw ?
	2516
	2517	; SS:SP currently in use.
	2518	; They are temporarily dumped here so we can pop the resgisters from
	2519	; the old stack to display them in debug mode.
	2520	CurrentSP dw ?
	2521	CurrentSS dw ?
[112]	2522	ALIGN 16
[132]	2523
	2524	; Usually, commits are buildable and some minor checking has been done that
	2525	; whole disks do not get wiped. However, there are situations where stuff is
	2526	; in such a flux that it would be better to do non-buildable commits.
	2527	; That makes it possible to record the changes piecemeal without the danger of
	2528	; accidently using the resulting loader. Of course everyone is clever enough
	2529	; to _never_ build commits marked as 'testing' and install the result in
	2530	; environments where wiping all attached disks and sticks would be a problem...
[133]	2531	force_build_error dd 0f000h dup(?)
[132]	2532
[51]	2533	;
	2534	; End of BSS segment.
	2535	;
[30]	2536	eobss:
[112]	2537	eobss_abs = offset eobss + image_size
[51]	2538	;
[97]	2539	; Total RAM occupied, including BSS.
	2540	; BASE is 8000:0000, LIMIT is 8000:FFFF.
	2541	; Note that the LDRIMAGE is of constant size, 7C00h = 62 sectors of 512 bytes.
	2542	;
[112]	2543	resident_size = offset eobss + image_size
[97]	2544
	2545	;
[51]	2546	; Close BSS segment.
	2547	;
[37]	2548	IFDEF SEGMENTED
[46]	2549	VOLATILE ENDS
[37]	2550	ELSE
[46]	2551	LDRIMAGE ENDS
[37]	2552	ENDIF
[43]	2553
[52]	2554	; BOOKMARK: End of Module
[45]	2555	END AiR_BOOT
[30]	2556

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