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airboot.asm@ 188

Last change on this file since 188 was 186, checked in by Ben Rietbroek, 8 years ago

Improved language selection [v1.1.1-testing]

The old method copied the language specific files to a central location
before starting the build. This is a bit annoying when using version
control because the copied files get marked as changed, blurring the
current state of the work directory. Also, the specific language files
from the last build are always the active ones.

The new method conditionally includes the specific language files based
upon the BLD_LANG definition, which is passed on the cli. No more file
copying for specific language builds.

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: 100.5 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	;
[186]	31	; This one should never be undefined, but if so, then default to English.
	32	;
	33	IFNDEF BLD_LANG
	34	BLD_LANG EQU en
	35	ENDIF
	36
	37	;
[46]	38	; Include AiR-BOOT Version Information.
[51]	39	; This version-info is defined using simpel EQU's so it can serve as a
	40	; single source for other formats. The AiR-BOOT signature and the
	41	; OS/2 BLDLEVEL use this basic version information.
[46]	42	;
[70]	43	include ../include/version.inc
[30]	44
[46]	45	;
	46	; Include OS/2 BLDLEVEL Information.
[51]	47	; It uses the version-information in VERSION.INC to build it's signature.
[46]	48	;
[60]	49	include bldlevel.inc
[46]	50
[51]	51	;
	52	; Include some macro's.
	53	; This file contains the ORIGIN macro that is used to detect overlaps.
	54	;
[60]	55	include ../include/asm.inc
[46]	56
[186]	57	;
	58	; The BLD_LANG is passed as an unquoted string so it can be used with
	59	; the 'include' directive. But for other language conditional actions a quoted
	60	; version is needed. This macro creates BLD_LANG_TXT holding the language
	61	; in single quotes.
	62	;
	63	enquote BLD_LANG,%BLD_LANG
[51]	64
[30]	65	; We actually don't want to use this directive because it generates extra
	66	; NOP instructions that we can do without.
[31]	67	; TASM also has a bug in that when the .ERR2 directive is used when
	68	; the .386 directive is in effect, the JUMPS directive is also active
	69	; and cannot be turned off.
[30]	70	; NOJUMPS seems to have no effect in this situation.
	71	; In this case 4 NOP instructions are generated after forward referencing jump
	72	; instructions, to allow for automatic recoding by TASM.
	73	; This seems to be a TASM bug. (v2,v3,v4, dunno v5)
[43]	74	IFDEF TASM
	75	;~ JUMPS
	76	ENDIF
[30]	77
[51]	78
[30]	79	;
	80	; If defined then each module is prefixed with it's name.
[51]	81	; This is used for debugging purposes but it also increases code space.
[30]	82	; It should be off in release code.
	83	;
[51]	84	;~ MODULE_NAMES EQU
[30]	85
	86
	87
[51]	88	; -----------------------------------------------------------------------------
	89	; DEBUG
	90	; -----------------------------------------------------------------------------
[30]	91
[31]	92	;
[51]	93	; Enable this to include Debug Modules and enable COM-port debugging.
	94	; To have room for the debug-code, the FX-code can only be enabled
	95	; when AUX_DEBUG is not defined.
[45]	96	;
[173]	97	;~ AUX_DEBUG EQU
[45]	98
[185]	99
[51]	100	;
[185]	101	; The FX (video animation) module is about to be completely removed from the
	102	; build to regain code space. This is especially true for non-EN builds,
	103	; which often have longer strings or even load special character sets.
[51]	104	;
[185]	105	; However, because the EN-build for REALEASE-v1.1.2 was already distributed
	106	; with ArcaOS v5, FX will only be excluded for non-EN builds. When FX is not
	107	; compiled-in and Cooper Bars is enabled in the SETUP, the TAB-key used for
	108	; switching between MENU and PRE-BOOT screens will not work.
	109	;
	110	; Upcoming releases will completely remove FX related code and SETUP options.
	111	;
	112	; As can be read in 'special/fx.asm' around line 26, this removal may have
	113	; severe consequences for me, so if no new AiR-BOOT releases appear, then you
	114	; know I have been './'-ted, which most probably will be something completely
	115	; different from being 'slash-dotted' ... ;)
	116	;
[186]	117	IF BLD_LANG_TXT EQ 'en'
[51]	118	IFNDEF AUX_DEBUG
	119	FX_ENABLED EQU
	120	ENDIF
[185]	121	ELSE
	122	echo
	123	echo *** NOTE: Excluding FX-module for this language ! ***
	124	echo
	125	ENDIF
[45]	126
	127
[51]	128	; -----------------------------------------------------------------------------
	129	; AUX
	130	; -----------------------------------------------------------------------------
[45]	131	;
[31]	132	; bits 7-5 = datarate
	133	; (000=110,001=150,010=300,011=600,100=1200,101=2400,110=4800,111=9600 bps)
	134	; bits 4-3 = parity
	135	; (00 or 10 = none, 01 = odd, 11 = even)
	136	; bit 2 = stop-bits
	137	; (set = 2 stop-bits, clear = 1 stop-bit)
	138	; bits 1-0 = data-bits
	139	; (00 = 5, 01 = 6, 10 = 7, 11 = 8)
	140	;
[30]	141
[31]	142	; 9600 bps, no parity, 1 stop-bit, 8 bits per char
[43]	143	AUX_INIT_PARMS EQU 11100011b
[31]	144
[43]	145	; Com-port for debugging, 0 is disabled
	146	BIOS_COM_PORT EQU 1
	147
[31]	148	; Default word value for BIOS_AuxParms variable
	149	; Note that is has moved since v1.07
[43]	150	BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
[31]	151
[78]	152	; Default byte value for BIOS_BootDisk variable
[77]	153	BIOS_BOOTDISK_DEFAULT EQU 80h
[43]	154
	155
	156
[51]	157	; -----------------------------------------------------------------------------
	158	; LABELS
	159	; -----------------------------------------------------------------------------
	160	; Address labels after code-move
[76]	161	BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
	162	BootBasePtr equ 0h ; We put our MBR to this location
[51]	163	BootBaseExec equ BootBasePtr+offset MBR_RealStart
[76]	164	StackSeg equ 07000h ; Put the stack below the code
	165	StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
	166	StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
[7]	167
	168
[30]	169
[51]	170	; -----------------------------------------------------------------------------
	171	; VIDEO
	172	; -----------------------------------------------------------------------------
[30]	173	; Video pages, no INT 10h is used for menu-drawing etc.
[7]	174	VideoIO_Page0 equ 0B800h
	175	VideoIO_Page1 equ 0B900h
	176	VideoIO_Page2 equ 0BA00h
	177	VideoIO_Page4 equ 0BC00h
	178	VideoIO_FXSegment equ 0A000h
	179
[30]	180	; Special line-drawing characters
[69]	181	TextChar_WinLineRight equ 0C4h
	182	TextChar_WinLineDown equ 0B3h
	183	TextChar_WinRep1 equ 0D1h
	184	TextChar_WinRep2 equ 0C5h
	185	TextChar_WinRep3 equ 0CFh
	186	TextChar_WinRep4 equ 0B5h
	187	TextChar_WinRep5 equ 0C6h
	188	TextChar_WinRep6 equ 0D8h
[7]	189
[51]	190
[128]	191	; -----------------------------------------------------------------------------
	192	; DISK INFORMATION
	193	; -----------------------------------------------------------------------------
	194	; Offsets into the DISKINFO structures located in the array [DiskInformation]
[51]	195
[128]	196	; BIOS disk number and MBR flags
	197	LocDISKINFO_DiskNum equ 00h ; BYTE - BIOS disk number (80h etc)
	198	LocDISKINFO_MbrFlags equ 01h ; BYTE - Valid MBR, etc
	199
	200	; BIOS INT13 Info
	201	LocDISKINFO_I13_Secs equ 02h ; WORD - Max 63
	202	LocDISKINFO_I13_Heads equ 04h ; WORD - Max 16 or 255
	203	LocDISKINFO_I13_Cyls equ 06h ; WORD - Max 1024
	204
	205	; BIOS INT13X Info
	206	LocDISKINFO_I13X_Flags equ 08h ; WORD - CHS valid, etc
	207	LocDISKINFO_I13X_SecSize equ 0ah ; WORD - Normally 512 bytes
	208	LocDISKINFO_I13X_Secs equ 0ch ; DWORD - Max 63 ?
	209	LocDISKINFO_I13X_Heads equ 10h ; DWORD - Max 255 ?
	210	LocDISKINFO_I13X_Cyls equ 14h ; DWORD - Max 2_32 (4294967296)
	211	LocDISKINFO_I13X_SecsLBA equ 18h ; QWORD - Max 2^64 (4294967296^2)
	212	LocDISKINFO_I13X_HostBus equ 20h ; 4 bytes
	213	LocDISKINFO_I13X_Interface equ 24h ; 8 bytes
	214
	215	; OS/2 LVM Info
	216	LocDISKINFO_LVM_Flags equ 2ch ; WORD - OS/2 ext geo, etc
	217	LocDISKINFO_LVM_MasterLBA equ 2eh ; DWORD - Max 254
	218	LocDISKINFO_LVM_Secs equ 32h ; DWORD - Max 255
	219	LocDISKINFO_LVM_Heads equ 36h ; DWORD - Max 255
	220	LocDISKINFO_LVM_Cyls equ 3ah ; DWORD - Max 65536
	221
	222	; Custom Info
	223	LocDISKINFO_Flags equ 3eh ; WORD - Custom flags, dunno yet
	224
	225	; Size of this structure
	226	DISKINFO_Size equ 40h ; Size to be allocated
	227
	228
[51]	229	; -----------------------------------------------------------------------------
	230	; PARTITION TABLE
	231	; -----------------------------------------------------------------------------
	232	; Offsets for Partition-Entries in MBR/EBRs
[37]	233	LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
	234	LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
[51]	235	LocBRPT_BeginCHS equ 1 ; Packed CHS value
	236	LocBRPT_BeginHead equ 1 ; Start head, usually < 16
	237	LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
	238	LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
[37]	239	LocBRPT_SystemID equ 4 ; Type of system using the partition
[51]	240	LocBRPT_EndCHS equ 5 ; Packed CHS value
	241	LocBRPT_EndHead equ 5 ; End head, usually < 16
	242	LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
	243	LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
	244	LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
	245	LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
[7]	246
[51]	247	; Signature relative to start of MBR/EBR
	248	LocBR_Magic equ 510 ; Offset of 0AA55h signature
[7]	249
[128]	250
[51]	251	; -----------------------------------------------------------------------------
	252	; LVM RECORD
	253	; -----------------------------------------------------------------------------
[34]	254	; Used as a quick compare in LVM.ASM
[37]	255	LocLVM_SignatureByte0 equ 02h
[30]	256
[34]	257	; Offsets for LVM Information Sector.
	258	; These are relative to the start of the LVM sector.
[37]	259	LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
	260	LocLVM_CRC equ 08h ; CRC is a DWORD
	261	LocLVM_Heads equ 1ch ; Number of heads
	262	LocLVM_Secs equ 20h ; Sectors per Track
	263	LocLVM_DiskName equ 24h ; Name of the disk
	264	LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
	265	LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
[30]	266
[34]	267	; An LVM info-sector can contain information on max. 4 partitions.
	268	; All 4 entries will be used when there 4 primary partitions defined.
	269	; For logical partitions, the LVM info-sector is located below the start
	270	; of the logical partition and only one LVM entry is used in that logical
	271	; LVM info-sector.
[37]	272	LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
[30]	273
[51]	274
	275	; -----------------------------------------------------------------------------
	276	; LVM ENTRY
	277	; -----------------------------------------------------------------------------
[34]	278	; Offsets for LVM entry.
	279	; These are relative to the start of the entry.
[51]	280	LocLVM_VolumeID equ 00h ; DWORD
	281	LocLVM_PartitionID equ 04h ; DWORD
	282	LocLVM_PartitionSize equ 08h ; DWORD
	283	LocLVM_PartitionStart equ 0ch ; DWORD
[37]	284	LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
	285	LocLVM_Startable equ 11h ; is Startable (newly installed system)
[51]	286	LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
	287	LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
	288	LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
[37]	289
[71]	290	; Truncated to 11 chars when displayed in menu.
[34]	291	; MiniLVM sets both to the same value.
	292	; Also, MiniLVM uses a 0-byte terminator, so the maximum length is 19d.
	293	; Same goes for LocLVM_DiskName.
[45]	294	; These offsets are relative to an LVM entry.
[37]	295	LocLVM_VolumeName equ 14h ; 20 bytes
	296	LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
[30]	297
[45]	298	; LVM constants.
[51]	299	LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
	300	LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
	301	LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
	302	LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
[30]	303
[34]	304
[51]	305	; -----------------------------------------------------------------------------
	306	; AiR-BOOT IPT
	307	; -----------------------------------------------------------------------------
[7]	308	; Offsets for IPT (Internal Partition Table)
[51]	309	LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
[37]	310	LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
	311	LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
	312	LocIPT_Serial equ 0 ; Serial from MBR ?
	313	LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
	314	LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
	315	LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
[51]	316	LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
[37]	317	LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
	318	LocIPT_LocationBegin equ 20 ; Begin of Partition
	319	LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
	320	LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
	321	LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
[7]	322
[38]	323
[30]	324	; AiR-BOOT IPT-Flags
[37]	325	LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
[51]	326	LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
[7]	327
[37]	328	Flags_Bootable equ 00000001b
	329	Flags_VIBR_Detection equ 00000010b
	330	Flags_HideFeature equ 00000100b
	331	Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
[46]	332	Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
[37]	333	Flags_NoPartName equ 01000000b
	334	Flags_NowFound equ 10000000b ; temp only in OldPartTable
	335	Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
[7]	336
[37]	337	FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
	338	FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
	339	FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
	340	FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
[7]	341
[51]	342
	343	; -----------------------------------------------------------------------------
	344	; AiR-BOOT HPT
	345	; -----------------------------------------------------------------------------
	346	; Hidden Partition Table
	347	; Length of an HPT-entry ((45 * 6 bits-per-part) / 8) * 45
	348	; 33.75 = 34 bytes for HPT-entry, coincidently same as length of IPT-entry.
	349	; Packed table !
	350	LocHPT_LenOfHPT equ 34
	351
	352
	353	; -----------------------------------------------------------------------------
	354	; NAVIGATION KEYS
	355	; -----------------------------------------------------------------------------
[30]	356	; Navigation keys
[37]	357	Keys_Up equ 48h
	358	Keys_Down equ 50h
	359	Keys_Left equ 4Bh
	360	Keys_Right equ 4Dh
	361	Keys_PageUp equ 49h
	362	Keys_PageDown equ 51h
	363	Keys_GrayPlus equ 4Eh
	364	Keys_GrayMinus equ 4Ah
	365	Keys_Plus equ 1Bh
	366	Keys_Minus equ 35h
	367	Keys_ENTER equ 1Ch
	368	Keys_ESC equ 1h
	369	Keys_F1 equ 3Bh
	370	Keys_F10 equ 44h
[51]	371	Keys_C equ 2Eh ; Add. Check for Ctrl!
[37]	372	Keys_Y equ 2Ch
	373	Keys_Z equ 15h
	374	Keys_N equ 31h
	375	Keys_TAB equ 0Fh
	376	Keys_Delete equ 53h
	377	Keys_Backspace equ 0Eh
	378	Keys_Space equ 20h
[7]	379
[37]	380	Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
[7]	381
	382
[51]	383	; -----------------------------------------------------------------------------
	384	; MISC
	385	; -----------------------------------------------------------------------------
	386	; Initial value for the FreeDriveletterMap
	387	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	388	; Each partition with an assigned drive-letter clears a bit in this map.
	389	; (Not implemented yet)
	390	InitialFreeDriveletterMap equ 00000011111111111111111111111100b
[46]	391
[51]	392	;
	393	; The first harddisk is BIOS coded 80h.
	394	; This makes a total of 128 disks that could be supported using this coding.
	395	; This value is used to store disk-information and this info is allocated
	396	; in the BSS. 64 disks ought to be enough for everybody :-)
	397	;
	398	MaxDisks equ 64
[46]	399
	400
	401
[51]	402
	403
	404
	405	;##############################################################################
[46]	406	; AiR-BOOT / MAIN-CODE
[51]	407	;##############################################################################
[46]	408
[51]	409	;
[43]	410	; Because of the TASM-bug the processor had to be changed to turn JUMPS
	411	; off. Existing movzx instructions were replaced with 286 equivalent code.
	412	; Out of range relative jumps have been recoded.
[51]	413	;
	414	; Since version 1.0.8, JWasm is the preferred assembler and Tasm will be
	415	; dropped. Also, the chances of AiR-BOOT being used on a 286-machine are
	416	; very slim, so a future version will revert back to .386 and also incorporate
	417	; 32-bit code. This will enable some enhanced constructs such as scaled
	418	; indexing, bit-instructions, 32-bit registers and what not.
	419	;
[43]	420	.286
[30]	421
[51]	422	;
	423	; For Tasm, MODEL is needed for the USES directive to work.
	424	; So always use a model when assembling with Tasm otherwise registers on
	425	; function calls that use USES are not saved and restored.
	426	; The model itself, has no real effect because we generate a binary image
	427	; and not a segmented executable.
	428	; For the other assemblers we define no model to get rid of the default C/C++
	429	; segments for future object-linked versions of AiR-BOOT.
	430	;
[43]	431	IFDEF TASM
[46]	432	;~ .model large, basic
[43]	433	.model tiny,c
	434	ENDIF
[37]	435
	436	;
[51]	437	; The below is used to switch between the original 1-segment (code_seg) layout
	438	; and the new 2-segment (code_seg and bss_data) layout.
	439	; It will be removed in future versions.
[37]	440	; The 2-segment layout was needed for JWasm because it does not treat
[51]	441	; db ? at the end of a code segment as bss-data.
[37]	442	; Therefore, a true BSS segment is now used.
[51]	443	; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
[37]	444	; segment.
	445	; Note that this influences the offsets in the BSS in the list-file and
	446	; the wdis disassembly file (.WDA).
	447	; They are now segment-relative. The true offset is resolved at link
	448	; time.
	449	;
[43]	450	SEGMENTED EQU
[37]	451
[51]	452	IFDEF SEGMENTED
	453	AIRBOOT GROUP LDRIMAGE,VOLATILE
	454	ENDIF
[37]	455
[51]	456	; Our code-segment starts here.
	457	LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
[7]	458
[51]	459	IFDEF SEGMENTED
	460	ASSUME CS:AIRBOOT, DS:AIRBOOT, ES:nothing, SS:nothing
	461	ELSE
	462	ASSUME CS:LDRIMAGE,DS:LDRIMAGE,ES:nothing, SS:nothing
	463	ENDIF
[30]	464
[51]	465
	466
[31]	467	;==============================================================================
[51]	468	; Sector 1
	469	;==============================================================================
[30]	470
[51]	471	;------------------------------------------------------------------------------
[46]	472	; We are not a .COM file at 100h but a BINARY image
	473	; of which only the 1st sector gets loaded at 0000:07c00h
	474	; by the BIOS. The code in this 1st sector is position
	475	; independent and moves itself to a new location at 8000:0000h.
	476	; Then it jumps to a new entry-point and loads the rest of
	477	; the image to the new location.
[51]	478	org 00000h
	479	;------------------------------------------------------------------------------
[30]	480
[46]	481
	482	;
[51]	483	; Since AiR-BOOT is a boot-loader residing in track0, the first 512 bytes
	484	; have the layout of a Master Boot Record (MBR). When AiR-BOOT get's installed,
	485	; the first 512 bytes of this code get's merged with the Partition Table.
	486	; The rest is installed in the remaining sectors with sector 62 (LBA 61)
	487	; being the last sector used by AiR-BOOT. Sector 63 is reserved for IBM LVM.
	488	; The last sector used by AiR-BOOT is a copy of the MBR that AiR-BOOT makes
	489	; every time a system gets booted.
[46]	490	;
[30]	491
[46]	492	;
[51]	493	; Due to the addition of an extra 'I13X' sugnature and code to preserve the
	494	; values of the registers on entry, the MBR-code has become a bit messy.
	495	; This will be cleaned-up in future versions.
	496	;
	497
	498	;
[46]	499	; Martin had a short jump followed by the AiRBOOT signature at first.
	500	; Then he encountered strange behaviour by some M$ operating-systems
	501	; if the the first insruction was not a CLI.
[30]	502	; But there was no room to insert the CLI and of course he did not want to
[51]	503	; change the location of the AiR-BOOT signature.
[30]	504	; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
[51]	505	; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
[46]	506	;
[30]	507
	508
[51]	509	; -----------------------------------------------------------------------------
	510	; FIRST ENTRY-POINT
	511	; -----------------------------------------------------------------------------
[52]	512	; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
[51]	513	; ######################################################
	514	; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
	515	; ######################################################
[37]	516	AiR_BOOT:
[51]	517	; Some M$ operating systems need a CLI
	518	; here otherwise they will go beserk
	519	; and will do funny things during
	520	; boot phase, it's laughable!
	521	MBR_1stOpc: cli
[30]	522
[51]	523	; JMP-Short -> MBR_Start
	524	; Uses the 'A' from the signature as the displacement !
	525	MBR_JmpOpc db 0EBh
[7]	526
[51]	527	; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
	528	;~ db 'AiRBOOT',24h,02h,20h,12h,01h,08h,TXT_LanguageID
	529	MBR_ABSig: InsertAirbootSignature TXT_LanguageID
[37]	530
[51]	531	; Total Code Sectors Count.
	532	; Actual value will be inserted by FIXCODE.
	533	MBR_CodeSecs db 1
[37]	534
[51]	535	; Total Code Sectors Count, dynamically calculated.
	536	;~ db (code_end-$)/512
[37]	537
[51]	538	; Check-Sum for Code
	539	MBR_CheckCode dw 0
[37]	540
	541
	542
[51]	543	; -----------------------------------------------------------------------------
	544	; THIRD ENTRY-POINT
	545	; -----------------------------------------------------------------------------
[52]	546	; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
[30]	547	;
	548	; No single instruction below should be changed, added or removed in the code
	549	; below as this will cause the jump-link to go haywire.
[31]	550	;
[37]	551	MBR_Start:
[51]	552	;
	553	; When we arrive here, no registers have been used yet.
	554	; So, they still contain the values the BIOS left in them.
	555	; We want to preserve those value's for later inspection
	556	; by putting them on the stack.
	557	;
[30]	558
[51]	559	; No space for this instruction here.
	560	; We'll enable interrupts later.
	561	;sti ; This opcode is dedicated to:
	562	; =MICROSOFT JUMP DEPARTMENT=
	563
	564	; Push all registers with values provided by the BIOS
	565	; on the stack.
	566	pusha
	567
	568	;
[37]	569	; Setup some base stuff
	570	; AX got loaded wrongly for debug, changed the instructions
	571	; without modifying the number of bytes.
[51]	572	; Don't comment-out the redundant instruction below because it
[37]	573	; will change the number of bytes and break the jump-chain.
[51]	574	;
	575
	576	; The segment we are moving ourself from (NOT USED)
	577	;mov ax, StartBaseSeg
[37]	578	;mov ds, ax
[51]	579
	580	; Make sure DS points to CS.
[37]	581	push cs
	582	pop ds
[51]	583
	584	; Setup the source and destination for the code move.
	585	mov si, StartBasePtr ; The offset we move ourself from
	586	mov ax, BootBaseSeg ; The target segment we move to
[37]	587	mov es, ax
[51]	588	;mov di, BootBasePtr ; The target offset we move to
	589	; Changed the instruction to make room.
	590	; So, BootBasePtr is not used !
	591	; The offset in the target segment is assumed to be 0000
	592	; anyway.
	593	xor di,di
	594	;sti
[30]	595
[76]	596	; Size of the MBR in words.
[37]	597	mov cx, 256 ; Pre-boot environment
[30]	598
[37]	599	;
[51]	600	; This moves this 512-byte sector, loaded by the BIOS at
	601	; 0000:7c00 to 8000:0000.
[37]	602	;
[51]	603	cld
[37]	604	rep movsw
[30]	605
[77]	606	; Temporary save SS and SP so we still have access to this
	607	; stack after we have setup our own.
	608	mov cx,ss
	609	mov bx,sp
	610
[51]	611	; Code an intersegment jump to the new location.
	612	; jmp BootBaseSeg:BootBaseExec
	613	; Note that DX:BX containts the old SS:SP.
[37]	614	db 0EAh
[46]	615	dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
	616	dw BootBaseSeg ; This is 08000h
[7]	617
[30]	618
[51]	619
	620
	621	; -----------------------------------------------------------------------------
	622	; SIMPLE MBR FUNCTIONS
	623	; -----------------------------------------------------------------------------
[30]	624	;
	625	; Some MBR-functions to provide absolute minimum functionality.
	626	;
	627
	628	;
[52]	629	; BOOKMARK: Halt System
[30]	630	; Entry-point for halting the system.
	631	;
[7]	632	MBR_HaltSystem:
[37]	633	mov ax, 8600h
	634	xor cx, cx
	635	mov dx, 500
[46]	636	int 15h ; Wait to display the whole screen :]
	637	MBR_HaltSys:
[81]	638	;~ cli
[37]	639	jmp MBR_HaltSys
[7]	640
[31]	641
[77]	642	; Base of some MBR variables
[45]	643	ORIGIN 0003Ch
	644
[77]	645	MBR_Variables:
	646
[51]	647	; Comport settings.
	648	; It had to be moved to create room for the double I13X signature.
[37]	649	; It cannot be in the config-area (sector 55)
[43]	650	; because that area is crc-protected and would not allow 'poking'.
	651	BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
[31]	652
[77]	653	; When the BIOS turns over control to the MBR, DL holds the BIOS disk-number
	654	; from which the boot was initiated. This would normally be 80h, corresponding
	655	; to the first physical disk. However, some modern BIOSses can directly boot
	656	; from other disks, so AirBoot cannot assume being loaded from 80h anymore.
	657	; So here we store the BIOS disk-number passed in DL when AirBoot got control.
	658	BIOS_BootDisk db BIOS_BOOTDISK_DEFAULT ; Get overwritten with 'DL'
[51]	659
[77]	660	; Reserved space for future variables.
[51]	661	IFDEF AUX_DEBUG
[77]	662	reserved db 5 dup('X')
[51]	663	ELSE
[77]	664	reserved db 5 dup(0)
[51]	665	ENDIF
[30]	666
[45]	667
[51]	668
	669
	670	; -----------------------------------------------------------------------------
	671	; SECOND ENTRY-POINT
	672	; -----------------------------------------------------------------------------
[77]	673
[37]	674	;
	675	; We arrive here after the first jump using the 'A' of the
[51]	676	; AiR-BOOT signature. So we ensure the jump is always at
	677	; this offset. We jump here, because Martin needed to
	678	; insert a CLI on start and did not want to change the
	679	; AiR-BOOT signature because of Microsoft inventions...
[45]	680	;
	681	ORIGIN 00044h
[37]	682
	683	; Jump again...
[51]	684	; This time to the code that relocates to 8000:0000.
[52]	685	; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
[37]	686	jmp MBR_Start
	687
[30]	688	;
	689	; Entry-point when loading fails.
	690	;
[37]	691	db 'LOAD ERROR!', 0
	692	MBR_LoadError Proc Near
	693	mov si, offset $-12
	694	push cs
	695	pop ds
	696	call MBR_Teletype
	697	MBRLE_Halt:
	698	jmp MBRLE_Halt
	699	MBR_LoadError EndP
[7]	700
[30]	701	;
	702	; Entry-point when saving fails.
	703	;
[37]	704	db 'SAVE ERROR!', 0
	705	MBR_SaveError Proc Near
	706	mov si, offset $-12
	707	push cs
	708	pop ds
	709	call MBR_Teletype
	710	MBRSE_Halt:
	711	jmp MBRSE_Halt
	712	MBR_SaveError EndP
[7]	713
[30]	714
	715	; Put text on the screen using the BIOS tele-type function.
	716	; No attributes like color are supported.
[7]	717	; In: SI - Pointer to begin of string (EOS is 0)
	718	; Destroyed: SI
[37]	719	MBR_Teletype Proc Near Uses ax bx cx
	720	mov ah, 0Eh
	721	mov bx, 7
	722	MBRT_Loop:
	723	lodsb
	724	or al, al
	725	jz MBRT_End
	726	int 10h
	727	jmp MBRT_Loop
	728	MBRT_End:
	729	ret
	730	MBR_Teletype EndP
[7]	731
[30]	732	;
	733	; Rousseau: DO NOT ADD CODE TO THIS SECTION !
	734	;
	735
[52]	736	; In: BX - Base Check
	737	; DS:SI - Pointer to 512-byte-area to be included
	738	; Out: BX - Base Check Result
[7]	739	; Destroyed: SI will get updated (+512)
[37]	740	MBR_GetCheckOfSector Proc Near Uses ax cx
	741	mov cx, 256
	742	MBRGCOS_Loop:
	743	lodsw
	744	xor ax, 0BABEh
	745	xor bx, ax
	746	loop MBRGCOS_Loop
	747	or bx, bx
	748	jnz MBRGCOS_NoFixUp
	749	mov bx, 1 ; dont allow 0, cause 0 == empty
	750	MBRGCOS_NoFixUp:
	751	ret
	752	MBR_GetCheckOfSector EndP
[7]	753
[30]	754
	755
	756
	757
	758
[51]	759	; -----------------------------------------------------------------------------
	760	; ENTRY-POINT OF MOVED CODE
	761	; -----------------------------------------------------------------------------
	762
[30]	763	;
[51]	764	; When we arrive here we are running at 8000:0000.
[77]	765	; CX:BX contains the SS:SP of the old stack.
[30]	766	;
	767
[51]	768	;
	769	; This is where the rest of AiR-BOOT gets loaded from track0.
	770	;
[52]	771	; BOOKMARK: Running at relocated position (Load additional sectors)
[31]	772	;------------------------------------------------------------------------------
[7]	773	MBR_RealStart:
[51]	774	;
	775	; Setup new stack and other segment registers.
	776	;
[37]	777	mov ax, StackSeg ; 07000h, below the moved code
	778	mov ss, ax
	779	mov sp, 7FFEh ; Even is better
[51]	780	push es ; ES holds segment where we moved to
[52]	781	pop ds ; Set DS=ES to Code Segment
[30]	782
[51]	783	;
[77]	784	; Push the old SS:SP which was saved in CX:BX on the new stack.
[51]	785	;
[77]	786	push cx ; Old SS
[51]	787	push bx ; Old SP
[43]	788
[77]	789	;
	790	; Store the BIOS disk-number AirBoot was loaded from.
	791	;
	792	mov [BIOS_BootDisk], dl
[51]	793
[37]	794	; Load the configuration-sectors from disk.
[51]	795	; These are the main configuration sector and the various
	796	; tables that follow it upto but not including the MBR backup.
[77]	797	mov bx, offset Configuration ; Location in RAM
	798	mov cx, 0037h ; Config sector is at 55d
	799	mov al, (MBR_BackUpMBR - Configuration) / 200h
	800	mov ah, 02h
	801	; DL is already loaded with BIOS disk-number
	802	int 13h ; Call BIOS service
[37]	803	jnc MBR_ConfigCopy_NoError
[30]	804
[37]	805	; Some error occured
	806	MBR_ConfigCopy_LoadError:
[77]	807	jmp MBR_LoadError ; Will Abort BootUp
[30]	808
[77]	809	; Load the code-sectors from disk.
	810	; [MBR_CodeSecs] is filled in by the FIXCODE helper that post
	811	; processes the AIRBOOT loader image after it has been built.
[37]	812	MBR_ConfigCopy_NoError:
[77]	813	mov bx, offset FurtherMoreLoad ; Directly after MBR
	814	mov cx, 0002h ; Start at 2nd sector
	815	mov al, [MBR_CodeSecs] ; Number of code sectors
	816	mov ah, 02h ; Read sectors
	817	; DL is already loaded with BIOS disk-number
	818	int 13h ; Call BIOS service
[37]	819	jnc MBR_RealStart_NoError
[31]	820
[77]	821	; Some error occured
	822	jmp MBR_LoadError ; Will Abort BootUp
[31]	823
[77]	824
	825	; I13X Signatures
	826	ORIGIN 000d0h
	827
[37]	828	; [v1.05+]
	829	; Signature for IBM's LVM to detect our "powerful" features ;)
[45]	830	;
[37]	831	; [v1.0.8+]
	832	; Reworked MBR code to be able to create a
	833	; double 'I13X' signature.
	834	; MBR's created with LVM eCS v1.x have the signature at 0d5h
	835	; MBR's created with LVM eCS v2.x have the signature at 0d0h
	836	; See eCS bugtracker issue #3002
[45]	837	;
[37]	838	; Update: These are actually MOV EAX,'X31I' instructions
	839	; in the eCS LVM MBR-code. They are at different places in
[51]	840	; the v1.x and v2.x LVM MBR-code. Other code might depend on
	841	; their presence. Let's protect their location.
[37]	842	db 'I13X',0,'I13X',0
[31]	843
[30]	844
[37]	845	MBR_RealStart_NoError:
	846	; Now Check Code with CheckSum
	847	mov si, offset FurtherMoreLoad
[30]	848
[37]	849	;movzx cx, bptr ds:[10h]
	850	mov cl, ds:[10h]
	851	mov ch,0
[31]	852
[51]	853	; Claculate checksum
[37]	854	xor bx, bx
	855	MBR_RealStart_CheckCodeLoop:
	856	call MBR_GetCheckOfSector
	857	loop MBR_RealStart_CheckCodeLoop
[31]	858
[184]	859	; Verify checksum -- EQUAL if OK
[37]	860	cmp MBR_CheckCode, bx
[7]	861
[184]	862	;
	863	; The CRC is calculated and inserted in the loader image when
	864	; AiR-BOOT is installed. Ignoring the CRC enables manually
	865	; merging the loader without using the installer. This is used
	866	; for debugging in virtual machines, where it is easy to
	867	; merge the loader to the disk image of the VM.
	868	;
	869	IFDEF CRC_IGNORE
	870	jmp MBR_RealStart_CheckSuccess ; Ignore CRC
	871	ELSE
	872	je MBR_RealStart_CheckSuccess ; Honor CRC -- EQ is OK
	873	ENDIF
	874
	875	;
[72]	876	; Oops, checksum mismatch -- halt the system
[184]	877	;
[37]	878	mov si, offset TXT_ERROR_Attention
	879	call MBR_Teletype
	880	mov si, offset TXT_ERROR_CheckCode
	881	call MBR_Teletype
	882	mov si, offset TXT_ERROR_CheckFailed
	883	call MBR_Teletype
	884	jmp MBR_HaltSystem
[51]	885
	886
	887	;
	888	; OK, all loading went fine so the rest of the code
	889	; is present now, so we jump to it.
	890	; The old SS:SP is still on the stack.
	891	;
[37]	892	MBR_RealStart_CheckSuccess:
	893	jmp AiR_BOOT_Start
[30]	894
	895
	896
	897
[37]	898
[31]	899	;------------------------------------------------------------------------------
[186]	900	include_from text/%BLD_LANG,mbr.asm ; All translateable Text in MBR
[31]	901	;------------------------------------------------------------------------------
[30]	902
[77]	903	; Disk Signature
	904	ORIGIN 001B8h
[30]	905
	906
[37]	907	; Disk Signature
	908	; Note that in an LVM 2.x MBR this collides
	909	; with the dummy PTE that it uses to look for IBM-BM
	910	; on the second harddisk.
[52]	911	; AiR-BOOT installer will merge the field
	912	; from the MBR it replaces.
[51]	913	MBR_DrvSig db 'DSIG'
[31]	914
[45]	915	; Unused word at 01BCh.
	916	; An LVM 2.x MBR puts 0CC33h here.
[52]	917	; AiR-BOOT installer will merge the field
	918	; from the MBR it replaces.
[51]	919	MBR_Spare dw '$$'
[35]	920
	921
[45]	922	; Partition Table.
	923	ORIGIN 001BEh
[43]	924
[45]	925	; The 4 entries just for show.
[52]	926	; AiR-BOOT installer will merge them from the MBR it replaces.
[51]	927	MBR_PartTable:
[37]	928	db 16 dup('0')
	929	db 16 dup('1')
	930	db 16 dup('2')
	931	db 16 dup('3')
	932
	933	; Boot Sigbature
[51]	934	MBR_Sig dw 0aa55h
[37]	935
[30]	936
	937
	938
[37]	939
[45]	940
[51]	941
[31]	942	;==============================================================================
[51]	943	; Sector 2
	944	;==============================================================================
[30]	945
[51]	946	; -----------------------------------------------------------------------------
	947	; FILE-SYSTEM TABLES
	948	; -----------------------------------------------------------------------------
	949
[77]	950	; First sector the rest of the loader image
[45]	951	ORIGIN 00200h
[30]	952
[31]	953	;
	954	; Everything beyond this point is loaded on startup
	955	; and is NOT existant at first
	956	;
[7]	957	FurtherMoreLoad:
[30]	958
	959	;
	960	; Filesystem table correlating id with name.
	961	;
	962
[37]	963	; first Normal-Partition-ID, Hidden-Partition-ID
[51]	964	; and Default-Partition-Flags.
[37]	965	; 01h -> Boot-Able
	966	; 10h -> FAT32 - Name Getting Scheme
	967	; 20h -> No Name To Get (use Partition Name from IPT)
	968	; 40h -> 'L' flag possible
[7]	969	db 'AiRSYS-TABLE'
[37]	970	FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
[29]	971	db 07h, 17h,41h, 08h,017h,21h, 35h,035h,20h,0FCh,017h,41h
	972	db 09h, 19h,11h, 0Bh,01Bh,11h, 0Ch,01Ch,11h,0EBh,0EBh,01h
[7]	973	db 63h, 63h,21h, 81h,081h,21h, 83h,083h,21h, 40h,040h,21h
	974	db 0A5h,0A5h,21h,0A6h,0A6h,21h, 82h,082h,20h,0A7h,0A7h,21h
	975	db 63h, 63h,21h, 4Dh,04Dh,21h, 4Eh,04Eh,21h, 4Fh,04Fh,21h
	976	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	977	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	978	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	979	db 01h, 01h,01h,0FDh,0FDh,20h, 84h,084h,20h,0A0h,0A0h,20h
	980	db 0Ah, 0Ah,20h,0FEh,0FEh,21h,0FFh,0FFh,21h, 00h,000h,21h
	981	db 16 dup (0)
	982
[46]	983	FileSysNames db 'FAT12 ', 'FAT16 ', 'FAT16Big', 'FAT16Big'
	984	db 'HPFS ', 'NTFS ', 'LVM-Data', 'JFS '
	985	db 'FAT32 ', 'FAT32 ', 'FAT32 ', 'BeOS '
	986	db 'Unix ', 'Minix ', 'Linux ', 'Venix ' ; x row ;)
	987	db 'BSD/386 ', 'OpenBSD ', 'LinuxSwp', 'NeXTSTEP'
	988	db 'GNU HURD', 'QNX ', 'QNX ', 'QNX '
	989	db ' ', ' ', ' ', ' '
	990	db ' ', ' ', ' ', ' '
	991	db ' ', ' ', ' ', ' '
	992	db ' ', 'Kernel ', ' ', '0V-Award'
	993	; db 'OS/2 Man', 'via BIOS', 'Floppy ', 'Unknown '
	994	db 'OS2-BMGR', 'via BIOS', 'Floppy ', 'Unknown '
[7]	995	; -> 44 Partition-Types
	996
[30]	997
	998
	999
[37]	1000
	1001
[51]	1002	;==============================================================================
	1003	; Sector 3
	1004	;==============================================================================
[30]	1005
[51]	1006	; -----------------------------------------------------------------------------
	1007	; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
	1008	; -----------------------------------------------------------------------------
[30]	1009
[77]	1010	; The entry-point jumped to from the MBR code
[51]	1011	ORIGIN 00400h
[30]	1012
[43]	1013
[77]	1014	;##############################################################################
	1015	;# AiR_BOOT_Start :: This is where the real work begins #
	1016	;# -------------------------------------------------------------------------- #
	1017	;# At this point, all of AirBoot is loaded, including its configuration. #
	1018	;# First, some setup is done, which includes the initialization of variables #
	1019	;# in the BSS. After that, disks are scanned for partitions and the required #
	1020	;# house keeping is done to incorporate changes from the previous boot. Then #
	1021	;# the partition list is prepared and the menu is presented. #
	1022	;##############################################################################
[52]	1023	; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
[36]	1024	AiR_BOOT_Start:
[30]	1025
[36]	1026
[51]	1027	;
	1028	; Enable interrupts.
	1029	;
	1030	sti
[36]	1031
	1032	;
[51]	1033	; Pop the old SS:SP from the stack and save it in the BSS.
[52]	1034	; Note that this is outside the normal variable area that gets cleared.
	1035	; This allows AiR-BOOT to restart itself when debugging and come-up
	1036	; with access to the original values of registers the BIOS passed.
[51]	1037	;
	1038	pop [OldSP]
	1039	pop [OldSS]
	1040
[141]	1041	; Clear the BSS from its real start just upto the end of the variables.
	1042	; Here 'real start' means from where the BSS begins, which is below
	1043	; the point where the first variables are located. The part after
	1044	; the variables is not cleared because that is where the old SS:SP is
	1045	; stored, which is needed for AirBoot restarts during debugging.
	1046	mov bx, offset sobss
	1047	mov cx, offset EndOfVariables - offset sobss
	1048	xor ax, ax
	1049	call FillMemBlock
[51]	1050
[142]	1051	; Initialize the com-port for debugging
	1052	IFDEF AUX_DEBUG
	1053	PUSHRF
	1054	; Init com-port
	1055	call AuxIO_Init
	1056	; Hello message
	1057	mov si, offset [AuxIOHello]
	1058	call AuxIO_Print
	1059	; Show Build Info
	1060	call AuxIO_PrintBuildInfo
	1061	call AuxIO_TeletypeNL
	1062	POPRF
	1063	ENDIF
	1064
	1065	; Dump debug information
	1066	IFDEF AUX_DEBUG
	1067	IF 1
	1068	call DEBUG_Dump1
	1069	ENDIF
	1070	ENDIF
	1071
[117]	1072	; Verify we still got the BIOS disk in DL
	1073	IFDEF AUX_DEBUG
	1074	IF 1
[123]	1075	DBG_TEXT_OUT_AUX '## AiR_BOOT_Start ##'
	1076	PUSHRF
[117]	1077	call DEBUG_DumpRegisters
[123]	1078	POPRF
[77]	1079	ENDIF
[117]	1080	ENDIF
[77]	1081
[117]	1082
[51]	1083	; -----------------------------------------------------------------------------
	1084	; IBM-BM BOOT PREPARATION
	1085	; -----------------------------------------------------------------------------
	1086	;
[36]	1087	; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
	1088	; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
	1089	; signature is required at 3000:0000, FS needs to contain 3000h
	1090	; and the 32-bit LBA address needs to follow the 'I13X' signature.
	1091	; For booting IBM-BM from the second disk, a copy of the MBR of the
	1092	; first disk is also required at 0000:7E00.
	1093	; This information is derived from the eCS 2.x LVM MBR.
	1094	;
	1095	; So, now is a good time to copy the MBR of the first disk to
	1096	; 0000:7E00 in case the partition that will be started is IBM-BM.
	1097	; This copy is located at 8000:0000 and DS already points to this
[51]	1098	; segment. The 'I13X' signature and FS will be setup later.
[36]	1099	;
[37]	1100	pusha ; Save all the general purpose regs
	1101	push es ; We need ES too, so save its value
	1102	xor ax,ax ; Segment 0000h
	1103	mov es,ax ; Make ES point to it
	1104	mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
	1105	mov di,7e00h ; Destination for the MBR for IBM-BM
	1106	mov cx,100h ; 256 words = 512 bytes
	1107	cld ; Direction from low to high
	1108	rep movsw ; Copy the 256 words of the MBR
	1109	pop es ; Restore previous value of ES
	1110	popa ; Restore all the general purpose regs
[36]	1111
	1112
[51]	1113	; -----------------------------------------------------------------------------
	1114	; PRECRAP
	1115	; -----------------------------------------------------------------------------
[36]	1116
[51]	1117	;
	1118	; First it clears the BSS area.
[52]	1119	; Note that the old SS:SP is stored outside this area so this
[51]	1120	; does not get lost.
	1121	; Then initialize various runtime variables and structures.
	1122	;
[52]	1123	; BOOKMARK: Pre Crap
[51]	1124	call PRECRAP_Main
	1125	; Number of harddisks and other system-info is now known.
[43]	1126
[117]	1127	;!
	1128	;! DEBUG_BLOCK
	1129	;! Let's see what the BIOS supplied us with...
	1130	;! Uncomment below to activate.
	1131	;!
	1132	IFDEF AUX_DEBUG
	1133	IF 0
	1134	pushf
	1135	pusha
[45]	1136
[117]	1137	; Print title.
	1138	mov si,offset [bios_reg]
	1139	call AuxIO_Print
	1140	; Save the current stack (SS:SP).
	1141	mov ax,ss
	1142	mov [CurrentSS],ax
	1143	mov [CurrentSP],sp
[30]	1144
[117]	1145	; Restore the old stack.
	1146	mov ss,[OldSS]
	1147	mov sp,[OldSP]
[30]	1148
[117]	1149	; Pop the registers with the BIOS values.
	1150	popa
	1151	; Push them back for AiR-BOOT restart (debug mode).
	1152	pusha
	1153	; Dump them to the serial-port.
	1154	call DEBUG_DumpRegisters
	1155	; Restore the current stack.
	1156	mov ax,[CurrentSS]
	1157	mov ss,ax
	1158	mov sp,[CurrentSP]
[30]	1159
[117]	1160	popa
	1161	popf
	1162	ENDIF
	1163	ENDIF
[30]	1164
[51]	1165
[117]	1166
[145]	1167	; -----------------------------------------------------------------------------
	1168	; UPDATE MBR
	1169	; -----------------------------------------------------------------------------
[144]	1170
[145]	1171	; Write MBR back to disk to sync MBR variables.
	1172	; Otherwise subsequent MBR loads will differ from the RAM stored one,
	1173	; which is used by MBR protection to validate parts of the MBR.
	1174	xor bx, bx ; 0000h - our load address (8000:0000)
	1175	mov cx, 1 ; CHS sector 1, cylinder 0
	1176	xor dh, dh ; CHS head 0
	1177	mov dl, [BIOS_BootDisk] ; The disk we were loaded from
	1178	mov al, 1 ; One sector to write
	1179	mov ah, 03h ; BIOS write disk (legacy)
	1180	int 13h ; Call BIOS
[175]	1181	sti ; Enable ints
[145]	1182	;!
	1183	;! TODO: Check success
	1184	;! Yes, we should check for errors here, coz it would mean AirBoot
	1185	;! was loaded from a disk where the MBR cannot be written !
	1186	;!
	1187
[164]	1188
	1189
[51]	1190	; -----------------------------------------------------------------------------
[144]	1191	; SCAN DISKS
[51]	1192	; -----------------------------------------------------------------------------
[77]	1193
[164]	1194	;!
	1195	;! DEBUG_BLOCK
	1196	;! Dump the registers at this point.
	1197	;!
	1198	IFDEF AUX_DEBUG
	1199	IF 0
	1200	PUSHRF
	1201	call DEBUG_DumpRegisters
	1202	;~ call DEBUG_DumpDriveLetters
	1203	;~ call DEBUG_DumpVolumeLetters
	1204	;~ call DEBUG_DumpPartitionXref
	1205	POPRF
	1206	ENDIF
	1207	ENDIF
	1208
	1209
[144]	1210	;
	1211	; Scan disks for information like size etc.
	1212	;
	1213	call DriveIO_ScanDisks
[77]	1214
[164]	1215	;!
	1216	;! DEBUG_BLOCK
	1217	;! Dump the registers at this point.
	1218	;!
	1219	IFDEF AUX_DEBUG
	1220	IF 0
	1221	PUSHRF
	1222	call DEBUG_DumpRegisters
	1223	;~ call DEBUG_DumpDriveLetters
	1224	;~ call DEBUG_DumpVolumeLetters
	1225	;~ call DEBUG_DumpPartitionXref
	1226	POPRF
	1227	ENDIF
	1228	ENDIF
[77]	1229
	1230
[144]	1231	; -----------------------------------------------------------------------------
	1232	; SCAN FOR PARTITIONS
	1233	; -----------------------------------------------------------------------------
[77]	1234
[51]	1235	;
[144]	1236	; Scan disks for partitions
[51]	1237	;
	1238	call PARTSCAN_ScanForPartitions
[144]	1239
	1240	;
[51]	1241	; Internal Partition Table is now populated.
[144]	1242	;
[51]	1243
[117]	1244	;!
	1245	;! DEBUG_BLOCK
	1246	;! Dump various tables.
	1247	;!
	1248	IFDEF AUX_DEBUG
	1249	IF 0
[164]	1250	PUSHRF
[117]	1251	;~ call DEBUG_DumpIPT
	1252	;~ call DEBUG_DumpPartitionPointers
	1253	;~ call DEBUG_DumpNewPartTable
	1254	;~ call DEBUG_DumpDriveLetters
	1255	;~ call DEBUG_DumpDriveLetters
	1256	;~ call DEBUG_DumpVolumeLetters
	1257	;~ call DEBUG_DumpPartitionXref
[164]	1258	POPRF
[117]	1259	ENDIF
	1260	ENDIF
[49]	1261
[30]	1262
[51]	1263	; -----------------------------------------------------------------------------
	1264	; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
	1265	; -----------------------------------------------------------------------------
	1266
	1267	;
	1268	; Reconnect forced drive-letters to their corresponding
	1269	; partitions.
	1270	;
[52]	1271	; BOOKMARK: Update Driveletters so they are in-sync again
[51]	1272	call PARTSCAN_UpdateDriveLetters
	1273	; Driveletter <-> Partition correlation is now restored.
	1274
	1275
	1276
[117]	1277	;!
	1278	;! DEBUG_BLOCK
	1279	;! Dump various tables.
	1280	;!
	1281	IFDEF AUX_DEBUG
	1282	IF 0
[164]	1283	PUSHRF
[117]	1284	;~ call DEBUG_DumpIPT
	1285	;~ call DEBUG_DumpPartitionPointers
	1286	;~ call DEBUG_DumpNewPartTable
	1287	;~ call DEBUG_DumpDriveLetters
	1288	;~ call DEBUG_DumpDriveLetters
	1289	;~ call DEBUG_DumpVolumeLetters
	1290	;~ call DEBUG_DumpPartitionXref
[164]	1291	POPRF
[117]	1292	ENDIF
	1293	ENDIF
[51]	1294
	1295
	1296	; -----------------------------------------------------------------------------
	1297	; SHOW WE ARE ALIVE
	1298	; -----------------------------------------------------------------------------
	1299
	1300	;
	1301	; Put some info about AiR-BOOT and the system on the screen.
	1302	;
	1303
[49]	1304	; Display number of physical disks found
[165]	1305	IFNDEF AUX_DEBUG
	1306	mov [TextPosY], 3
	1307	ELSE
	1308	mov [TextPosY], 4
	1309	ENDIF
	1310	mov [TextPosX], 0
	1311	mov si, offset [DisksFound]
	1312	call VideoIO_Print
[37]	1313	mov al, [TotalHarddiscs]
[165]	1314	mov [TextColorFore], 0fh
[37]	1315	call VideoIO_PrintByteDynamicNumber
[165]	1316	mov [TextColorFore], 07h
[30]	1317
[49]	1318	; Display number of partitions found
[165]	1319	inc [TextPosY]
	1320	mov [TextPosX], 0
	1321	mov si, offset [PartitionsFound]
	1322	call VideoIO_Print
[37]	1323	mov al, [CFG_Partitions]
	1324	call VideoIO_PrintByteDynamicNumber
[30]	1325
[165]	1326	; Display Phase 1 Indicator
	1327	inc [TextPosY]
	1328	mov [TextPosX], 0
	1329	mov si, offset [Phase1]
	1330	call VideoIO_Print
	1331	mov si, offset [OS2_InstallVolume]
	1332	mov al, [si]
	1333	test al,al ; See if phase 1 is active
	1334	jnz @F
	1335	mov si, offset [No]
	1336	@@:
	1337	call VideoIO_Print
[30]	1338
[167]	1339	; Display information about the disks found
	1340	call VideoIO_DisplayDiskInfo
[30]	1341
	1342
	1343
[51]	1344	; -----------------------------------------------------------------------------
[164]	1345	; OS/2 PHASE1 CHECK
[51]	1346	; -----------------------------------------------------------------------------
	1347
	1348	;
[67]	1349	; BOOKMARK: Check for OS/2 being installed
	1350	; Here we check if OS/2 is being installed.
[51]	1351	; If so, we forgo the menu and directly boot it.
	1352	;
	1353
	1354	; If the first byte of the name of the Install Volume is not 0
[49]	1355	; then we potentially have a phase1 boot.
[67]	1356	test byte ptr [OS2_InstallVolume],0ffh
[49]	1357	; Nope, so continue normally.
	1358	jz MBR_Main_ContinueBoot
[36]	1359
[49]	1360	; Setup phase1.
	1361	; It is still possible that a name was set for the
	1362	; Install Volume that does not exist.
	1363	; In that case CY will be clear and AL=0FFh.
	1364	call PART_SetupPhase1
	1365	; Oops, Install Volume not found, continue normally.
	1366	jnc MBR_Main_ContinueBoot
[30]	1367
	1368
[51]	1369	;
[49]	1370	; == Install Volume Found ==
[51]	1371	;
[30]	1372
[51]	1373
[117]	1374	;!
	1375	;! DEBUG_BLOCK
	1376	;! Dump various tables.
	1377	;!
	1378	IFDEF AUX_DEBUG
	1379	IF 0
[164]	1380	PUSHRF
[117]	1381	;~ call DEBUG_DumpIPT
	1382	;~ call DEBUG_DumpPartitionPointers
	1383	;~ call DEBUG_DumpPartitionXref
	1384	;~ call DEBUG_DumpNewPartTable
	1385	;~ call DEBUG_DumpDriveLetters
[164]	1386	POPRF
[117]	1387	ENDIF
	1388	ENDIF
[51]	1389
	1390
[67]	1391	; BOOKMARK: Scan for Partitions (Only if OS/2 install going on)
[51]	1392	; Because one or more partitions are possibly added, the
	1393	; PartitionXref table is not 'in sync' and could cause the
	1394	; wrong system to be automatically booted.
	1395	; So we rescan all partitions causing the PartitionXref
	1396	; table to be filled with correct values so the auto-boot
	1397	; from the new partition will work correctly.
[49]	1398	call PARTSCAN_ScanForPartitions
[30]	1399
	1400
[117]	1401	;!
	1402	;! DEBUG_BLOCK
	1403	;! Dump various tables.
	1404	;!
	1405	IFDEF AUX_DEBUG
	1406	IF 0
[164]	1407	PUSHRF
[117]	1408	;~ call DEBUG_DumpIPT
	1409	;~ call DEBUG_DumpPartitionPointers
	1410	;~ call DEBUG_DumpPartitionXref
	1411	;~ call DEBUG_DumpNewPartTable
	1412	;~ call DEBUG_DumpDriveLetters
[164]	1413	POPRF
[117]	1414	ENDIF
	1415	ENDIF
[30]	1416
[51]	1417	; Setup automatic boot to forgo the Menu.
	1418	; PART_SetupPhase1 has filled in the other variables.
	1419	mov byte ptr [CFG_AutomaticBoot],1
[30]	1420
[51]	1421	;
	1422	; At this point the AiR-BOOT configuration has been altered
	1423	; to automatically boot the newly installed system without
	1424	; displaying the menu.
	1425	; Code further down the road will take care of that.
	1426	;
[49]	1427	jmp MBR_Main_ContinueBoot
[30]	1428
	1429
[49]	1430
	1431
[51]	1432	;
	1433	; Wether a new system is being installed or not,
	1434	; booting continues here.
	1435	;
	1436	MBR_Main_ContinueBoot:
[49]	1437
[51]	1438	;
	1439	; Inform user how to switch between post-screen and menu
	1440	; by putting this info on the screen.
	1441	;
[165]	1442	mov [TextPosY], 23
	1443	mov [TextPosX], 0
	1444	mov si, offset [TABMessage]
	1445	call VideoIO_Print
	1446	inc [TextPosY]
	1447	mov [TextPosX], 57
[37]	1448	call MBR_TeletypeSyncPos
[165]	1449	mov si, offset [PREPMessage]
[37]	1450	call MBR_TeletypeBold
[165]	1451	mov al,30
	1452	call TIMER_WaitTicCount
	1453	mov cl, sizeof [PREPMessage]
	1454	mov al, ' '
	1455	call VideoIO_PrintSingleMultiChar
[30]	1456
[165]	1457	mov [TextPosX], 25
	1458	mov si, offset [BootEndMsg2]
	1459	add si, 39
	1460	mov [TextColorFore], 08h
	1461	call VideoIO_Print
[30]	1462
[164]	1463
[51]	1464	;
	1465	; Debug stop.
	1466	;
[30]	1467
[37]	1468	;
	1469	; ####################### WAIT FOR KEY ########################
	1470	;
[30]	1471
[37]	1472	; Wait for key so we can see debug log if ab-menu hangs.
[49]	1473	;~ xor ax, ax
	1474	;~ int 16h
[37]	1475	;call SOUND_Beep
[30]	1476
	1477
[51]	1478	; Copy BIOS POST to Second Page
[37]	1479	mov ax, VideoIO_Page1
[51]	1480	call VideoIO_BackUpTo
[30]	1481
[37]	1482	;call SOUND_Beep
[30]	1483
	1484
[52]	1485	; BOOKMARK: Save Configuration
[37]	1486	; Save configuration so phase1 boot-through is disabled
	1487	; on next boot.
[67]	1488	mov byte ptr [OS2_InstallVolume], 0
[37]	1489	call DriveIO_SaveConfiguration
[31]	1490
	1491
	1492
[37]	1493	;
[51]	1494	; See if setup needs to be entered.
[37]	1495	;
	1496	MBR_Main_ReEnterSetup:
	1497	call SETUP_CheckEnterSETUP
[7]	1498
[51]	1499	;
	1500	; Do some post processing.
	1501	;
[52]	1502	; BOOKMARK: After Crap
[37]	1503	call AFTERCRAP_Main
[30]	1504
[37]	1505	MBR_Main_ReEnterBootMenuPre:
	1506	; SetUp PartitionPointers for BootMenu (filter non-bootable)
	1507	call PART_CalculateMenuPartPointers
[7]	1508
[37]	1509	; ...and count that one...
[46]	1510	cmp byte ptr [PartitionPointerCount], 0
[37]	1511	jne MBR_Main_SomethingBootAble
	1512	mov si, offset TXT_NoBootAble
	1513	call MBR_Teletype
	1514	jmp MBR_HaltSystem
[30]	1515
[37]	1516	MBR_Main_SomethingBootAble:
	1517	; FixUp Values, define Timed Setup booting, etc.
	1518	call PART_FixUpDefaultPartitionValues
[7]	1519
[30]	1520
	1521
[37]	1522	; -------------------------------------------------- BOOT-MENU
	1523	MBR_Main_ReEnterBootMenu:
	1524	call BOOTMENU_ResetMenuVars ; reset has to be done
[46]	1525	test byte ptr [CFG_AutomaticBoot], 1
[37]	1526	jz MBR_Main_NoAutomaticBooting
[49]	1527
	1528
[37]	1529	; ------------------------------------------ AUTOMATIC BOOTING
	1530	; Select automatic partition, disable automatic booting for
	1531	; next time and boot system...
[46]	1532	mov byte ptr [CFG_AutomaticBoot], 0
[37]	1533	call PASSWORD_AskSystemPwd
	1534	mov al, Menu_EntryAutomatic
[30]	1535
[37]	1536	;mov al, 2
[30]	1537
[37]	1538	mov Menu_EntrySelected, al ; zero based
	1539	jmp MBR_Main_NoBootMenu
[7]	1540
[30]	1541
[49]	1542	MBR_Main_NoAutomaticBooting:
	1543
[37]	1544	;call SOUND_Beep
[30]	1545
[46]	1546	test byte ptr [CFG_BootMenuActive], 0FFh
[37]	1547	jnz MBR_Main_GotBootMenu
	1548	; ----------------------------------------------- NO BOOT-MENU
	1549	; Select default partition and boot system...
	1550	call PASSWORD_AskSystemPwd
[30]	1551
[37]	1552	mov al, Menu_EntryDefault
	1553	;mov al,0 ; zero based
	1554	mov Menu_EntrySelected, al
	1555	jmp MBR_Main_NoBootMenu
[7]	1556
[37]	1557	MBR_Main_GotBootMenu:
	1558	; ------------------------------------------ BOOT-MENU VISUALS
[51]	1559
	1560
	1561	IFDEF FX_ENABLED
[37]	1562	call FX_StartScreen
[51]	1563	ENDIF
[30]	1564
[52]	1565	; BOOKMARK: Build Main Menu
[37]	1566	call BOOTMENU_BuildBackground
	1567	call BOOTMENU_BuildMain
[51]	1568
	1569	IFDEF FX_ENABLED
[37]	1570	call FX_EndScreenRight
[51]	1571	ENDIF
	1572
[37]	1573	call PASSWORD_AskSystemPwd
	1574	call BOOTMENU_ResetTimedBoot
[30]	1575
[52]	1576	; BOOKMARK: Display Main Menu
[37]	1577	call BOOTMENU_Execute
[30]	1578
[37]	1579	jc MBR_Main_ReEnterSetup
	1580	call BOOTMENU_SetVarsAfterMenu
[30]	1581
[37]	1582	; ---------------------------------------------------- BOOTING
	1583	MBR_Main_NoBootMenu:
[51]	1584
	1585	IFDEF FX_ENABLED
[37]	1586	call FX_StartScreen
[51]	1587	ENDIF
	1588
[164]	1589	IFDEF AUX_DEBUG
	1590	IF 0
	1591	DBG_TEXT_OUT_AUX 'HALTING'
	1592	PUSHRF
	1593	;~ call DEBUG_DumpRegisters
	1594	;~ call AuxIO_DumpParagraph
	1595	;~ call AuxIO_TeletypeNL
	1596	@@: jmp @B
	1597	POPRF
	1598	ENDIF
	1599	ENDIF
[52]	1600	; BOOKMARK: Display bye-screen and start selected partition
[37]	1601	call BOOTMENU_BuildGoodBye
[51]	1602
	1603	IFDEF FX_ENABLED
[37]	1604	call FX_EndScreenRight
[51]	1605	ENDIF
	1606
[37]	1607	call PASSWORD_AskChangeBootPwd
[7]	1608
[37]	1609	call ANTIVIR_SaveBackUpMBR
[7]	1610
[49]	1611	; Preload the selected menu-entry
[67]	1612	; However, this value will be wrong if OS/2 phase1 is
[49]	1613	; active and the installation partition is newly created.
	1614	; See below for the adjustment.
	1615	mov dl, byte ptr [Menu_EntrySelected]
	1616
[51]	1617
	1618	;
	1619	; Prepare to start the partition.
	1620	;
[49]	1621	jmp MBR_Main_StartPartition
	1622
	1623
	1624
[51]	1625	; -----------------------------------------------------------------------------
	1626	; START PARTITION
	1627	; -----------------------------------------------------------------------------
	1628
[49]	1629	MBR_Main_StartPartition:
	1630
[117]	1631	IFDEF AUX_DEBUG
	1632	IF 0
[164]	1633	PUSHRF
[117]	1634	;~ call DEBUG_DumpIPT
	1635	;~ call DEBUG_DumpPartitionPointers
	1636	;~ call DEBUG_DumpPartitionXref
	1637	;~ call DEBUG_DumpNewPartTable
[164]	1638	POPRF
[117]	1639	ENDIF
	1640	ENDIF
[49]	1641
	1642
[37]	1643	; -------------------------------------------- START PARTITION
[51]	1644	; THIS DOES NOT RETURN !
[37]	1645	call PART_StartPartition
[30]	1646
	1647
[31]	1648
[51]	1649
[30]	1650	;
[51]	1651	; This entry-point restarts AiR-BOOT almost from scratch.
	1652	; It skips the movement of the MBR but otherwise it is a functional restart.
	1653	; The old BIOS SS:SP where the registers on entry are stored is passed along.
[52]	1654	; This entry-point is used for debugging purposes.
[51]	1655	;
[52]	1656	; BOOKMARK: AiR-BOOT Restart (used for debugging)
[51]	1657	AirbootRestart:
[79]	1658	mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
	1659	mov cx, [OldSS] ; Old SS when BIOS transferred control to AB
	1660	xor dh, dh ; Head 0
	1661	mov dl, [BIOS_BootDisk] ; Disk AirBoot was loaded from
[51]	1662	jmp MBR_RealStart
	1663
	1664
	1665	;
	1666	; This entry-point displays a popup that the system is halted
	1667	; and then halts the system.
	1668	; It is entered on severe error conditions.
	1669	;
[52]	1670	; BOOKMARK: Halt System
[51]	1671	HaltSystem:
	1672	call VideoIO_ClearScreen
	1673	mov ax,0ababh
	1674	mov cx, 0C04h
	1675	mov si, offset SystemHalted
	1676	call SETUP_ShowErrorBox
	1677	; Halt the system.
	1678	jmp MBR_HaltSystem
	1679
	1680
	1681
	1682
	1683
	1684
	1685	;
[52]	1686	; The following section includes various assembler modules
	1687	; at the source level. These contain functionality for a
	1688	; multitude of categories like disk-access, video-io, lvm,
	1689	; debugging, etc. Later versions of AiR-BOOT will use such
	1690	; modules at the object-file level so they can be shared
	1691	; more easily.
[51]	1692	;
	1693
	1694
	1695	; -----------------------------------------------------------------------------
	1696	; INCLUDED FILE SECTION
	1697	; -----------------------------------------------------------------------------
	1698
[52]	1699	; BOOKMARK: Include Section
	1700
[51]	1701	;
[30]	1702	; Include other code-modules here.
	1703	;
[51]	1704
[30]	1705	b_std_txt:
[60]	1706	include regular/std_text.asm ; Standard (non-translateable text)
[30]	1707	size_std_txt = $-b_std_txt
	1708
	1709	b_driveio:
[60]	1710	include regular/driveio.asm ; Drive I/O, Config Load/Save
[30]	1711	size_driveio = $-b_driveio
	1712
[43]	1713	b_lvm:
[60]	1714	include special/lvm.asm ; LVM-specific code
[43]	1715	size_lvm = $-b_lvm
	1716
[30]	1717	b_videoio:
[60]	1718	include regular/videoio.asm ; Video I/O
[30]	1719	size_videoio = $-b_videoio
	1720
	1721	b_timer:
[60]	1722	include regular/timer.asm ; Timer
[30]	1723	size_timer = $-b_timer
	1724
	1725	b_partmain:
[60]	1726	include regular/partmain.asm ; Regular Partition Routines
[30]	1727	size_partmain = $-b_partmain
	1728
	1729	b_partscan:
[60]	1730	include regular/partscan.asm ; Partition Scanning
[30]	1731	size_partscan = $-b_partscan
	1732
	1733	b_bootmenu:
[60]	1734	include regular/bootmenu.asm ; Boot-Menu
[30]	1735	size_bootmenu = $-b_bootmenu
	1736
	1737	b_password:
[60]	1738	include regular/password.asm ; Password related
[30]	1739	size_password = $-b_password
	1740
	1741	b_other:
[60]	1742	include regular/other.asm ; Other Routines
[30]	1743	size_other = $-b_other
[7]	1744
[30]	1745	b_main:
[60]	1746	include setup/main.asm ; The whole AiR-BOOT SETUP
[30]	1747	size_main = $-b_main
	1748
	1749	b_math:
[60]	1750	include regular/math.asm ; Math functions (like 32-bit multiply)
[30]	1751	size_math = $-b_math
	1752
	1753	b_txtother:
[186]	1754	include_from text/%BLD_LANG,other.asm ; All translateable Text-Strings
[30]	1755	size_txtother = $-b_txtother
	1756
	1757	b_txtmenus:
[186]	1758	include_from text/%BLD_LANG,menus.asm ; All translateable Menu-text
[30]	1759	size_txtmenus = $-b_txtmenus
	1760
	1761	b_charset:
[60]	1762	include text/charset.asm ; Special Video Charsets (if needed)
[30]	1763	size_charset = $-b_charset
	1764
[36]	1765	b_conv:
[60]	1766	include regular/conv.asm ; Various conversion routines
[36]	1767	size_conv = $-b_conv
[30]	1768
	1769	b_virus:
[60]	1770	include special/virus.asm ; Virus Detection / Anti-Virus
[30]	1771	size_virus = $-b_virus
[51]	1772
[30]	1773	b_billsuxx:
[60]	1774	include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
[30]	1775	size_billsuxx = $-b_billsuxx
	1776
	1777	b_sound:
[60]	1778	include special/sound.asm ; Sound
[30]	1779	size_sound = $-b_sound
	1780
	1781	b_apm:
[60]	1782	include special/apm.asm ; Power Managment Support
[30]	1783	size_apm = $-b_apm
	1784
[51]	1785
	1786
	1787	;
	1788	; Cyrillic support.
	1789	;
	1790	IFDEF TXT_IncludeCyrillic
	1791	b_ccharset:
[60]	1792	include special/charset.asm ; Charset Support (e.g. Cyrillic)
[51]	1793	size_ccharset = $-b_ccharset
	1794	ENDIF
	1795
	1796	; Various debugging routines, uses AUXIO and CONV
	1797	IFDEF AUX_DEBUG
	1798	b_debug:
[60]	1799	include regular/debug.asm ; Debug module
[51]	1800	size_debug = $-b_debug
	1801	b_auxio:
[60]	1802	include regular/auxio.asm ; Com-port support for debugging
[51]	1803	size_auxio = $-b_auxio
	1804	ENDIF
	1805
	1806	;
	1807	; We only include this if FX_ENABLED is defined.
	1808	; FX is disabled when debugging to have more room for debug-code.
	1809	; The module compiles to 50eh = 1294 bytes, so that is a lot.
	1810	;
	1811	IFDEF FX_ENABLED
[30]	1812	b_fx:
[60]	1813	include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
[30]	1814	size_fx = $-b_fx
[51]	1815	ENDIF
[30]	1816
	1817
[51]	1818	;
	1819	; End of code marker.
	1820	;
[52]	1821	; BOOKMARK: END OF CODE
[51]	1822	db 'BABE'
	1823	db 'FACE'
[30]	1824
[47]	1825
[51]	1826	; -----------------------------------------------------------------------------
	1827	; END OF CODE
	1828	; -----------------------------------------------------------------------------
	1829	code_end:
	1830
	1831
	1832
	1833
	1834
	1835
	1836
	1837
	1838
	1839
	1840	; -----------------------------------------------------------------------------
	1841	; BLDLEVEL INFORMATION
	1842	; -----------------------------------------------------------------------------
	1843
[52]	1844	; BOOKMARK: BLDLEVEL Information
[51]	1845	ORIGIN 068A0h
	1846
	1847	;
	1848	; The space between this offset and code_end is the space
	1849	; available for code.
	1850	;
	1851	zzz_code_space = $ - code_end
	1852
	1853
[46]	1854	bld_level:
[43]	1855	;
[46]	1856	; Here we insert the OS/2 BLDLEVEL Information.
	1857	; It is composed of the AiR-BOOT version-info and other
[51]	1858	; information. It is unique for each release of AiR-BOOT.
[46]	1859	;
[51]	1860
	1861	;
[47]	1862	; ?? When AUX_DEBUG is enabled and the above org is active,
	1863	; the BLDLEVEL gets corrupted eventhough it gets inserted here
	1864	; explicitly. The effect is almost like an 'OR' or a merge
	1865	; with the already generated FX code.
	1866	; Tasm and JWasm produce different results.
	1867	; ??
	1868	;
[46]	1869	InsertBuildLevel
	1870
[47]	1871
[30]	1872
[7]	1873
	1874
[51]	1875	;==============================================================================
	1876	; Sector 53
	1877	;==============================================================================
	1878
[45]	1879	;
[51]	1880	; From here on, the layout of the image consists of:
	1881	; - AiR-BOOT Protection Image
	1882	; - AiR-BOOT Configuration
	1883	; - DriveLetters
	1884	; - Install Volume
	1885	; - Floppy/CDROM/BIOS BOOT ENTRIES
	1886	; - Internal Partition Table (IPT)
	1887	; - Hidden Partition Table (HPT)
	1888	; - MBR Backup
[45]	1889	;
[7]	1890
[37]	1891	;
[51]	1892	; After that, the BSS follows with several runtime
	1893	; variables and structures.
	1894	; The BSS is not part of the image on disk of course.
	1895	;
	1896
	1897	; -----------------------------------------------------------------------------
	1898	; PROTECTION IMAGE
	1899	; -----------------------------------------------------------------------------
	1900
	1901	;
[52]	1902	; This is the AiR-BOOT MBR Protection Image.
[46]	1903	; The stuff generated here gets overwritten when the
[51]	1904	; MBR_PROT module, which is assembled separately,
	1905	; gets binary merged.
[37]	1906	; So you won't find the string below in the generated binary.
	1907	;
[52]	1908	; BOOKMARK: AiR-BOOT MBR Protection Image
[51]	1909	ORIGIN 06900h
[46]	1910
	1911
[51]	1912
	1913
[46]	1914	;
[51]	1915	; Hardcoded to 768 bytes (MBR_PROT.ASM)
[46]	1916	; The string below is searched for by the FIXCODE helper and must be
[51]	1917	; page (256 bytes) aligned.
[46]	1918	;
[51]	1919	; It seems to be possible to shrink the protection-image to 768 bytes.
	1920	; That gives us an additional 256 bytes of code-space.
	1921	; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
	1922	; Also the granularity needs to change from 512 bytes to 256 bytes since
	1923	; 6900h is not a 512-byte boundary.
	1924	;
	1925	; 20120908 - Done.
	1926	;
[37]	1927	MBR_Protection db 'AiR-BOOT MBR-Protection Image'
	1928
[43]	1929	; Just fill.
[51]	1930	;~ db 1024-($-MBR_Protection) dup('M')
	1931	db 768-($-MBR_Protection) dup('M')
[37]	1932
	1933
[51]	1934
	1935
	1936
	1937
	1938
[31]	1939	;==============================================================================
[51]	1940	; Sector 55
	1941	;==============================================================================
	1942	; -----------------------------------------------------------------------------
	1943	; AiR-BOOT CONFIGURATION
	1944	; -----------------------------------------------------------------------------
[30]	1945
[37]	1946	;
	1947	; This section contains the AiR-BOOT configuration.
	1948	; Note that it has a version that should be updated
	1949	; when stuff is added.
	1950	; Also add stuff to the end so that offsets of other
	1951	; variables remain vaild.
	1952	;
[52]	1953	; BOOKMARK: AiR-BOOT Configuration Sector
[45]	1954	ORIGIN 06C00h
[30]	1955
[37]	1956	Configuration:
[69]	1957	; This is the signature for the AiR-BOOT Configuration.
	1958	; Note that this configuration section, like the code section,
	1959	; is CRC protected. This means that poking values in these
	1960	; sections on the disk will invalidate AiR-BOOT and cause it
	1961	; to halt. This is a protection method against other software
	1962	; modifying stuff in track 0.
	1963	db 'AiRCFG-TABLE',0adh
[55]	1964	db 01h, 10h, 'U' ; "Compressed" ID String
[37]	1965	; Version 1.02 was for code 1.06, 1.03 was internal
	1966	; and 1.04,1.05 and 1.06 do not exist.
[46]	1967	;
	1968	; 1.07 was used with AB v1.07 and introduced the phase1
	1969	; system-name. For the rest it is compatible with v1.02.
	1970	;
	1971	; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
	1972	; of several components and the packing of the hideparttable.
	1973	; The core configuration has not changed but the generated
	1974	; configuration has. The v1.0.8 installer handles upgrading.
	1975	;
[54]	1976	; It has been decided that uneven minor numbers will be
	1977	; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
[60]	1978	;
[37]	1979	; It is not required for the config to have the
	1980	; same version as the code, so in the future
	1981	; the code version might be higher than the
	1982	; config version if there are no changes to the latter.
[46]	1983	;
[7]	1984
[37]	1985	CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
	1986	CFG_LastTimeEditHi dw 0 ; second 16 bit part...
[7]	1987
[37]	1988	CFG_CheckConfig dw 0 ; Check-Sum for Configuration
[7]	1989
[37]	1990	CFG_Partitions db 0 ; Count of partitions in IPT
[51]	1991	CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
[37]	1992	CFG_PartDefault db 0 ; Default-Partition (Base=0)
[7]	1993
[37]	1994	CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
[176]	1995	CFG_TimedBoot db 1 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
[37]	1996	CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
	1997	CFG_TimedDelay dw 123 ; Timed Boot - Delay
	1998	CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
	1999	CFG_RememberBoot db 1 ; Remember Manual Boot Choice
	2000	CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
	2001	CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
	2002	CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
[7]	2003	; v0.29+ -> 2 - Detailed Bootmenu
[37]	2004	CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
	2005	CFG_PasswordSetup db 0 ; Ask Password when entering Setup
	2006	CFG_PasswordSystem db 0 ; Ask Password when booting System
	2007	CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
	2008	CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
	2009	CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
	2010	CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
	2011	CFG_DetectVirus db 0 ; Detect Virus ?
	2012	CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
	2013	CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
	2014	CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
	2015	CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
	2016	dw 07A53h
	2017	dw 0E797h
	2018	dw 0A896h
	2019	CFG_BootPassword dw 0101Fh ; Another CR... ;-)
	2020	dw 07A53h
	2021	dw 0E797h
	2022	dw 0A896h
	2023	db 0 ; Rude-Protection - Removed since v0.28b
	2024	CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
	2025	CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
	2026	; 0 - Do Nothing
	2027	; 1 - Reset Time
	2028	; 2 - Stop Time
	2029	CFG_MakeSound db 0 ; Should be clear ;)
	2030	CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
[51]	2031	CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
[37]	2032	; 0 - Disabled
	2033	; 1 - CD-ROM
	2034	; 2 - Network
	2035	; 3 - ZIP/LS120
	2036	CFG_CooperBars db 0 ; If Cooper Bars should be shown
	2037	CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
	2038	CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
	2039	; FFh -> Disabled
	2040	CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
	2041	CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
	2042	CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
	2043	CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
	2044	CFG_PartAutomatic db 0 ; Partition-No for automatic booting
	2045	CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
	2046	CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
[7]	2047
[30]	2048
	2049	;
	2050	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2051	;
	2052
[45]	2053	;
	2054	; Drive Letters.
	2055	;
[52]	2056	; BOOKMARK: Stored Drive Letters
[45]	2057	ORIGIN 06CB0h
[30]	2058
	2059
[51]	2060	; -----------------------------------------------------------------------------
	2061	; DRIVE LETTERS
	2062	; -----------------------------------------------------------------------------
	2063
[45]	2064	;
	2065	; Moved here to make room for packed hiddenparttable.
[71]	2066	; This gets filled with drive-letters that are assigned using the dl-feature.
[45]	2067	;
	2068	DriveLetters db LocIPT_MaxPartitions dup (0)
	2069	; Format is:
	2070	;============
	2071	; Drive-Letter : BYTE (80h-C:, 81h-D:)
	2072	; --------------------> 1 Byte * 45
[30]	2073
[51]	2074
	2075
	2076	; -----------------------------------------------------------------------------
	2077	; INSTALL VOLUME
	2078	; -----------------------------------------------------------------------------
	2079
[45]	2080	;
[37]	2081	; Allways have the name of the installation volume
	2082	; at this offset.
	2083	; So future config changes will not break auto-install.
[45]	2084	;
[67]	2085	; BOOKMARK: Name of OS/2 Installation Volume
[45]	2086	ORIGIN 06D00h
[37]	2087
[67]	2088	; SET(A)BOOT stores the volume name of the OS/2 system being installed here.
[31]	2089	; It is truncated to 11 chars because AiR-BOOT currently does not support
	2090	; longer labelnames. The name is also capitalized.
[67]	2091	OS2_InstallVolume db 0,'NOPHASEONE' ,0
[30]	2092
[37]	2093	;
	2094	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2095	;
	2096
[51]	2097
	2098	; -----------------------------------------------------------------------------
	2099	; FLOPPY/CDROM/BIOS BOOT ENTRIES
	2100	; -----------------------------------------------------------------------------
	2101
[37]	2102	;
	2103	; 06DABh - 06C00h = 01ABh = 427 bytes.
	2104	; Entries allocated down from 06E00 boundary.
	2105	;
[52]	2106	; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
[46]	2107	ORIGIN 06DABh ; 427 Boundry
[37]	2108
	2109	; (432 - 5 = 427)
	2110	AutoDrvLetter db 0
	2111	AutoDrvLetterSerial dd 0
	2112
	2113	; This entry is also 34 bytes long (466 - 34 = 432)
	2114	BIOScontIPTentry:
	2115	db 0, 0, 0, 0, ' '
	2116	db 0, 0FEh, Flags_Bootable
	2117	dw 0 ; No Checksum :)
	2118	db 0, 1, 0
	2119	db 0, 1, 0 ; Location of Partition/Boot Record
	2120	dd 0, 0
	2121
[7]	2122	; VIR variables are for the AiR-BOOT Anti Virus Code
	2123	; Most of them are backups of Interrupt Points, so we can check, if a
	2124	; stealth virus is on-line, we can intercept its call.
	2125	; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
[46]	2126	; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
	2127	; system from working, so the user has to press reset.
	2128	; That's saver than a Reboot.
[7]	2129	;
	2130	; If a virus is found on the partition to boot, the system will ONLY halt,
	2131	; nothing more, because we can not remove it. The user shall do it :)
	2132	; Those viruses are detected via a real nasty method...Checksum-Checking of the
	2133	; boot-record, which is to be executed. If it does not match the one in our
	2134	; internal partition table, we will stop. You may however switch this detection
	2135	; off or just reset it by switching 'VIBR Detection'.
	2136
[37]	2137	; 478 - 12 = 466 ; 466 Sub-Part
	2138	CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
	2139	CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
	2140	CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
[30]	2141
[37]	2142	; 478 Boundry (512-34)
	2143	; This entry is also 34 bytes long
	2144	FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
	2145	db 0, 0FFh, Flags_Bootable
	2146	dw 0 ; No Checksum :)
	2147	db 0, 1, 0
	2148	db 0, 1, 0 ; Location of Partition/Boot Record
	2149	dd 0, 0
[30]	2150
	2151
[51]	2152
	2153	; -----------------------------------------------------------------------------
	2154	; INTERNAL PARTITION TABLE (IPT)
	2155	; -----------------------------------------------------------------------------
	2156
[45]	2157	;
	2158	; AiR-BOOT Internal Partition Table (IPT)
	2159	;
[52]	2160	; BOOKMARK: Internal Partition Table
[45]	2161	ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
[30]	2162
	2163
[45]	2164	;
	2165	; Rousseau: This is the start of the AiR-BOOT IPT
	2166	;
	2167	PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
	2168	; no-partitions detected... :]
[7]	2169	; db 1, 0, 0, 0, 'Harddisc 1'
	2170	; db 0, 0FFh, Flags_BootAble
	2171	; dw 0 ; No Checksum :)
	2172	; db 0, 0, 1
[46]	2173	; db 0, 0, 1 ; Location of Partition/Boot Record
[7]	2174	; dd 0, 0
	2175
[37]	2176	; Format is:
	2177	;============
	2178	; SerialNumber * 4
	2179	; PartitionName * 11
	2180	; Drive * 1
	2181	; SystemID * 1 (means the partition type)
	2182	; Flags * 1
	2183	; Checksum * 2 (for virus checking)
	2184	; LocationBegin * 3 (where the partition begins)
	2185	; LocationPartTab * 3 (where the partition table is)
	2186	; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
	2187	; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
	2188	; --------------------> 34 Bytes (total maximum partition-entries = 30)
[7]	2189
[30]	2190
[37]	2191
	2192	; No need to check overlap here because this string will
	2193	; be overwritten if the maximum partition count is reached.
	2194	; So this is not a critical boundary.
[45]	2195	ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
[37]	2196
	2197	db 'AiRBOOTPAR' ; 1K internal partition table
[30]	2198
	2199
	2200
[51]	2201	; -----------------------------------------------------------------------------
	2202	; HIDDEN PARTITION TABLE (HPT)
	2203	; -----------------------------------------------------------------------------
[30]	2204
[45]	2205	;
	2206	; Hidden Partition Table (6-bit packed as of v1.0.8)
	2207	;
[52]	2208	; BOOKMARK: Hidden Partition Table (packed)
[45]	2209	ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
[30]	2210
[38]	2211	HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
[37]	2212	; Format is:
	2213	;============
	2214	; PartitionPtr : BYTE * 30
[38]	2215	; --------------------> 30 Bytes * 45
[30]	2216
[37]	2217	;
[45]	2218	; Driveletters were here.
	2219	; Moved down to make room for packed hideparttable.
	2220	;
[30]	2221
[37]	2222
[45]	2223	;
	2224	; End of hidden partition table.
	2225	; Check overlap here for security reasons.
	2226	;
	2227	ORIGIN % (image_size - 200h - 5)
[30]	2228
[45]	2229	; 79fa - end of packed hide table
	2230	db 'ABHID' ; 1K internal Hide-partition table
[30]	2231
	2232
	2233
	2234
[51]	2235	;==============================================================================
	2236	; Sector 62
	2237	;==============================================================================
	2238	; -----------------------------------------------------------------------------
	2239	; MBR BACKUP
	2240	; -----------------------------------------------------------------------------
[37]	2241
[45]	2242	;
	2243	; AiR-BOOT MBR Backup.
	2244	;
[52]	2245	; BOOKMARK: MBR Backup
[45]	2246	ORIGIN % (image_size - 200h)
[37]	2247
[31]	2248
[46]	2249	MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
	2250	' - Just to fill this sector with something',0
[37]	2251	AirBootRocks db 'AiR-BOOT Rocks!',0
[7]	2252
[45]	2253	db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
[36]	2254
[45]	2255	; End of Image signature.
	2256	;
	2257	ORIGIN % (image_size - 2)
	2258	dw 0BABEh
[30]	2259
	2260
[45]	2261	;
	2262	; End of Image.
	2263	;
	2264	ORIGIN % (image_size)
[97]	2265	image_end:
[30]	2266
	2267	;
[51]	2268	; Terminate LDRIMAGE segment.
[30]	2269	;
[51]	2270	IFDEF SEGMENTED
[43]	2271	LDRIMAGE ENDS
[51]	2272	ENDIF
[30]	2273
[37]	2274
[51]	2275
	2276
	2277
	2278
	2279
	2280	;##############################################################################
	2281	; BSS SEGMENT
	2282	;##############################################################################
	2283
[52]	2284	; BOOKMARK: BSS Segment
[51]	2285
[30]	2286	;
[51]	2287	; Open BSS segment.
[30]	2288	;
[51]	2289	IFDEF SEGMENTED
[37]	2290	VOLATILE SEGMENT USE16 PUBLIC 'BSS'
	2291	ENDIF
	2292
[46]	2293
	2294
[30]	2295	sobss:
[112]	2296	sobss_abs = offset sobss + image_size
[31]	2297	;------------------------------------------------------------------------------
[46]	2298
	2299
[112]	2300	;
	2301	; This is the actual start of the BSS.
	2302	; In the past however, we have had a code-loop that went out of bounds,
	2303	; overwriting the start of the BSS.
	2304	;
	2305	; Because important runtime data is stored in the BSS, we offset it
	2306	; by 400h bytes. Since the loader-image is always 62 sectors, which
	2307	; makes it 7c00h in size, the runtime data starts at 8000h.
	2308	; This is the 'BeginOfVariables' location.
	2309	;
[37]	2310
[112]	2311
[46]	2312	;
	2313	; If segmented, offsets are relative to the BSS segment.
	2314	; They are resolved at link-time.
	2315	; If not segmented, offsets are relative to the CODE segment.
	2316	;
	2317	IFDEF SEGMENTED
[112]	2318	ORG 00400h ; 7c00h + 400h = 8000h
[46]	2319	ELSE
[112]	2320	ORG 08000h ; 8000h
[46]	2321	ENDIF
	2322
	2323
[51]	2324	; -----------------------------------------------------------------------------
	2325	; START OF BSS DATA
	2326	; -----------------------------------------------------------------------------
[7]	2327	; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
	2328	BeginOfVariables:
[112]	2329	BeginOfVariablesAbs = offset BeginOfVariables + image_size
[51]	2330
	2331
	2332	; -----------------------------------------------------------------------------
	2333	; SECTOR BUFFERS
	2334	; -----------------------------------------------------------------------------
[52]	2335	; BOOKMARK: Sector Buffers
[46]	2336	PartitionSector db 512 dup (?) ; Temporary Sector for Partition
[51]	2337	PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
[46]	2338	LVMSector db 512 dup (?) ; Temporary Sector for LVM
	2339	TmpSector db 512 dup (?) ; Temporary Sector
[82]	2340	Scratch db 512 dup (?) ; Scratch buffer
[112]	2341	ALIGN 16
[30]	2342
[112]	2343
[51]	2344	; -----------------------------------------------------------------------------
	2345	; NEW PARTITION TABLE
	2346	; -----------------------------------------------------------------------------
[7]	2347	; Everything used to build a new IPT and reference it to the old one
[52]	2348	; BOOKMARK: New Partition Table
[46]	2349	NewPartTable db 1536 dup (?) ; New Partition Table
[112]	2350	ALIGN 16
[43]	2351
[51]	2352
	2353	; -----------------------------------------------------------------------------
	2354	; NEW HIDE PARTITION TABLE
	2355	; -----------------------------------------------------------------------------
[52]	2356	; BOOKMARK: New Hide-Partition Table
[51]	2357	NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
[112]	2358	ALIGN 16
[7]	2359
[51]	2360
	2361	; -----------------------------------------------------------------------------
	2362	; NEW DRIVE LETTERS
	2363	; -----------------------------------------------------------------------------
[52]	2364	; BOOKMARK: Logical Drive-Letters
[51]	2365	NewDriveLetters db LocIPT_MaxPartitions dup (?)
[112]	2366	ALIGN 16
[7]	2367
[51]	2368
	2369	; -----------------------------------------------------------------------------
	2370	; PARTITION SIZE TABLE
	2371	; -----------------------------------------------------------------------------
[46]	2372	; Size-Table (6 bytes per partition)
[52]	2373	; BOOKMARK: Partition Size Table
[51]	2374	PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
[112]	2375	ALIGN 16
[46]	2376
[51]	2377
	2378	; -----------------------------------------------------------------------------
	2379	; PARTITION POINTERS
	2380	; -----------------------------------------------------------------------------
[49]	2381	; Maximum is 52 word entries till now
[52]	2382	; BOOKMARK: Partition Pointers
[46]	2383	PartitionPointers dw 52 dup (?)
[112]	2384	ALIGN 16
[46]	2385
	2386	; Count of total Partition Pointers
	2387	PartitionPointerCount db ?
[112]	2388	ALIGN 16
[46]	2389
[112]	2390
[51]	2391	; -----------------------------------------------------------------------------
	2392	; XREF TABLE
	2393	; -----------------------------------------------------------------------------
[46]	2394	; X-Reference Table (holds new partnr, index is old part nr)
[52]	2395	; BOOKMARK: Xref Table
[51]	2396	PartitionXref db LocIPT_MaxPartitions dup (?)
[112]	2397	ALIGN 16
[46]	2398
[112]	2399
[51]	2400	; -----------------------------------------------------------------------------
	2401	; VOLUME LETTERS
	2402	; -----------------------------------------------------------------------------
[46]	2403	; Volume-Letters
	2404	; 0 - no LVM support
	2405	; 1 - LVM support, but no letter
	2406	; 'C'-'Z' - assigned drive letter
[52]	2407	; BOOKMARK: Volume Drive Letters
[51]	2408	PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
[112]	2409	ALIGN 16
[46]	2410
	2411
[51]	2412	; -----------------------------------------------------------------------------
	2413	; MISC VARS AND FLAGS
	2414	; -----------------------------------------------------------------------------
[52]	2415	; BOOKMARK: Misc Vars and Flags
[46]	2416	TotalHarddiscs db ? ; Total harddrives (by POST)
	2417	LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
	2418	NewPartitions db ? ; Freshly found partitions
[37]	2419	; Independent of SaveConfiguration
[46]	2420	TooManyPartitions db ? ; Non-zero if too many partitions found
[7]	2421
[46]	2422	VideoIO_Segment dw ? ; Segment for Video I/O
[7]	2423
[46]	2424	ExtendedAbsPos dd ? ; Extended Partition Absolute Position
	2425	ExtendedAbsPosSet db ? ; If Absolute Position set
[7]	2426
[46]	2427	CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
	2428	CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
	2429	; (filled out by PreCrap)
	2430	CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
[37]	2431	; (for detailed error message)
[112]	2432	ALIGN 16
[7]	2433
	2434
[51]	2435	; -----------------------------------------------------------------------------
	2436	; MENU RELATED VARS
	2437	; -----------------------------------------------------------------------------
[46]	2438	Menu_EntrySelected db ? ; Which partition we boot this time...
	2439	Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
	2440	Menu_AbsoluteX db ? ; Pos where Menu stuff starts
	2441	Menu_TotalParts db ? ; Copy of CFG_BootParts
	2442	Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
	2443	Menu_EntryDefault db ? ; Default Entry in filtered View
	2444	Menu_EntryLast db ? ; LastBooted Entry in filtered View
	2445	Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
[7]	2446	; - All adjusted to menu locations
[112]	2447	ALIGN 16
[7]	2448
[112]	2449
[51]	2450	; -----------------------------------------------------------------------------
	2451	; PARTITION RELATED VARS
	2452	; -----------------------------------------------------------------------------
[46]	2453	PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
	2454	PartSetup_ActivePart db ? ; Active Partition
	2455	PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
	2456	PartSetup_HiddenX db ? ; Pos for Hidden-Setup
	2457	PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
[112]	2458	ALIGN 16
[7]	2459
[112]	2460
[51]	2461	; -----------------------------------------------------------------------------
	2462	; TIMER / SETUP RELATED VARS
	2463	; -----------------------------------------------------------------------------
[46]	2464	TimedBootEnable db ? ; Local Enable/Disable for timed boot
	2465	TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
	2466	TimedSecondLeft db ? ; How many seconds are left till boom ?
	2467	TimedSecondBack db ? ; To get a modification noticed
	2468	TimedBootUsed db ? ; Timed Boot used for bootup ?
	2469	FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
	2470	SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
	2471	SETUP_ExitEvent db ? ; Exit Event to end SETUP
	2472	TempPasswordEntry db 17 dup (?)
	2473	SETUP_OldPwd db 17 dup (?)
	2474	SETUP_NewPwd db 17 dup (?)
	2475	SETUP_VerifyPwd db 17 dup (?)
	2476	StartSoundPlayed db ?
	2477	ChangePartNameSave db ? ; Save label after user-edit ?
	2478	SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
[112]	2479	ALIGN 16
[7]	2480
[51]	2481
	2482	; -----------------------------------------------------------------------------
	2483	; FX RELATED VARS
	2484	; -----------------------------------------------------------------------------
[37]	2485	FX_UseCount dw ?
	2486	FX_OverallTimer dw ?
	2487	FX_WideScrollerTimer dw ?
	2488	FX_WideScrollerCurPos dw ?
	2489	FX_WideScrollerSpeed db ?
	2490	FX_WideScrollerSpeedState db ?
	2491	FX_WideScrollerDirection db ?
	2492	FX_WideScrollerAbsDirection db ?
	2493	FX_WideScrollerBounceSpeed db ?
	2494	FX_CooperBarsTimer dw ?
[112]	2495	ALIGN 16
[7]	2496
[51]	2497	; Dynamically Generated Tables - do not need to get initialized with NUL
	2498	FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
	2499	FX_CooperState db 7 dup (?)
	2500	FX_SinusPos db 7 dup (?)
	2501	FX_CooperPos dw 7 dup (?)
[112]	2502	ALIGN 16
[51]	2503
	2504
	2505	; -----------------------------------------------------------------------------
	2506	; CHARSET BUFFER
	2507	; -----------------------------------------------------------------------------
	2508	CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
[112]	2509	ALIGN 16
[51]	2510
[112]	2511
[51]	2512	; -----------------------------------------------------------------------------
	2513	; LVM CRC TABLE
	2514	; -----------------------------------------------------------------------------
	2515	LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
[112]	2516	ALIGN 16
[51]	2517
[7]	2518
[51]	2519	; -----------------------------------------------------------------------------
[138]	2520	; LVM DRIVE-LETTER MAP
[51]	2521	; -----------------------------------------------------------------------------
[138]	2522	; Get's initialized at startup to: 00000011111111111111111111111100b
	2523	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	2524	; Each partition with an assigned drive-letter clears a bit in this map.
	2525	FreeDriveletterMap dd ?
[112]	2526	ALIGN 16
[30]	2527
[51]	2528
	2529	; -----------------------------------------------------------------------------
[138]	2530	; OS/2 PHASE1 RELATED
[51]	2531	; -----------------------------------------------------------------------------
[138]	2532	Phase1Active db ?
	2533	OldPartitionCount db ?
[112]	2534	ALIGN 16
[30]	2535
	2536
[138]	2537	; -----------------------------------------------------------------------------
	2538	; ARRAY OF DISK INFORMATION STRUCTURES
	2539	; -----------------------------------------------------------------------------
[128]	2540	; Array of DISKINFO structures
	2541	DiskInformation db MaxDisks dup(DISKINFO_Size dup(?))
	2542	ALIGN 16
[51]	2543
[138]	2544
[51]	2545	; -----------------------------------------------------------------------------
[105]	2546	; INT13X DAP
[51]	2547	; -----------------------------------------------------------------------------
[105]	2548	; Disk Address Package that holds information for LBA-access using INT13X
	2549	INT13X_DAP db ? ; Size of paket, inserted by code
	2550	db ? ; Reserved
	2551	INT13X_DAP_NumBlocks dw ? ; Number of blocks
	2552	INT13X_DAP_Transfer dd ? ; Transfer Adress
	2553	INT13X_DAP_Absolute dd ? ; Absolute Sector
	2554	dd ? ; Second Part of QWORD
	2555	INT13X_DAP_Size = $-offset [INT13X_DAP] ; Calculated size
[112]	2556	ALIGN 16
[105]	2557
[30]	2558
[138]	2559	; -----------------------------------------------------------------------------
	2560	; DEBUG
	2561	; -----------------------------------------------------------------------------
	2562	; Some debug area.
	2563	dbg_scratch db 512 dup(?)
	2564	ALIGN 16
[30]	2565
[46]	2566
[51]	2567	; End of transient variables.
	2568	EndOfVariables:
[112]	2569	EndOfVariablesAbs = offset EndOfVariables + image_size
[51]	2570
	2571
	2572
	2573	; -----------------------------------------------------------------------------
	2574	; OLD AND NEW STACKS
	2575	; -----------------------------------------------------------------------------
[52]	2576	; BOOKMARK: Storage for Old and New Stack Pointers
[51]	2577	;
	2578	; These need to be outside the variable section because AiR-BOOT can restart
	2579	; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
	2580	; they would be cleared on AiR-BOOT restart.
	2581	;
	2582
	2583	; The variable section is cleared word-wise, so it could clear one byte extra
	2584	; depending on the alignment and size. This DD prevents the OldSP and OldSS
	2585	; to be partly overwritten by the clearing routine.
	2586	dd ?
[112]	2587	ALIGN 16
[51]	2588
	2589	; SS:SP from before our relocation.
	2590	; The registers values when the BIOS transferred control to us were pushed
	2591	; on this stack.
	2592
	2593	OldSP dw ?
	2594	OldSS dw ?
	2595
	2596	; SS:SP currently in use.
	2597	; They are temporarily dumped here so we can pop the resgisters from
	2598	; the old stack to display them in debug mode.
	2599	CurrentSP dw ?
	2600	CurrentSS dw ?
[112]	2601	ALIGN 16
[132]	2602
	2603	; Usually, commits are buildable and some minor checking has been done that
	2604	; whole disks do not get wiped. However, there are situations where stuff is
	2605	; in such a flux that it would be better to do non-buildable commits.
	2606	; That makes it possible to record the changes piecemeal without the danger of
	2607	; accidently using the resulting loader. Of course everyone is clever enough
	2608	; to _never_ build commits marked as 'testing' and install the result in
	2609	; environments where wiping all attached disks and sticks would be a problem...
[172]	2610	;~ force_build_error dd 0f000h dup(?)
[132]	2611
[51]	2612	;
	2613	; End of BSS segment.
	2614	;
[30]	2615	eobss:
[112]	2616	eobss_abs = offset eobss + image_size
[51]	2617	;
[97]	2618	; Total RAM occupied, including BSS.
	2619	; BASE is 8000:0000, LIMIT is 8000:FFFF.
	2620	; Note that the LDRIMAGE is of constant size, 7C00h = 62 sectors of 512 bytes.
	2621	;
[112]	2622	resident_size = offset eobss + image_size
[97]	2623
	2624	;
[51]	2625	; Close BSS segment.
	2626	;
[37]	2627	IFDEF SEGMENTED
[46]	2628	VOLATILE ENDS
[37]	2629	ELSE
[46]	2630	LDRIMAGE ENDS
[37]	2631	ENDIF
[43]	2632
[52]	2633	; BOOKMARK: End of Module
[45]	2634	END AiR_BOOT
[30]	2635

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source: trunk/bootcode/airboot.asm@ 188

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