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airboot.asm@ 235

Last change on this file since 235 was 234, checked in by Ben Rietbroek, 7 years ago

Updated the charset loading logic [v1.1.5-testing]

This can now inject custom glyphs at any code-point and optionally
remap the original character somewhere else.

For Spanish, two custom CP850 glyphs, 0xb5 and 0xe0, are used.
And the original glyph at code-point 0xb5, which is a box-character that
AiR-BOOT uses, is remapped to code-point 0xd9.

Translator-build 'AiR-BOOT-v1.1.5-ES-TESTBUILD-20180705' was created
from this commit.

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-v1.1.4-manual.pdf

File size: 101.0 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	;
[45]	117
[221]	118	;~ IF BLD_LANG_TXT EQ 'en'
	119	;~ IFNDEF AUX_DEBUG
	120	;~ FX_ENABLED EQU
	121	;~ ENDIF
	122	;~ ELSE
	123	;~ echo
	124	;~ echo *** NOTE: Excluding FX-module for this language ! ***
	125	;~ echo
	126	;~ ENDIF
[45]	127
[221]	128	echo
	129	echo * NOTE: As of v1.1.4-RELEASE the FX-module is excluded to save space *
	130	echo
	131
[51]	132	; -----------------------------------------------------------------------------
	133	; AUX
	134	; -----------------------------------------------------------------------------
[45]	135	;
[31]	136	; bits 7-5 = datarate
	137	; (000=110,001=150,010=300,011=600,100=1200,101=2400,110=4800,111=9600 bps)
	138	; bits 4-3 = parity
	139	; (00 or 10 = none, 01 = odd, 11 = even)
	140	; bit 2 = stop-bits
	141	; (set = 2 stop-bits, clear = 1 stop-bit)
	142	; bits 1-0 = data-bits
	143	; (00 = 5, 01 = 6, 10 = 7, 11 = 8)
	144	;
[30]	145
[31]	146	; 9600 bps, no parity, 1 stop-bit, 8 bits per char
[43]	147	AUX_INIT_PARMS EQU 11100011b
[31]	148
[43]	149	; Com-port for debugging, 0 is disabled
	150	BIOS_COM_PORT EQU 1
	151
[31]	152	; Default word value for BIOS_AuxParms variable
	153	; Note that is has moved since v1.07
[43]	154	BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
[31]	155
[78]	156	; Default byte value for BIOS_BootDisk variable
[77]	157	BIOS_BOOTDISK_DEFAULT EQU 80h
[43]	158
	159
	160
[51]	161	; -----------------------------------------------------------------------------
	162	; LABELS
	163	; -----------------------------------------------------------------------------
	164	; Address labels after code-move
[76]	165	BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
	166	BootBasePtr equ 0h ; We put our MBR to this location
[51]	167	BootBaseExec equ BootBasePtr+offset MBR_RealStart
[76]	168	StackSeg equ 07000h ; Put the stack below the code
	169	StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
	170	StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
[7]	171
	172
[30]	173
[51]	174	; -----------------------------------------------------------------------------
	175	; VIDEO
	176	; -----------------------------------------------------------------------------
[30]	177	; Video pages, no INT 10h is used for menu-drawing etc.
[7]	178	VideoIO_Page0 equ 0B800h
	179	VideoIO_Page1 equ 0B900h
	180	VideoIO_Page2 equ 0BA00h
	181	VideoIO_Page4 equ 0BC00h
	182	VideoIO_FXSegment equ 0A000h
	183
[30]	184	; Special line-drawing characters
[69]	185	TextChar_WinLineRight equ 0C4h
	186	TextChar_WinLineDown equ 0B3h
	187	TextChar_WinRep1 equ 0D1h
	188	TextChar_WinRep2 equ 0C5h
	189	TextChar_WinRep3 equ 0CFh
[234]	190
	191	; Remap the box-char for Spanish
	192	IF BLD_LANG_TXT EQ 'es'
	193	TextChar_WinRep4 equ 0D9h ; Remapped box-char for ES
	194	ELSE
	195	TextChar_WinRep4 equ 0B5h ; Normal box-char
	196	ENDIF
	197
[69]	198	TextChar_WinRep5 equ 0C6h
	199	TextChar_WinRep6 equ 0D8h
[7]	200
[51]	201
[128]	202	; -----------------------------------------------------------------------------
	203	; DISK INFORMATION
	204	; -----------------------------------------------------------------------------
	205	; Offsets into the DISKINFO structures located in the array [DiskInformation]
[51]	206
[128]	207	; BIOS disk number and MBR flags
	208	LocDISKINFO_DiskNum equ 00h ; BYTE - BIOS disk number (80h etc)
	209	LocDISKINFO_MbrFlags equ 01h ; BYTE - Valid MBR, etc
	210
	211	; BIOS INT13 Info
	212	LocDISKINFO_I13_Secs equ 02h ; WORD - Max 63
	213	LocDISKINFO_I13_Heads equ 04h ; WORD - Max 16 or 255
	214	LocDISKINFO_I13_Cyls equ 06h ; WORD - Max 1024
	215
	216	; BIOS INT13X Info
	217	LocDISKINFO_I13X_Flags equ 08h ; WORD - CHS valid, etc
	218	LocDISKINFO_I13X_SecSize equ 0ah ; WORD - Normally 512 bytes
	219	LocDISKINFO_I13X_Secs equ 0ch ; DWORD - Max 63 ?
	220	LocDISKINFO_I13X_Heads equ 10h ; DWORD - Max 255 ?
	221	LocDISKINFO_I13X_Cyls equ 14h ; DWORD - Max 2_32 (4294967296)
	222	LocDISKINFO_I13X_SecsLBA equ 18h ; QWORD - Max 2^64 (4294967296^2)
	223	LocDISKINFO_I13X_HostBus equ 20h ; 4 bytes
	224	LocDISKINFO_I13X_Interface equ 24h ; 8 bytes
	225
	226	; OS/2 LVM Info
	227	LocDISKINFO_LVM_Flags equ 2ch ; WORD - OS/2 ext geo, etc
	228	LocDISKINFO_LVM_MasterLBA equ 2eh ; DWORD - Max 254
	229	LocDISKINFO_LVM_Secs equ 32h ; DWORD - Max 255
	230	LocDISKINFO_LVM_Heads equ 36h ; DWORD - Max 255
	231	LocDISKINFO_LVM_Cyls equ 3ah ; DWORD - Max 65536
	232
	233	; Custom Info
	234	LocDISKINFO_Flags equ 3eh ; WORD - Custom flags, dunno yet
	235
	236	; Size of this structure
	237	DISKINFO_Size equ 40h ; Size to be allocated
	238
	239
[51]	240	; -----------------------------------------------------------------------------
	241	; PARTITION TABLE
	242	; -----------------------------------------------------------------------------
	243	; Offsets for Partition-Entries in MBR/EBRs
[37]	244	LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
	245	LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
[51]	246	LocBRPT_BeginCHS equ 1 ; Packed CHS value
	247	LocBRPT_BeginHead equ 1 ; Start head, usually < 16
	248	LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
	249	LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
[37]	250	LocBRPT_SystemID equ 4 ; Type of system using the partition
[51]	251	LocBRPT_EndCHS equ 5 ; Packed CHS value
	252	LocBRPT_EndHead equ 5 ; End head, usually < 16
	253	LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
	254	LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
	255	LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
	256	LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
[7]	257
[51]	258	; Signature relative to start of MBR/EBR
	259	LocBR_Magic equ 510 ; Offset of 0AA55h signature
[7]	260
[128]	261
[51]	262	; -----------------------------------------------------------------------------
	263	; LVM RECORD
	264	; -----------------------------------------------------------------------------
[34]	265	; Used as a quick compare in LVM.ASM
[37]	266	LocLVM_SignatureByte0 equ 02h
[30]	267
[34]	268	; Offsets for LVM Information Sector.
	269	; These are relative to the start of the LVM sector.
[37]	270	LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
	271	LocLVM_CRC equ 08h ; CRC is a DWORD
	272	LocLVM_Heads equ 1ch ; Number of heads
	273	LocLVM_Secs equ 20h ; Sectors per Track
	274	LocLVM_DiskName equ 24h ; Name of the disk
	275	LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
	276	LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
[30]	277
[34]	278	; An LVM info-sector can contain information on max. 4 partitions.
	279	; All 4 entries will be used when there 4 primary partitions defined.
	280	; For logical partitions, the LVM info-sector is located below the start
	281	; of the logical partition and only one LVM entry is used in that logical
	282	; LVM info-sector.
[37]	283	LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
[30]	284
[51]	285
	286	; -----------------------------------------------------------------------------
	287	; LVM ENTRY
	288	; -----------------------------------------------------------------------------
[34]	289	; Offsets for LVM entry.
	290	; These are relative to the start of the entry.
[51]	291	LocLVM_VolumeID equ 00h ; DWORD
	292	LocLVM_PartitionID equ 04h ; DWORD
	293	LocLVM_PartitionSize equ 08h ; DWORD
	294	LocLVM_PartitionStart equ 0ch ; DWORD
[37]	295	LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
	296	LocLVM_Startable equ 11h ; is Startable (newly installed system)
[51]	297	LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
	298	LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
	299	LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
[37]	300
[71]	301	; Truncated to 11 chars when displayed in menu.
[34]	302	; MiniLVM sets both to the same value.
	303	; Also, MiniLVM uses a 0-byte terminator, so the maximum length is 19d.
	304	; Same goes for LocLVM_DiskName.
[45]	305	; These offsets are relative to an LVM entry.
[37]	306	LocLVM_VolumeName equ 14h ; 20 bytes
	307	LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
[30]	308
[45]	309	; LVM constants.
[51]	310	LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
	311	LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
	312	LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
	313	LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
[30]	314
[34]	315
[51]	316	; -----------------------------------------------------------------------------
	317	; AiR-BOOT IPT
	318	; -----------------------------------------------------------------------------
[7]	319	; Offsets for IPT (Internal Partition Table)
[51]	320	LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
[37]	321	LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
	322	LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
	323	LocIPT_Serial equ 0 ; Serial from MBR ?
	324	LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
	325	LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
	326	LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
[51]	327	LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
[37]	328	LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
	329	LocIPT_LocationBegin equ 20 ; Begin of Partition
	330	LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
	331	LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
	332	LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
[7]	333
[38]	334
[30]	335	; AiR-BOOT IPT-Flags
[37]	336	LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
[51]	337	LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
[7]	338
[37]	339	Flags_Bootable equ 00000001b
	340	Flags_VIBR_Detection equ 00000010b
	341	Flags_HideFeature equ 00000100b
	342	Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
[46]	343	Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
[37]	344	Flags_NoPartName equ 01000000b
	345	Flags_NowFound equ 10000000b ; temp only in OldPartTable
	346	Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
[7]	347
[37]	348	FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
	349	FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
	350	FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
	351	FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
[7]	352
[51]	353
	354	; -----------------------------------------------------------------------------
	355	; AiR-BOOT HPT
	356	; -----------------------------------------------------------------------------
	357	; Hidden Partition Table
	358	; Length of an HPT-entry ((45 * 6 bits-per-part) / 8) * 45
	359	; 33.75 = 34 bytes for HPT-entry, coincidently same as length of IPT-entry.
	360	; Packed table !
	361	LocHPT_LenOfHPT equ 34
	362
	363
	364	; -----------------------------------------------------------------------------
	365	; NAVIGATION KEYS
	366	; -----------------------------------------------------------------------------
[30]	367	; Navigation keys
[37]	368	Keys_Up equ 48h
	369	Keys_Down equ 50h
	370	Keys_Left equ 4Bh
	371	Keys_Right equ 4Dh
	372	Keys_PageUp equ 49h
	373	Keys_PageDown equ 51h
	374	Keys_GrayPlus equ 4Eh
	375	Keys_GrayMinus equ 4Ah
	376	Keys_Plus equ 1Bh
	377	Keys_Minus equ 35h
	378	Keys_ENTER equ 1Ch
	379	Keys_ESC equ 1h
	380	Keys_F1 equ 3Bh
	381	Keys_F10 equ 44h
[51]	382	Keys_C equ 2Eh ; Add. Check for Ctrl!
[37]	383	Keys_Y equ 2Ch
	384	Keys_Z equ 15h
	385	Keys_N equ 31h
	386	Keys_TAB equ 0Fh
	387	Keys_Delete equ 53h
	388	Keys_Backspace equ 0Eh
	389	Keys_Space equ 20h
[7]	390
[37]	391	Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
[7]	392
	393
[51]	394	; -----------------------------------------------------------------------------
	395	; MISC
	396	; -----------------------------------------------------------------------------
	397	; Initial value for the FreeDriveletterMap
	398	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	399	; Each partition with an assigned drive-letter clears a bit in this map.
	400	; (Not implemented yet)
	401	InitialFreeDriveletterMap equ 00000011111111111111111111111100b
[46]	402
[51]	403	;
	404	; The first harddisk is BIOS coded 80h.
	405	; This makes a total of 128 disks that could be supported using this coding.
	406	; This value is used to store disk-information and this info is allocated
	407	; in the BSS. 64 disks ought to be enough for everybody :-)
	408	;
	409	MaxDisks equ 64
[46]	410
	411
	412
[51]	413
	414
	415
	416	;##############################################################################
[46]	417	; AiR-BOOT / MAIN-CODE
[51]	418	;##############################################################################
[46]	419
[51]	420	;
[43]	421	; Because of the TASM-bug the processor had to be changed to turn JUMPS
	422	; off. Existing movzx instructions were replaced with 286 equivalent code.
	423	; Out of range relative jumps have been recoded.
[51]	424	;
	425	; Since version 1.0.8, JWasm is the preferred assembler and Tasm will be
	426	; dropped. Also, the chances of AiR-BOOT being used on a 286-machine are
	427	; very slim, so a future version will revert back to .386 and also incorporate
	428	; 32-bit code. This will enable some enhanced constructs such as scaled
	429	; indexing, bit-instructions, 32-bit registers and what not.
	430	;
[43]	431	.286
[30]	432
[51]	433	;
	434	; For Tasm, MODEL is needed for the USES directive to work.
	435	; So always use a model when assembling with Tasm otherwise registers on
	436	; function calls that use USES are not saved and restored.
	437	; The model itself, has no real effect because we generate a binary image
	438	; and not a segmented executable.
	439	; For the other assemblers we define no model to get rid of the default C/C++
	440	; segments for future object-linked versions of AiR-BOOT.
	441	;
[43]	442	IFDEF TASM
[46]	443	;~ .model large, basic
[43]	444	.model tiny,c
	445	ENDIF
[37]	446
	447	;
[51]	448	; The below is used to switch between the original 1-segment (code_seg) layout
	449	; and the new 2-segment (code_seg and bss_data) layout.
	450	; It will be removed in future versions.
[37]	451	; The 2-segment layout was needed for JWasm because it does not treat
[51]	452	; db ? at the end of a code segment as bss-data.
[37]	453	; Therefore, a true BSS segment is now used.
[51]	454	; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
[37]	455	; segment.
	456	; Note that this influences the offsets in the BSS in the list-file and
	457	; the wdis disassembly file (.WDA).
	458	; They are now segment-relative. The true offset is resolved at link
	459	; time.
	460	;
[43]	461	SEGMENTED EQU
[37]	462
[51]	463	IFDEF SEGMENTED
	464	AIRBOOT GROUP LDRIMAGE,VOLATILE
	465	ENDIF
[37]	466
[51]	467	; Our code-segment starts here.
	468	LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
[7]	469
[51]	470	IFDEF SEGMENTED
	471	ASSUME CS:AIRBOOT, DS:AIRBOOT, ES:nothing, SS:nothing
	472	ELSE
	473	ASSUME CS:LDRIMAGE,DS:LDRIMAGE,ES:nothing, SS:nothing
	474	ENDIF
[30]	475
[51]	476
	477
[31]	478	;==============================================================================
[51]	479	; Sector 1
	480	;==============================================================================
[30]	481
[51]	482	;------------------------------------------------------------------------------
[46]	483	; We are not a .COM file at 100h but a BINARY image
	484	; of which only the 1st sector gets loaded at 0000:07c00h
	485	; by the BIOS. The code in this 1st sector is position
	486	; independent and moves itself to a new location at 8000:0000h.
	487	; Then it jumps to a new entry-point and loads the rest of
	488	; the image to the new location.
[51]	489	org 00000h
	490	;------------------------------------------------------------------------------
[30]	491
[46]	492
	493	;
[51]	494	; Since AiR-BOOT is a boot-loader residing in track0, the first 512 bytes
	495	; have the layout of a Master Boot Record (MBR). When AiR-BOOT get's installed,
	496	; the first 512 bytes of this code get's merged with the Partition Table.
	497	; The rest is installed in the remaining sectors with sector 62 (LBA 61)
	498	; being the last sector used by AiR-BOOT. Sector 63 is reserved for IBM LVM.
	499	; The last sector used by AiR-BOOT is a copy of the MBR that AiR-BOOT makes
	500	; every time a system gets booted.
[46]	501	;
[30]	502
[46]	503	;
[51]	504	; Due to the addition of an extra 'I13X' sugnature and code to preserve the
	505	; values of the registers on entry, the MBR-code has become a bit messy.
	506	; This will be cleaned-up in future versions.
	507	;
	508
	509	;
[46]	510	; Martin had a short jump followed by the AiRBOOT signature at first.
	511	; Then he encountered strange behaviour by some M$ operating-systems
	512	; if the the first insruction was not a CLI.
[30]	513	; But there was no room to insert the CLI and of course he did not want to
[51]	514	; change the location of the AiR-BOOT signature.
[30]	515	; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
[51]	516	; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
[46]	517	;
[30]	518
	519
[51]	520	; -----------------------------------------------------------------------------
	521	; FIRST ENTRY-POINT
	522	; -----------------------------------------------------------------------------
[52]	523	; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
[51]	524	; ######################################################
	525	; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
	526	; ######################################################
[37]	527	AiR_BOOT:
[51]	528	; Some M$ operating systems need a CLI
	529	; here otherwise they will go beserk
	530	; and will do funny things during
	531	; boot phase, it's laughable!
	532	MBR_1stOpc: cli
[30]	533
[51]	534	; JMP-Short -> MBR_Start
	535	; Uses the 'A' from the signature as the displacement !
	536	MBR_JmpOpc db 0EBh
[7]	537
[51]	538	; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
	539	;~ db 'AiRBOOT',24h,02h,20h,12h,01h,08h,TXT_LanguageID
	540	MBR_ABSig: InsertAirbootSignature TXT_LanguageID
[37]	541
[51]	542	; Total Code Sectors Count.
	543	; Actual value will be inserted by FIXCODE.
	544	MBR_CodeSecs db 1
[37]	545
[51]	546	; Total Code Sectors Count, dynamically calculated.
	547	;~ db (code_end-$)/512
[37]	548
[51]	549	; Check-Sum for Code
	550	MBR_CheckCode dw 0
[37]	551
	552
	553
[51]	554	; -----------------------------------------------------------------------------
	555	; THIRD ENTRY-POINT
	556	; -----------------------------------------------------------------------------
[52]	557	; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
[30]	558	;
	559	; No single instruction below should be changed, added or removed in the code
	560	; below as this will cause the jump-link to go haywire.
[31]	561	;
[37]	562	MBR_Start:
[51]	563	;
	564	; When we arrive here, no registers have been used yet.
	565	; So, they still contain the values the BIOS left in them.
	566	; We want to preserve those value's for later inspection
	567	; by putting them on the stack.
	568	;
[30]	569
[51]	570	; No space for this instruction here.
	571	; We'll enable interrupts later.
	572	;sti ; This opcode is dedicated to:
	573	; =MICROSOFT JUMP DEPARTMENT=
	574
	575	; Push all registers with values provided by the BIOS
	576	; on the stack.
	577	pusha
	578
	579	;
[37]	580	; Setup some base stuff
	581	; AX got loaded wrongly for debug, changed the instructions
	582	; without modifying the number of bytes.
[51]	583	; Don't comment-out the redundant instruction below because it
[37]	584	; will change the number of bytes and break the jump-chain.
[51]	585	;
	586
	587	; The segment we are moving ourself from (NOT USED)
	588	;mov ax, StartBaseSeg
[37]	589	;mov ds, ax
[51]	590
	591	; Make sure DS points to CS.
[37]	592	push cs
	593	pop ds
[51]	594
	595	; Setup the source and destination for the code move.
	596	mov si, StartBasePtr ; The offset we move ourself from
	597	mov ax, BootBaseSeg ; The target segment we move to
[37]	598	mov es, ax
[51]	599	;mov di, BootBasePtr ; The target offset we move to
	600	; Changed the instruction to make room.
	601	; So, BootBasePtr is not used !
	602	; The offset in the target segment is assumed to be 0000
	603	; anyway.
	604	xor di,di
	605	;sti
[30]	606
[76]	607	; Size of the MBR in words.
[37]	608	mov cx, 256 ; Pre-boot environment
[30]	609
[37]	610	;
[51]	611	; This moves this 512-byte sector, loaded by the BIOS at
	612	; 0000:7c00 to 8000:0000.
[37]	613	;
[51]	614	cld
[37]	615	rep movsw
[30]	616
[77]	617	; Temporary save SS and SP so we still have access to this
	618	; stack after we have setup our own.
	619	mov cx,ss
	620	mov bx,sp
	621
[51]	622	; Code an intersegment jump to the new location.
	623	; jmp BootBaseSeg:BootBaseExec
	624	; Note that DX:BX containts the old SS:SP.
[37]	625	db 0EAh
[46]	626	dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
	627	dw BootBaseSeg ; This is 08000h
[7]	628
[30]	629
[51]	630
	631
	632	; -----------------------------------------------------------------------------
	633	; SIMPLE MBR FUNCTIONS
	634	; -----------------------------------------------------------------------------
[30]	635	;
	636	; Some MBR-functions to provide absolute minimum functionality.
	637	;
	638
	639	;
[52]	640	; BOOKMARK: Halt System
[30]	641	; Entry-point for halting the system.
	642	;
[7]	643	MBR_HaltSystem:
[37]	644	mov ax, 8600h
	645	xor cx, cx
	646	mov dx, 500
[46]	647	int 15h ; Wait to display the whole screen :]
	648	MBR_HaltSys:
[81]	649	;~ cli
[37]	650	jmp MBR_HaltSys
[7]	651
[31]	652
[77]	653	; Base of some MBR variables
[45]	654	ORIGIN 0003Ch
	655
[77]	656	MBR_Variables:
	657
[51]	658	; Comport settings.
	659	; It had to be moved to create room for the double I13X signature.
[37]	660	; It cannot be in the config-area (sector 55)
[43]	661	; because that area is crc-protected and would not allow 'poking'.
	662	BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
[31]	663
[77]	664	; When the BIOS turns over control to the MBR, DL holds the BIOS disk-number
	665	; from which the boot was initiated. This would normally be 80h, corresponding
	666	; to the first physical disk. However, some modern BIOSses can directly boot
	667	; from other disks, so AirBoot cannot assume being loaded from 80h anymore.
	668	; So here we store the BIOS disk-number passed in DL when AirBoot got control.
	669	BIOS_BootDisk db BIOS_BOOTDISK_DEFAULT ; Get overwritten with 'DL'
[51]	670
[77]	671	; Reserved space for future variables.
[51]	672	IFDEF AUX_DEBUG
[77]	673	reserved db 5 dup('X')
[51]	674	ELSE
[77]	675	reserved db 5 dup(0)
[51]	676	ENDIF
[30]	677
[45]	678
[51]	679
	680
	681	; -----------------------------------------------------------------------------
	682	; SECOND ENTRY-POINT
	683	; -----------------------------------------------------------------------------
[77]	684
[37]	685	;
	686	; We arrive here after the first jump using the 'A' of the
[51]	687	; AiR-BOOT signature. So we ensure the jump is always at
	688	; this offset. We jump here, because Martin needed to
	689	; insert a CLI on start and did not want to change the
	690	; AiR-BOOT signature because of Microsoft inventions...
[45]	691	;
	692	ORIGIN 00044h
[37]	693
	694	; Jump again...
[51]	695	; This time to the code that relocates to 8000:0000.
[52]	696	; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
[37]	697	jmp MBR_Start
	698
[30]	699	;
	700	; Entry-point when loading fails.
	701	;
[37]	702	db 'LOAD ERROR!', 0
	703	MBR_LoadError Proc Near
	704	mov si, offset $-12
	705	push cs
	706	pop ds
	707	call MBR_Teletype
	708	MBRLE_Halt:
	709	jmp MBRLE_Halt
	710	MBR_LoadError EndP
[7]	711
[30]	712	;
	713	; Entry-point when saving fails.
	714	;
[37]	715	db 'SAVE ERROR!', 0
	716	MBR_SaveError Proc Near
	717	mov si, offset $-12
	718	push cs
	719	pop ds
	720	call MBR_Teletype
	721	MBRSE_Halt:
	722	jmp MBRSE_Halt
	723	MBR_SaveError EndP
[7]	724
[30]	725
	726	; Put text on the screen using the BIOS tele-type function.
	727	; No attributes like color are supported.
[7]	728	; In: SI - Pointer to begin of string (EOS is 0)
	729	; Destroyed: SI
[37]	730	MBR_Teletype Proc Near Uses ax bx cx
	731	mov ah, 0Eh
	732	mov bx, 7
	733	MBRT_Loop:
	734	lodsb
	735	or al, al
	736	jz MBRT_End
	737	int 10h
	738	jmp MBRT_Loop
	739	MBRT_End:
	740	ret
	741	MBR_Teletype EndP
[7]	742
[30]	743	;
	744	; Rousseau: DO NOT ADD CODE TO THIS SECTION !
	745	;
	746
[52]	747	; In: BX - Base Check
	748	; DS:SI - Pointer to 512-byte-area to be included
	749	; Out: BX - Base Check Result
[7]	750	; Destroyed: SI will get updated (+512)
[37]	751	MBR_GetCheckOfSector Proc Near Uses ax cx
	752	mov cx, 256
	753	MBRGCOS_Loop:
	754	lodsw
	755	xor ax, 0BABEh
	756	xor bx, ax
	757	loop MBRGCOS_Loop
	758	or bx, bx
	759	jnz MBRGCOS_NoFixUp
	760	mov bx, 1 ; dont allow 0, cause 0 == empty
	761	MBRGCOS_NoFixUp:
	762	ret
	763	MBR_GetCheckOfSector EndP
[7]	764
[30]	765
	766
	767
	768
	769
[51]	770	; -----------------------------------------------------------------------------
	771	; ENTRY-POINT OF MOVED CODE
	772	; -----------------------------------------------------------------------------
	773
[30]	774	;
[51]	775	; When we arrive here we are running at 8000:0000.
[77]	776	; CX:BX contains the SS:SP of the old stack.
[30]	777	;
	778
[51]	779	;
	780	; This is where the rest of AiR-BOOT gets loaded from track0.
	781	;
[52]	782	; BOOKMARK: Running at relocated position (Load additional sectors)
[31]	783	;------------------------------------------------------------------------------
[7]	784	MBR_RealStart:
[51]	785	;
	786	; Setup new stack and other segment registers.
	787	;
[37]	788	mov ax, StackSeg ; 07000h, below the moved code
	789	mov ss, ax
	790	mov sp, 7FFEh ; Even is better
[51]	791	push es ; ES holds segment where we moved to
[52]	792	pop ds ; Set DS=ES to Code Segment
[30]	793
[51]	794	;
[77]	795	; Push the old SS:SP which was saved in CX:BX on the new stack.
[51]	796	;
[77]	797	push cx ; Old SS
[51]	798	push bx ; Old SP
[43]	799
[77]	800	;
	801	; Store the BIOS disk-number AirBoot was loaded from.
	802	;
	803	mov [BIOS_BootDisk], dl
[51]	804
[37]	805	; Load the configuration-sectors from disk.
[51]	806	; These are the main configuration sector and the various
	807	; tables that follow it upto but not including the MBR backup.
[77]	808	mov bx, offset Configuration ; Location in RAM
	809	mov cx, 0037h ; Config sector is at 55d
	810	mov al, (MBR_BackUpMBR - Configuration) / 200h
	811	mov ah, 02h
	812	; DL is already loaded with BIOS disk-number
	813	int 13h ; Call BIOS service
[37]	814	jnc MBR_ConfigCopy_NoError
[30]	815
[37]	816	; Some error occured
	817	MBR_ConfigCopy_LoadError:
[77]	818	jmp MBR_LoadError ; Will Abort BootUp
[30]	819
[77]	820	; Load the code-sectors from disk.
	821	; [MBR_CodeSecs] is filled in by the FIXCODE helper that post
	822	; processes the AIRBOOT loader image after it has been built.
[37]	823	MBR_ConfigCopy_NoError:
[77]	824	mov bx, offset FurtherMoreLoad ; Directly after MBR
	825	mov cx, 0002h ; Start at 2nd sector
	826	mov al, [MBR_CodeSecs] ; Number of code sectors
	827	mov ah, 02h ; Read sectors
	828	; DL is already loaded with BIOS disk-number
	829	int 13h ; Call BIOS service
[37]	830	jnc MBR_RealStart_NoError
[31]	831
[77]	832	; Some error occured
	833	jmp MBR_LoadError ; Will Abort BootUp
[31]	834
[77]	835
	836	; I13X Signatures
	837	ORIGIN 000d0h
	838
[37]	839	; [v1.05+]
	840	; Signature for IBM's LVM to detect our "powerful" features ;)
[45]	841	;
[37]	842	; [v1.0.8+]
	843	; Reworked MBR code to be able to create a
	844	; double 'I13X' signature.
	845	; MBR's created with LVM eCS v1.x have the signature at 0d5h
	846	; MBR's created with LVM eCS v2.x have the signature at 0d0h
	847	; See eCS bugtracker issue #3002
[45]	848	;
[37]	849	; Update: These are actually MOV EAX,'X31I' instructions
	850	; in the eCS LVM MBR-code. They are at different places in
[51]	851	; the v1.x and v2.x LVM MBR-code. Other code might depend on
	852	; their presence. Let's protect their location.
[37]	853	db 'I13X',0,'I13X',0
[31]	854
[30]	855
[37]	856	MBR_RealStart_NoError:
	857	; Now Check Code with CheckSum
	858	mov si, offset FurtherMoreLoad
[30]	859
[37]	860	;movzx cx, bptr ds:[10h]
	861	mov cl, ds:[10h]
	862	mov ch,0
[31]	863
[51]	864	; Claculate checksum
[37]	865	xor bx, bx
	866	MBR_RealStart_CheckCodeLoop:
	867	call MBR_GetCheckOfSector
	868	loop MBR_RealStart_CheckCodeLoop
[31]	869
[184]	870	; Verify checksum -- EQUAL if OK
[37]	871	cmp MBR_CheckCode, bx
[7]	872
[184]	873	;
	874	; The CRC is calculated and inserted in the loader image when
	875	; AiR-BOOT is installed. Ignoring the CRC enables manually
	876	; merging the loader without using the installer. This is used
	877	; for debugging in virtual machines, where it is easy to
	878	; merge the loader to the disk image of the VM.
	879	;
	880	IFDEF CRC_IGNORE
	881	jmp MBR_RealStart_CheckSuccess ; Ignore CRC
	882	ELSE
	883	je MBR_RealStart_CheckSuccess ; Honor CRC -- EQ is OK
	884	ENDIF
	885
	886	;
[72]	887	; Oops, checksum mismatch -- halt the system
[184]	888	;
[37]	889	mov si, offset TXT_ERROR_Attention
	890	call MBR_Teletype
	891	mov si, offset TXT_ERROR_CheckCode
	892	call MBR_Teletype
	893	mov si, offset TXT_ERROR_CheckFailed
	894	call MBR_Teletype
	895	jmp MBR_HaltSystem
[51]	896
	897
	898	;
	899	; OK, all loading went fine so the rest of the code
	900	; is present now, so we jump to it.
	901	; The old SS:SP is still on the stack.
	902	;
[37]	903	MBR_RealStart_CheckSuccess:
	904	jmp AiR_BOOT_Start
[30]	905
	906
	907
	908
[37]	909
[31]	910	;------------------------------------------------------------------------------
[186]	911	include_from text/%BLD_LANG,mbr.asm ; All translateable Text in MBR
[31]	912	;------------------------------------------------------------------------------
[30]	913
[77]	914	; Disk Signature
	915	ORIGIN 001B8h
[30]	916
	917
[37]	918	; Disk Signature
	919	; Note that in an LVM 2.x MBR this collides
	920	; with the dummy PTE that it uses to look for IBM-BM
	921	; on the second harddisk.
[52]	922	; AiR-BOOT installer will merge the field
	923	; from the MBR it replaces.
[51]	924	MBR_DrvSig db 'DSIG'
[31]	925
[45]	926	; Unused word at 01BCh.
	927	; An LVM 2.x MBR puts 0CC33h here.
[52]	928	; AiR-BOOT installer will merge the field
	929	; from the MBR it replaces.
[51]	930	MBR_Spare dw '$$'
[35]	931
	932
[45]	933	; Partition Table.
	934	ORIGIN 001BEh
[43]	935
[45]	936	; The 4 entries just for show.
[52]	937	; AiR-BOOT installer will merge them from the MBR it replaces.
[51]	938	MBR_PartTable:
[37]	939	db 16 dup('0')
	940	db 16 dup('1')
	941	db 16 dup('2')
	942	db 16 dup('3')
	943
	944	; Boot Sigbature
[51]	945	MBR_Sig dw 0aa55h
[37]	946
[30]	947
	948
	949
[37]	950
[45]	951
[51]	952
[31]	953	;==============================================================================
[51]	954	; Sector 2
	955	;==============================================================================
[30]	956
[51]	957	; -----------------------------------------------------------------------------
	958	; FILE-SYSTEM TABLES
	959	; -----------------------------------------------------------------------------
	960
[77]	961	; First sector the rest of the loader image
[45]	962	ORIGIN 00200h
[30]	963
[31]	964	;
	965	; Everything beyond this point is loaded on startup
	966	; and is NOT existant at first
	967	;
[7]	968	FurtherMoreLoad:
[30]	969
	970	;
	971	; Filesystem table correlating id with name.
	972	;
	973
[37]	974	; first Normal-Partition-ID, Hidden-Partition-ID
[51]	975	; and Default-Partition-Flags.
[37]	976	; 01h -> Boot-Able
	977	; 10h -> FAT32 - Name Getting Scheme
	978	; 20h -> No Name To Get (use Partition Name from IPT)
	979	; 40h -> 'L' flag possible
[7]	980	db 'AiRSYS-TABLE'
[37]	981	FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
[29]	982	db 07h, 17h,41h, 08h,017h,21h, 35h,035h,20h,0FCh,017h,41h
	983	db 09h, 19h,11h, 0Bh,01Bh,11h, 0Ch,01Ch,11h,0EBh,0EBh,01h
[7]	984	db 63h, 63h,21h, 81h,081h,21h, 83h,083h,21h, 40h,040h,21h
	985	db 0A5h,0A5h,21h,0A6h,0A6h,21h, 82h,082h,20h,0A7h,0A7h,21h
	986	db 63h, 63h,21h, 4Dh,04Dh,21h, 4Eh,04Eh,21h, 4Fh,04Fh,21h
	987	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	988	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	989	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	990	db 01h, 01h,01h,0FDh,0FDh,20h, 84h,084h,20h,0A0h,0A0h,20h
	991	db 0Ah, 0Ah,20h,0FEh,0FEh,21h,0FFh,0FFh,21h, 00h,000h,21h
	992	db 16 dup (0)
	993
[46]	994	FileSysNames db 'FAT12 ', 'FAT16 ', 'FAT16Big', 'FAT16Big'
	995	db 'HPFS ', 'NTFS ', 'LVM-Data', 'JFS '
	996	db 'FAT32 ', 'FAT32 ', 'FAT32 ', 'BeOS '
	997	db 'Unix ', 'Minix ', 'Linux ', 'Venix ' ; x row ;)
	998	db 'BSD/386 ', 'OpenBSD ', 'LinuxSwp', 'NeXTSTEP'
	999	db 'GNU HURD', 'QNX ', 'QNX ', 'QNX '
	1000	db ' ', ' ', ' ', ' '
	1001	db ' ', ' ', ' ', ' '
	1002	db ' ', ' ', ' ', ' '
	1003	db ' ', 'Kernel ', ' ', '0V-Award'
	1004	; db 'OS/2 Man', 'via BIOS', 'Floppy ', 'Unknown '
	1005	db 'OS2-BMGR', 'via BIOS', 'Floppy ', 'Unknown '
[7]	1006	; -> 44 Partition-Types
	1007
[30]	1008
	1009
	1010
[37]	1011
	1012
[51]	1013	;==============================================================================
	1014	; Sector 3
	1015	;==============================================================================
[30]	1016
[51]	1017	; -----------------------------------------------------------------------------
	1018	; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
	1019	; -----------------------------------------------------------------------------
[30]	1020
[77]	1021	; The entry-point jumped to from the MBR code
[51]	1022	ORIGIN 00400h
[30]	1023
[43]	1024
[77]	1025	;##############################################################################
	1026	;# AiR_BOOT_Start :: This is where the real work begins #
	1027	;# -------------------------------------------------------------------------- #
	1028	;# At this point, all of AirBoot is loaded, including its configuration. #
	1029	;# First, some setup is done, which includes the initialization of variables #
	1030	;# in the BSS. After that, disks are scanned for partitions and the required #
	1031	;# house keeping is done to incorporate changes from the previous boot. Then #
	1032	;# the partition list is prepared and the menu is presented. #
	1033	;##############################################################################
[52]	1034	; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
[36]	1035	AiR_BOOT_Start:
[30]	1036
[36]	1037
[51]	1038	;
	1039	; Enable interrupts.
	1040	;
	1041	sti
[36]	1042
	1043	;
[51]	1044	; Pop the old SS:SP from the stack and save it in the BSS.
[52]	1045	; Note that this is outside the normal variable area that gets cleared.
	1046	; This allows AiR-BOOT to restart itself when debugging and come-up
	1047	; with access to the original values of registers the BIOS passed.
[51]	1048	;
	1049	pop [OldSP]
	1050	pop [OldSS]
	1051
[141]	1052	; Clear the BSS from its real start just upto the end of the variables.
	1053	; Here 'real start' means from where the BSS begins, which is below
	1054	; the point where the first variables are located. The part after
	1055	; the variables is not cleared because that is where the old SS:SP is
	1056	; stored, which is needed for AirBoot restarts during debugging.
	1057	mov bx, offset sobss
	1058	mov cx, offset EndOfVariables - offset sobss
	1059	xor ax, ax
	1060	call FillMemBlock
[51]	1061
[142]	1062	; Initialize the com-port for debugging
	1063	IFDEF AUX_DEBUG
	1064	PUSHRF
	1065	; Init com-port
	1066	call AuxIO_Init
	1067	; Hello message
	1068	mov si, offset [AuxIOHello]
	1069	call AuxIO_Print
	1070	; Show Build Info
	1071	call AuxIO_PrintBuildInfo
	1072	call AuxIO_TeletypeNL
	1073	POPRF
	1074	ENDIF
	1075
	1076	; Dump debug information
	1077	IFDEF AUX_DEBUG
	1078	IF 1
	1079	call DEBUG_Dump1
	1080	ENDIF
	1081	ENDIF
	1082
[117]	1083	; Verify we still got the BIOS disk in DL
	1084	IFDEF AUX_DEBUG
	1085	IF 1
[123]	1086	DBG_TEXT_OUT_AUX '## AiR_BOOT_Start ##'
	1087	PUSHRF
[117]	1088	call DEBUG_DumpRegisters
[123]	1089	POPRF
[77]	1090	ENDIF
[117]	1091	ENDIF
[77]	1092
[117]	1093
[51]	1094	; -----------------------------------------------------------------------------
	1095	; IBM-BM BOOT PREPARATION
	1096	; -----------------------------------------------------------------------------
	1097	;
[36]	1098	; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
	1099	; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
	1100	; signature is required at 3000:0000, FS needs to contain 3000h
	1101	; and the 32-bit LBA address needs to follow the 'I13X' signature.
	1102	; For booting IBM-BM from the second disk, a copy of the MBR of the
	1103	; first disk is also required at 0000:7E00.
	1104	; This information is derived from the eCS 2.x LVM MBR.
	1105	;
	1106	; So, now is a good time to copy the MBR of the first disk to
	1107	; 0000:7E00 in case the partition that will be started is IBM-BM.
	1108	; This copy is located at 8000:0000 and DS already points to this
[51]	1109	; segment. The 'I13X' signature and FS will be setup later.
[36]	1110	;
[37]	1111	pusha ; Save all the general purpose regs
	1112	push es ; We need ES too, so save its value
	1113	xor ax,ax ; Segment 0000h
	1114	mov es,ax ; Make ES point to it
	1115	mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
	1116	mov di,7e00h ; Destination for the MBR for IBM-BM
	1117	mov cx,100h ; 256 words = 512 bytes
	1118	cld ; Direction from low to high
	1119	rep movsw ; Copy the 256 words of the MBR
	1120	pop es ; Restore previous value of ES
	1121	popa ; Restore all the general purpose regs
[36]	1122
	1123
[51]	1124	; -----------------------------------------------------------------------------
	1125	; PRECRAP
	1126	; -----------------------------------------------------------------------------
[36]	1127
[51]	1128	;
	1129	; First it clears the BSS area.
[52]	1130	; Note that the old SS:SP is stored outside this area so this
[51]	1131	; does not get lost.
	1132	; Then initialize various runtime variables and structures.
	1133	;
[52]	1134	; BOOKMARK: Pre Crap
[51]	1135	call PRECRAP_Main
	1136	; Number of harddisks and other system-info is now known.
[43]	1137
[117]	1138	;!
	1139	;! DEBUG_BLOCK
	1140	;! Let's see what the BIOS supplied us with...
	1141	;! Uncomment below to activate.
	1142	;!
	1143	IFDEF AUX_DEBUG
	1144	IF 0
	1145	pushf
	1146	pusha
[45]	1147
[117]	1148	; Print title.
	1149	mov si,offset [bios_reg]
	1150	call AuxIO_Print
	1151	; Save the current stack (SS:SP).
	1152	mov ax,ss
	1153	mov [CurrentSS],ax
	1154	mov [CurrentSP],sp
[30]	1155
[117]	1156	; Restore the old stack.
	1157	mov ss,[OldSS]
	1158	mov sp,[OldSP]
[30]	1159
[117]	1160	; Pop the registers with the BIOS values.
	1161	popa
	1162	; Push them back for AiR-BOOT restart (debug mode).
	1163	pusha
	1164	; Dump them to the serial-port.
	1165	call DEBUG_DumpRegisters
	1166	; Restore the current stack.
	1167	mov ax,[CurrentSS]
	1168	mov ss,ax
	1169	mov sp,[CurrentSP]
[30]	1170
[117]	1171	popa
	1172	popf
	1173	ENDIF
	1174	ENDIF
[30]	1175
[51]	1176
[117]	1177
[145]	1178	; -----------------------------------------------------------------------------
	1179	; UPDATE MBR
	1180	; -----------------------------------------------------------------------------
[144]	1181
[145]	1182	; Write MBR back to disk to sync MBR variables.
	1183	; Otherwise subsequent MBR loads will differ from the RAM stored one,
	1184	; which is used by MBR protection to validate parts of the MBR.
	1185	xor bx, bx ; 0000h - our load address (8000:0000)
	1186	mov cx, 1 ; CHS sector 1, cylinder 0
	1187	xor dh, dh ; CHS head 0
	1188	mov dl, [BIOS_BootDisk] ; The disk we were loaded from
	1189	mov al, 1 ; One sector to write
	1190	mov ah, 03h ; BIOS write disk (legacy)
	1191	int 13h ; Call BIOS
[175]	1192	sti ; Enable ints
[145]	1193	;!
	1194	;! TODO: Check success
	1195	;! Yes, we should check for errors here, coz it would mean AirBoot
	1196	;! was loaded from a disk where the MBR cannot be written !
	1197	;!
	1198
[164]	1199
	1200
[51]	1201	; -----------------------------------------------------------------------------
[144]	1202	; SCAN DISKS
[51]	1203	; -----------------------------------------------------------------------------
[77]	1204
[164]	1205	;!
	1206	;! DEBUG_BLOCK
	1207	;! Dump the registers at this point.
	1208	;!
	1209	IFDEF AUX_DEBUG
	1210	IF 0
	1211	PUSHRF
	1212	call DEBUG_DumpRegisters
	1213	;~ call DEBUG_DumpDriveLetters
	1214	;~ call DEBUG_DumpVolumeLetters
	1215	;~ call DEBUG_DumpPartitionXref
	1216	POPRF
	1217	ENDIF
	1218	ENDIF
	1219
	1220
[144]	1221	;
	1222	; Scan disks for information like size etc.
	1223	;
	1224	call DriveIO_ScanDisks
[77]	1225
[164]	1226	;!
	1227	;! DEBUG_BLOCK
	1228	;! Dump the registers at this point.
	1229	;!
	1230	IFDEF AUX_DEBUG
	1231	IF 0
	1232	PUSHRF
	1233	call DEBUG_DumpRegisters
	1234	;~ call DEBUG_DumpDriveLetters
	1235	;~ call DEBUG_DumpVolumeLetters
	1236	;~ call DEBUG_DumpPartitionXref
	1237	POPRF
	1238	ENDIF
	1239	ENDIF
[77]	1240
	1241
[144]	1242	; -----------------------------------------------------------------------------
	1243	; SCAN FOR PARTITIONS
	1244	; -----------------------------------------------------------------------------
[77]	1245
[51]	1246	;
[144]	1247	; Scan disks for partitions
[51]	1248	;
	1249	call PARTSCAN_ScanForPartitions
[144]	1250
	1251	;
[51]	1252	; Internal Partition Table is now populated.
[144]	1253	;
[51]	1254
[117]	1255	;!
	1256	;! DEBUG_BLOCK
	1257	;! Dump various tables.
	1258	;!
	1259	IFDEF AUX_DEBUG
	1260	IF 0
[164]	1261	PUSHRF
[117]	1262	;~ call DEBUG_DumpIPT
	1263	;~ call DEBUG_DumpPartitionPointers
	1264	;~ call DEBUG_DumpNewPartTable
	1265	;~ call DEBUG_DumpDriveLetters
	1266	;~ call DEBUG_DumpDriveLetters
	1267	;~ call DEBUG_DumpVolumeLetters
	1268	;~ call DEBUG_DumpPartitionXref
[164]	1269	POPRF
[117]	1270	ENDIF
	1271	ENDIF
[49]	1272
[30]	1273
[51]	1274	; -----------------------------------------------------------------------------
	1275	; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
	1276	; -----------------------------------------------------------------------------
	1277
	1278	;
	1279	; Reconnect forced drive-letters to their corresponding
	1280	; partitions.
	1281	;
[52]	1282	; BOOKMARK: Update Driveletters so they are in-sync again
[51]	1283	call PARTSCAN_UpdateDriveLetters
	1284	; Driveletter <-> Partition correlation is now restored.
	1285
	1286
	1287
[117]	1288	;!
	1289	;! DEBUG_BLOCK
	1290	;! Dump various tables.
	1291	;!
	1292	IFDEF AUX_DEBUG
	1293	IF 0
[164]	1294	PUSHRF
[117]	1295	;~ call DEBUG_DumpIPT
	1296	;~ call DEBUG_DumpPartitionPointers
	1297	;~ call DEBUG_DumpNewPartTable
	1298	;~ call DEBUG_DumpDriveLetters
	1299	;~ call DEBUG_DumpDriveLetters
	1300	;~ call DEBUG_DumpVolumeLetters
	1301	;~ call DEBUG_DumpPartitionXref
[164]	1302	POPRF
[117]	1303	ENDIF
	1304	ENDIF
[51]	1305
	1306
	1307	; -----------------------------------------------------------------------------
	1308	; SHOW WE ARE ALIVE
	1309	; -----------------------------------------------------------------------------
	1310
	1311	;
	1312	; Put some info about AiR-BOOT and the system on the screen.
	1313	;
	1314
[49]	1315	; Display number of physical disks found
[165]	1316	IFNDEF AUX_DEBUG
	1317	mov [TextPosY], 3
	1318	ELSE
	1319	mov [TextPosY], 4
	1320	ENDIF
	1321	mov [TextPosX], 0
	1322	mov si, offset [DisksFound]
	1323	call VideoIO_Print
[37]	1324	mov al, [TotalHarddiscs]
[165]	1325	mov [TextColorFore], 0fh
[37]	1326	call VideoIO_PrintByteDynamicNumber
[165]	1327	mov [TextColorFore], 07h
[30]	1328
[49]	1329	; Display number of partitions found
[165]	1330	inc [TextPosY]
	1331	mov [TextPosX], 0
	1332	mov si, offset [PartitionsFound]
	1333	call VideoIO_Print
[37]	1334	mov al, [CFG_Partitions]
	1335	call VideoIO_PrintByteDynamicNumber
[30]	1336
[165]	1337	; Display Phase 1 Indicator
	1338	inc [TextPosY]
	1339	mov [TextPosX], 0
	1340	mov si, offset [Phase1]
	1341	call VideoIO_Print
	1342	mov si, offset [OS2_InstallVolume]
	1343	mov al, [si]
	1344	test al,al ; See if phase 1 is active
	1345	jnz @F
	1346	mov si, offset [No]
	1347	@@:
	1348	call VideoIO_Print
[30]	1349
[167]	1350	; Display information about the disks found
	1351	call VideoIO_DisplayDiskInfo
[30]	1352
	1353
	1354
[51]	1355	; -----------------------------------------------------------------------------
[164]	1356	; OS/2 PHASE1 CHECK
[51]	1357	; -----------------------------------------------------------------------------
	1358
	1359	;
[67]	1360	; BOOKMARK: Check for OS/2 being installed
	1361	; Here we check if OS/2 is being installed.
[51]	1362	; If so, we forgo the menu and directly boot it.
	1363	;
	1364
	1365	; If the first byte of the name of the Install Volume is not 0
[49]	1366	; then we potentially have a phase1 boot.
[67]	1367	test byte ptr [OS2_InstallVolume],0ffh
[49]	1368	; Nope, so continue normally.
	1369	jz MBR_Main_ContinueBoot
[36]	1370
[49]	1371	; Setup phase1.
	1372	; It is still possible that a name was set for the
	1373	; Install Volume that does not exist.
	1374	; In that case CY will be clear and AL=0FFh.
	1375	call PART_SetupPhase1
	1376	; Oops, Install Volume not found, continue normally.
	1377	jnc MBR_Main_ContinueBoot
[30]	1378
	1379
[51]	1380	;
[49]	1381	; == Install Volume Found ==
[51]	1382	;
[30]	1383
[51]	1384
[117]	1385	;!
	1386	;! DEBUG_BLOCK
	1387	;! Dump various tables.
	1388	;!
	1389	IFDEF AUX_DEBUG
	1390	IF 0
[164]	1391	PUSHRF
[117]	1392	;~ call DEBUG_DumpIPT
	1393	;~ call DEBUG_DumpPartitionPointers
	1394	;~ call DEBUG_DumpPartitionXref
	1395	;~ call DEBUG_DumpNewPartTable
	1396	;~ call DEBUG_DumpDriveLetters
[164]	1397	POPRF
[117]	1398	ENDIF
	1399	ENDIF
[51]	1400
	1401
[67]	1402	; BOOKMARK: Scan for Partitions (Only if OS/2 install going on)
[51]	1403	; Because one or more partitions are possibly added, the
	1404	; PartitionXref table is not 'in sync' and could cause the
	1405	; wrong system to be automatically booted.
	1406	; So we rescan all partitions causing the PartitionXref
	1407	; table to be filled with correct values so the auto-boot
	1408	; from the new partition will work correctly.
[49]	1409	call PARTSCAN_ScanForPartitions
[30]	1410
	1411
[117]	1412	;!
	1413	;! DEBUG_BLOCK
	1414	;! Dump various tables.
	1415	;!
	1416	IFDEF AUX_DEBUG
	1417	IF 0
[164]	1418	PUSHRF
[117]	1419	;~ call DEBUG_DumpIPT
	1420	;~ call DEBUG_DumpPartitionPointers
	1421	;~ call DEBUG_DumpPartitionXref
	1422	;~ call DEBUG_DumpNewPartTable
	1423	;~ call DEBUG_DumpDriveLetters
[164]	1424	POPRF
[117]	1425	ENDIF
	1426	ENDIF
[30]	1427
[51]	1428	; Setup automatic boot to forgo the Menu.
	1429	; PART_SetupPhase1 has filled in the other variables.
	1430	mov byte ptr [CFG_AutomaticBoot],1
[30]	1431
[51]	1432	;
	1433	; At this point the AiR-BOOT configuration has been altered
	1434	; to automatically boot the newly installed system without
	1435	; displaying the menu.
	1436	; Code further down the road will take care of that.
	1437	;
[49]	1438	jmp MBR_Main_ContinueBoot
[30]	1439
	1440
[49]	1441
	1442
[51]	1443	;
	1444	; Wether a new system is being installed or not,
	1445	; booting continues here.
	1446	;
	1447	MBR_Main_ContinueBoot:
[49]	1448
[51]	1449	;
	1450	; Inform user how to switch between post-screen and menu
	1451	; by putting this info on the screen.
	1452	;
[165]	1453	mov [TextPosY], 23
	1454	mov [TextPosX], 0
	1455	mov si, offset [TABMessage]
	1456	call VideoIO_Print
	1457	inc [TextPosY]
	1458	mov [TextPosX], 57
[37]	1459	call MBR_TeletypeSyncPos
[165]	1460	mov si, offset [PREPMessage]
[37]	1461	call MBR_TeletypeBold
[165]	1462	mov al,30
	1463	call TIMER_WaitTicCount
	1464	mov cl, sizeof [PREPMessage]
	1465	mov al, ' '
	1466	call VideoIO_PrintSingleMultiChar
[30]	1467
[165]	1468	mov [TextPosX], 25
	1469	mov si, offset [BootEndMsg2]
	1470	add si, 39
	1471	mov [TextColorFore], 08h
	1472	call VideoIO_Print
[30]	1473
[164]	1474
[51]	1475	;
	1476	; Debug stop.
	1477	;
[30]	1478
[37]	1479	;
	1480	; ####################### WAIT FOR KEY ########################
	1481	;
[30]	1482
[37]	1483	; Wait for key so we can see debug log if ab-menu hangs.
[49]	1484	;~ xor ax, ax
	1485	;~ int 16h
[37]	1486	;call SOUND_Beep
[30]	1487
	1488
[51]	1489	; Copy BIOS POST to Second Page
[37]	1490	mov ax, VideoIO_Page1
[51]	1491	call VideoIO_BackUpTo
[30]	1492
[37]	1493	;call SOUND_Beep
[30]	1494
	1495
[52]	1496	; BOOKMARK: Save Configuration
[37]	1497	; Save configuration so phase1 boot-through is disabled
	1498	; on next boot.
[67]	1499	mov byte ptr [OS2_InstallVolume], 0
[37]	1500	call DriveIO_SaveConfiguration
[31]	1501
	1502
	1503
[37]	1504	;
[51]	1505	; See if setup needs to be entered.
[37]	1506	;
	1507	MBR_Main_ReEnterSetup:
	1508	call SETUP_CheckEnterSETUP
[7]	1509
[51]	1510	;
	1511	; Do some post processing.
	1512	;
[52]	1513	; BOOKMARK: After Crap
[37]	1514	call AFTERCRAP_Main
[30]	1515
[37]	1516	MBR_Main_ReEnterBootMenuPre:
	1517	; SetUp PartitionPointers for BootMenu (filter non-bootable)
	1518	call PART_CalculateMenuPartPointers
[7]	1519
[37]	1520	; ...and count that one...
[46]	1521	cmp byte ptr [PartitionPointerCount], 0
[37]	1522	jne MBR_Main_SomethingBootAble
	1523	mov si, offset TXT_NoBootAble
	1524	call MBR_Teletype
	1525	jmp MBR_HaltSystem
[30]	1526
[37]	1527	MBR_Main_SomethingBootAble:
	1528	; FixUp Values, define Timed Setup booting, etc.
	1529	call PART_FixUpDefaultPartitionValues
[7]	1530
[30]	1531
	1532
[37]	1533	; -------------------------------------------------- BOOT-MENU
	1534	MBR_Main_ReEnterBootMenu:
	1535	call BOOTMENU_ResetMenuVars ; reset has to be done
[46]	1536	test byte ptr [CFG_AutomaticBoot], 1
[37]	1537	jz MBR_Main_NoAutomaticBooting
[49]	1538
	1539
[37]	1540	; ------------------------------------------ AUTOMATIC BOOTING
	1541	; Select automatic partition, disable automatic booting for
	1542	; next time and boot system...
[46]	1543	mov byte ptr [CFG_AutomaticBoot], 0
[37]	1544	call PASSWORD_AskSystemPwd
	1545	mov al, Menu_EntryAutomatic
[30]	1546
[37]	1547	;mov al, 2
[30]	1548
[37]	1549	mov Menu_EntrySelected, al ; zero based
	1550	jmp MBR_Main_NoBootMenu
[7]	1551
[30]	1552
[49]	1553	MBR_Main_NoAutomaticBooting:
	1554
[37]	1555	;call SOUND_Beep
[30]	1556
[46]	1557	test byte ptr [CFG_BootMenuActive], 0FFh
[37]	1558	jnz MBR_Main_GotBootMenu
	1559	; ----------------------------------------------- NO BOOT-MENU
	1560	; Select default partition and boot system...
	1561	call PASSWORD_AskSystemPwd
[30]	1562
[37]	1563	mov al, Menu_EntryDefault
	1564	;mov al,0 ; zero based
	1565	mov Menu_EntrySelected, al
	1566	jmp MBR_Main_NoBootMenu
[7]	1567
[37]	1568	MBR_Main_GotBootMenu:
	1569	; ------------------------------------------ BOOT-MENU VISUALS
[51]	1570
	1571
	1572	IFDEF FX_ENABLED
[37]	1573	call FX_StartScreen
[51]	1574	ENDIF
[30]	1575
[52]	1576	; BOOKMARK: Build Main Menu
[37]	1577	call BOOTMENU_BuildBackground
	1578	call BOOTMENU_BuildMain
[51]	1579
	1580	IFDEF FX_ENABLED
[37]	1581	call FX_EndScreenRight
[51]	1582	ENDIF
	1583
[37]	1584	call PASSWORD_AskSystemPwd
	1585	call BOOTMENU_ResetTimedBoot
[30]	1586
[52]	1587	; BOOKMARK: Display Main Menu
[37]	1588	call BOOTMENU_Execute
[30]	1589
[37]	1590	jc MBR_Main_ReEnterSetup
	1591	call BOOTMENU_SetVarsAfterMenu
[30]	1592
[37]	1593	; ---------------------------------------------------- BOOTING
	1594	MBR_Main_NoBootMenu:
[51]	1595
	1596	IFDEF FX_ENABLED
[37]	1597	call FX_StartScreen
[51]	1598	ENDIF
	1599
[164]	1600	IFDEF AUX_DEBUG
	1601	IF 0
	1602	DBG_TEXT_OUT_AUX 'HALTING'
	1603	PUSHRF
	1604	;~ call DEBUG_DumpRegisters
	1605	;~ call AuxIO_DumpParagraph
	1606	;~ call AuxIO_TeletypeNL
	1607	@@: jmp @B
	1608	POPRF
	1609	ENDIF
	1610	ENDIF
[52]	1611	; BOOKMARK: Display bye-screen and start selected partition
[37]	1612	call BOOTMENU_BuildGoodBye
[51]	1613
	1614	IFDEF FX_ENABLED
[37]	1615	call FX_EndScreenRight
[51]	1616	ENDIF
	1617
[37]	1618	call PASSWORD_AskChangeBootPwd
[7]	1619
[37]	1620	call ANTIVIR_SaveBackUpMBR
[7]	1621
[49]	1622	; Preload the selected menu-entry
[67]	1623	; However, this value will be wrong if OS/2 phase1 is
[49]	1624	; active and the installation partition is newly created.
	1625	; See below for the adjustment.
	1626	mov dl, byte ptr [Menu_EntrySelected]
	1627
[51]	1628
	1629	;
	1630	; Prepare to start the partition.
	1631	;
[49]	1632	jmp MBR_Main_StartPartition
	1633
	1634
	1635
[51]	1636	; -----------------------------------------------------------------------------
	1637	; START PARTITION
	1638	; -----------------------------------------------------------------------------
	1639
[49]	1640	MBR_Main_StartPartition:
	1641
[117]	1642	IFDEF AUX_DEBUG
	1643	IF 0
[164]	1644	PUSHRF
[117]	1645	;~ call DEBUG_DumpIPT
	1646	;~ call DEBUG_DumpPartitionPointers
	1647	;~ call DEBUG_DumpPartitionXref
	1648	;~ call DEBUG_DumpNewPartTable
[164]	1649	POPRF
[117]	1650	ENDIF
	1651	ENDIF
[49]	1652
	1653
[37]	1654	; -------------------------------------------- START PARTITION
[51]	1655	; THIS DOES NOT RETURN !
[37]	1656	call PART_StartPartition
[30]	1657
	1658
[31]	1659
[51]	1660
[30]	1661	;
[51]	1662	; This entry-point restarts AiR-BOOT almost from scratch.
	1663	; It skips the movement of the MBR but otherwise it is a functional restart.
	1664	; The old BIOS SS:SP where the registers on entry are stored is passed along.
[52]	1665	; This entry-point is used for debugging purposes.
[51]	1666	;
[52]	1667	; BOOKMARK: AiR-BOOT Restart (used for debugging)
[51]	1668	AirbootRestart:
[79]	1669	mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
	1670	mov cx, [OldSS] ; Old SS when BIOS transferred control to AB
	1671	xor dh, dh ; Head 0
	1672	mov dl, [BIOS_BootDisk] ; Disk AirBoot was loaded from
[51]	1673	jmp MBR_RealStart
	1674
	1675
	1676	;
	1677	; This entry-point displays a popup that the system is halted
	1678	; and then halts the system.
	1679	; It is entered on severe error conditions.
	1680	;
[52]	1681	; BOOKMARK: Halt System
[51]	1682	HaltSystem:
	1683	call VideoIO_ClearScreen
	1684	mov ax,0ababh
	1685	mov cx, 0C04h
	1686	mov si, offset SystemHalted
	1687	call SETUP_ShowErrorBox
	1688	; Halt the system.
	1689	jmp MBR_HaltSystem
	1690
	1691
	1692
	1693
	1694
	1695
	1696	;
[52]	1697	; The following section includes various assembler modules
	1698	; at the source level. These contain functionality for a
	1699	; multitude of categories like disk-access, video-io, lvm,
	1700	; debugging, etc. Later versions of AiR-BOOT will use such
	1701	; modules at the object-file level so they can be shared
	1702	; more easily.
[51]	1703	;
	1704
	1705
	1706	; -----------------------------------------------------------------------------
	1707	; INCLUDED FILE SECTION
	1708	; -----------------------------------------------------------------------------
	1709
[52]	1710	; BOOKMARK: Include Section
	1711
[51]	1712	;
[30]	1713	; Include other code-modules here.
	1714	;
[51]	1715
[30]	1716	b_std_txt:
[60]	1717	include regular/std_text.asm ; Standard (non-translateable text)
[30]	1718	size_std_txt = $-b_std_txt
	1719
	1720	b_driveio:
[60]	1721	include regular/driveio.asm ; Drive I/O, Config Load/Save
[30]	1722	size_driveio = $-b_driveio
	1723
[43]	1724	b_lvm:
[60]	1725	include special/lvm.asm ; LVM-specific code
[43]	1726	size_lvm = $-b_lvm
	1727
[30]	1728	b_videoio:
[60]	1729	include regular/videoio.asm ; Video I/O
[30]	1730	size_videoio = $-b_videoio
	1731
	1732	b_timer:
[60]	1733	include regular/timer.asm ; Timer
[30]	1734	size_timer = $-b_timer
	1735
	1736	b_partmain:
[60]	1737	include regular/partmain.asm ; Regular Partition Routines
[30]	1738	size_partmain = $-b_partmain
	1739
	1740	b_partscan:
[60]	1741	include regular/partscan.asm ; Partition Scanning
[30]	1742	size_partscan = $-b_partscan
	1743
	1744	b_bootmenu:
[60]	1745	include regular/bootmenu.asm ; Boot-Menu
[30]	1746	size_bootmenu = $-b_bootmenu
	1747
	1748	b_password:
[60]	1749	include regular/password.asm ; Password related
[30]	1750	size_password = $-b_password
	1751
	1752	b_other:
[60]	1753	include regular/other.asm ; Other Routines
[30]	1754	size_other = $-b_other
[7]	1755
[30]	1756	b_main:
[60]	1757	include setup/main.asm ; The whole AiR-BOOT SETUP
[30]	1758	size_main = $-b_main
	1759
	1760	b_math:
[60]	1761	include regular/math.asm ; Math functions (like 32-bit multiply)
[30]	1762	size_math = $-b_math
	1763
	1764	b_txtother:
[186]	1765	include_from text/%BLD_LANG,other.asm ; All translateable Text-Strings
[30]	1766	size_txtother = $-b_txtother
	1767
	1768	b_txtmenus:
[186]	1769	include_from text/%BLD_LANG,menus.asm ; All translateable Menu-text
[30]	1770	size_txtmenus = $-b_txtmenus
	1771
	1772	b_charset:
[60]	1773	include text/charset.asm ; Special Video Charsets (if needed)
[30]	1774	size_charset = $-b_charset
	1775
[36]	1776	b_conv:
[60]	1777	include regular/conv.asm ; Various conversion routines
[36]	1778	size_conv = $-b_conv
[30]	1779
	1780	b_virus:
[60]	1781	include special/virus.asm ; Virus Detection / Anti-Virus
[30]	1782	size_virus = $-b_virus
[51]	1783
[30]	1784	b_billsuxx:
[60]	1785	include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
[30]	1786	size_billsuxx = $-b_billsuxx
	1787
	1788	b_sound:
[60]	1789	include special/sound.asm ; Sound
[30]	1790	size_sound = $-b_sound
	1791
	1792	b_apm:
[60]	1793	include special/apm.asm ; Power Managment Support
[30]	1794	size_apm = $-b_apm
	1795
[51]	1796
	1797
	1798	;
[234]	1799	; Extended Charset support.
[51]	1800	;
[234]	1801	IFDEF TXT_LoadCharset
[51]	1802	b_ccharset:
[234]	1803	include special/charset.asm ; Charset Support (RU and ES)
[51]	1804	size_ccharset = $-b_ccharset
	1805	ENDIF
	1806
	1807	; Various debugging routines, uses AUXIO and CONV
	1808	IFDEF AUX_DEBUG
	1809	b_debug:
[60]	1810	include regular/debug.asm ; Debug module
[51]	1811	size_debug = $-b_debug
	1812	b_auxio:
[60]	1813	include regular/auxio.asm ; Com-port support for debugging
[51]	1814	size_auxio = $-b_auxio
	1815	ENDIF
	1816
	1817	;
	1818	; We only include this if FX_ENABLED is defined.
	1819	; FX is disabled when debugging to have more room for debug-code.
	1820	; The module compiles to 50eh = 1294 bytes, so that is a lot.
	1821	;
	1822	IFDEF FX_ENABLED
[30]	1823	b_fx:
[60]	1824	include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
[30]	1825	size_fx = $-b_fx
[51]	1826	ENDIF
[30]	1827
	1828
[51]	1829	;
	1830	; End of code marker.
	1831	;
[52]	1832	; BOOKMARK: END OF CODE
[51]	1833	db 'BABE'
	1834	db 'FACE'
[30]	1835
[47]	1836
[51]	1837	; -----------------------------------------------------------------------------
	1838	; END OF CODE
	1839	; -----------------------------------------------------------------------------
	1840	code_end:
	1841
	1842
	1843
	1844
	1845
	1846
	1847
	1848
	1849
	1850
	1851	; -----------------------------------------------------------------------------
	1852	; BLDLEVEL INFORMATION
	1853	; -----------------------------------------------------------------------------
	1854
[52]	1855	; BOOKMARK: BLDLEVEL Information
[51]	1856	ORIGIN 068A0h
	1857
	1858	;
	1859	; The space between this offset and code_end is the space
	1860	; available for code.
	1861	;
	1862	zzz_code_space = $ - code_end
	1863
	1864
[46]	1865	bld_level:
[43]	1866	;
[46]	1867	; Here we insert the OS/2 BLDLEVEL Information.
	1868	; It is composed of the AiR-BOOT version-info and other
[51]	1869	; information. It is unique for each release of AiR-BOOT.
[46]	1870	;
[51]	1871
	1872	;
[47]	1873	; ?? When AUX_DEBUG is enabled and the above org is active,
	1874	; the BLDLEVEL gets corrupted eventhough it gets inserted here
	1875	; explicitly. The effect is almost like an 'OR' or a merge
	1876	; with the already generated FX code.
	1877	; Tasm and JWasm produce different results.
	1878	; ??
	1879	;
[46]	1880	InsertBuildLevel
	1881
[47]	1882
[30]	1883
[7]	1884
	1885
[51]	1886	;==============================================================================
	1887	; Sector 53
	1888	;==============================================================================
	1889
[45]	1890	;
[51]	1891	; From here on, the layout of the image consists of:
	1892	; - AiR-BOOT Protection Image
	1893	; - AiR-BOOT Configuration
	1894	; - DriveLetters
	1895	; - Install Volume
	1896	; - Floppy/CDROM/BIOS BOOT ENTRIES
	1897	; - Internal Partition Table (IPT)
	1898	; - Hidden Partition Table (HPT)
	1899	; - MBR Backup
[45]	1900	;
[7]	1901
[37]	1902	;
[51]	1903	; After that, the BSS follows with several runtime
	1904	; variables and structures.
	1905	; The BSS is not part of the image on disk of course.
	1906	;
	1907
	1908	; -----------------------------------------------------------------------------
	1909	; PROTECTION IMAGE
	1910	; -----------------------------------------------------------------------------
	1911
	1912	;
[52]	1913	; This is the AiR-BOOT MBR Protection Image.
[46]	1914	; The stuff generated here gets overwritten when the
[51]	1915	; MBR_PROT module, which is assembled separately,
	1916	; gets binary merged.
[37]	1917	; So you won't find the string below in the generated binary.
	1918	;
[52]	1919	; BOOKMARK: AiR-BOOT MBR Protection Image
[51]	1920	ORIGIN 06900h
[46]	1921
	1922
[51]	1923
	1924
[46]	1925	;
[51]	1926	; Hardcoded to 768 bytes (MBR_PROT.ASM)
[46]	1927	; The string below is searched for by the FIXCODE helper and must be
[51]	1928	; page (256 bytes) aligned.
[46]	1929	;
[51]	1930	; It seems to be possible to shrink the protection-image to 768 bytes.
	1931	; That gives us an additional 256 bytes of code-space.
	1932	; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
	1933	; Also the granularity needs to change from 512 bytes to 256 bytes since
	1934	; 6900h is not a 512-byte boundary.
	1935	;
	1936	; 20120908 - Done.
	1937	;
[37]	1938	MBR_Protection db 'AiR-BOOT MBR-Protection Image'
	1939
[43]	1940	; Just fill.
[51]	1941	;~ db 1024-($-MBR_Protection) dup('M')
	1942	db 768-($-MBR_Protection) dup('M')
[37]	1943
	1944
[51]	1945
	1946
	1947
	1948
	1949
[31]	1950	;==============================================================================
[51]	1951	; Sector 55
	1952	;==============================================================================
	1953	; -----------------------------------------------------------------------------
	1954	; AiR-BOOT CONFIGURATION
	1955	; -----------------------------------------------------------------------------
[30]	1956
[37]	1957	;
	1958	; This section contains the AiR-BOOT configuration.
	1959	; Note that it has a version that should be updated
	1960	; when stuff is added.
	1961	; Also add stuff to the end so that offsets of other
	1962	; variables remain vaild.
	1963	;
[52]	1964	; BOOKMARK: AiR-BOOT Configuration Sector
[45]	1965	ORIGIN 06C00h
[30]	1966
[37]	1967	Configuration:
[69]	1968	; This is the signature for the AiR-BOOT Configuration.
	1969	; Note that this configuration section, like the code section,
	1970	; is CRC protected. This means that poking values in these
	1971	; sections on the disk will invalidate AiR-BOOT and cause it
	1972	; to halt. This is a protection method against other software
	1973	; modifying stuff in track 0.
	1974	db 'AiRCFG-TABLE',0adh
[55]	1975	db 01h, 10h, 'U' ; "Compressed" ID String
[37]	1976	; Version 1.02 was for code 1.06, 1.03 was internal
	1977	; and 1.04,1.05 and 1.06 do not exist.
[46]	1978	;
	1979	; 1.07 was used with AB v1.07 and introduced the phase1
	1980	; system-name. For the rest it is compatible with v1.02.
	1981	;
	1982	; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
	1983	; of several components and the packing of the hideparttable.
	1984	; The core configuration has not changed but the generated
	1985	; configuration has. The v1.0.8 installer handles upgrading.
	1986	;
[54]	1987	; It has been decided that uneven minor numbers will be
	1988	; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
[60]	1989	;
[37]	1990	; It is not required for the config to have the
	1991	; same version as the code, so in the future
	1992	; the code version might be higher than the
	1993	; config version if there are no changes to the latter.
[46]	1994	;
[7]	1995
[37]	1996	CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
	1997	CFG_LastTimeEditHi dw 0 ; second 16 bit part...
[7]	1998
[37]	1999	CFG_CheckConfig dw 0 ; Check-Sum for Configuration
[7]	2000
[37]	2001	CFG_Partitions db 0 ; Count of partitions in IPT
[51]	2002	CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
[37]	2003	CFG_PartDefault db 0 ; Default-Partition (Base=0)
[7]	2004
[37]	2005	CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
[202]	2006
	2007	; Do not enable time-out when debugging.
	2008	IFDEF AUX_DEBUG
	2009	CFG_TimedBoot db 0 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
	2010	ELSE
[176]	2011	CFG_TimedBoot db 1 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
[202]	2012	ENDIF
	2013
[37]	2014	CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
	2015	CFG_TimedDelay dw 123 ; Timed Boot - Delay
	2016	CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
	2017	CFG_RememberBoot db 1 ; Remember Manual Boot Choice
	2018	CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
	2019	CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
	2020	CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
[7]	2021	; v0.29+ -> 2 - Detailed Bootmenu
[37]	2022	CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
	2023	CFG_PasswordSetup db 0 ; Ask Password when entering Setup
	2024	CFG_PasswordSystem db 0 ; Ask Password when booting System
	2025	CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
	2026	CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
	2027	CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
	2028	CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
	2029	CFG_DetectVirus db 0 ; Detect Virus ?
	2030	CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
	2031	CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
	2032	CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
	2033	CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
	2034	dw 07A53h
	2035	dw 0E797h
	2036	dw 0A896h
	2037	CFG_BootPassword dw 0101Fh ; Another CR... ;-)
	2038	dw 07A53h
	2039	dw 0E797h
	2040	dw 0A896h
	2041	db 0 ; Rude-Protection - Removed since v0.28b
	2042	CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
	2043	CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
	2044	; 0 - Do Nothing
	2045	; 1 - Reset Time
	2046	; 2 - Stop Time
	2047	CFG_MakeSound db 0 ; Should be clear ;)
	2048	CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
[51]	2049	CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
[37]	2050	; 0 - Disabled
	2051	; 1 - CD-ROM
	2052	; 2 - Network
	2053	; 3 - ZIP/LS120
	2054	CFG_CooperBars db 0 ; If Cooper Bars should be shown
	2055	CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
	2056	CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
	2057	; FFh -> Disabled
	2058	CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
	2059	CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
	2060	CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
	2061	CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
	2062	CFG_PartAutomatic db 0 ; Partition-No for automatic booting
	2063	CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
	2064	CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
[7]	2065
[30]	2066
	2067	;
	2068	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2069	;
	2070
[45]	2071	;
	2072	; Drive Letters.
	2073	;
[52]	2074	; BOOKMARK: Stored Drive Letters
[45]	2075	ORIGIN 06CB0h
[30]	2076
	2077
[51]	2078	; -----------------------------------------------------------------------------
	2079	; DRIVE LETTERS
	2080	; -----------------------------------------------------------------------------
	2081
[45]	2082	;
	2083	; Moved here to make room for packed hiddenparttable.
[71]	2084	; This gets filled with drive-letters that are assigned using the dl-feature.
[45]	2085	;
	2086	DriveLetters db LocIPT_MaxPartitions dup (0)
	2087	; Format is:
	2088	;============
	2089	; Drive-Letter : BYTE (80h-C:, 81h-D:)
	2090	; --------------------> 1 Byte * 45
[30]	2091
[51]	2092
	2093
	2094	; -----------------------------------------------------------------------------
	2095	; INSTALL VOLUME
	2096	; -----------------------------------------------------------------------------
	2097
[45]	2098	;
[37]	2099	; Allways have the name of the installation volume
	2100	; at this offset.
	2101	; So future config changes will not break auto-install.
[45]	2102	;
[67]	2103	; BOOKMARK: Name of OS/2 Installation Volume
[45]	2104	ORIGIN 06D00h
[37]	2105
[67]	2106	; SET(A)BOOT stores the volume name of the OS/2 system being installed here.
[31]	2107	; It is truncated to 11 chars because AiR-BOOT currently does not support
	2108	; longer labelnames. The name is also capitalized.
[67]	2109	OS2_InstallVolume db 0,'NOPHASEONE' ,0
[30]	2110
[37]	2111	;
	2112	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2113	;
	2114
[51]	2115
	2116	; -----------------------------------------------------------------------------
	2117	; FLOPPY/CDROM/BIOS BOOT ENTRIES
	2118	; -----------------------------------------------------------------------------
	2119
[37]	2120	;
	2121	; 06DABh - 06C00h = 01ABh = 427 bytes.
	2122	; Entries allocated down from 06E00 boundary.
	2123	;
[52]	2124	; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
[46]	2125	ORIGIN 06DABh ; 427 Boundry
[37]	2126
	2127	; (432 - 5 = 427)
	2128	AutoDrvLetter db 0
	2129	AutoDrvLetterSerial dd 0
	2130
	2131	; This entry is also 34 bytes long (466 - 34 = 432)
	2132	BIOScontIPTentry:
	2133	db 0, 0, 0, 0, ' '
	2134	db 0, 0FEh, Flags_Bootable
	2135	dw 0 ; No Checksum :)
	2136	db 0, 1, 0
	2137	db 0, 1, 0 ; Location of Partition/Boot Record
	2138	dd 0, 0
	2139
[7]	2140	; VIR variables are for the AiR-BOOT Anti Virus Code
	2141	; Most of them are backups of Interrupt Points, so we can check, if a
	2142	; stealth virus is on-line, we can intercept its call.
	2143	; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
[46]	2144	; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
	2145	; system from working, so the user has to press reset.
	2146	; That's saver than a Reboot.
[7]	2147	;
	2148	; If a virus is found on the partition to boot, the system will ONLY halt,
	2149	; nothing more, because we can not remove it. The user shall do it :)
	2150	; Those viruses are detected via a real nasty method...Checksum-Checking of the
	2151	; boot-record, which is to be executed. If it does not match the one in our
	2152	; internal partition table, we will stop. You may however switch this detection
	2153	; off or just reset it by switching 'VIBR Detection'.
	2154
[37]	2155	; 478 - 12 = 466 ; 466 Sub-Part
	2156	CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
	2157	CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
	2158	CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
[30]	2159
[37]	2160	; 478 Boundry (512-34)
	2161	; This entry is also 34 bytes long
	2162	FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
	2163	db 0, 0FFh, Flags_Bootable
	2164	dw 0 ; No Checksum :)
	2165	db 0, 1, 0
	2166	db 0, 1, 0 ; Location of Partition/Boot Record
	2167	dd 0, 0
[30]	2168
	2169
[51]	2170
	2171	; -----------------------------------------------------------------------------
	2172	; INTERNAL PARTITION TABLE (IPT)
	2173	; -----------------------------------------------------------------------------
	2174
[45]	2175	;
	2176	; AiR-BOOT Internal Partition Table (IPT)
	2177	;
[52]	2178	; BOOKMARK: Internal Partition Table
[45]	2179	ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
[30]	2180
	2181
[45]	2182	;
	2183	; Rousseau: This is the start of the AiR-BOOT IPT
	2184	;
	2185	PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
	2186	; no-partitions detected... :]
[7]	2187	; db 1, 0, 0, 0, 'Harddisc 1'
	2188	; db 0, 0FFh, Flags_BootAble
	2189	; dw 0 ; No Checksum :)
	2190	; db 0, 0, 1
[46]	2191	; db 0, 0, 1 ; Location of Partition/Boot Record
[7]	2192	; dd 0, 0
	2193
[37]	2194	; Format is:
	2195	;============
	2196	; SerialNumber * 4
	2197	; PartitionName * 11
	2198	; Drive * 1
	2199	; SystemID * 1 (means the partition type)
	2200	; Flags * 1
	2201	; Checksum * 2 (for virus checking)
	2202	; LocationBegin * 3 (where the partition begins)
	2203	; LocationPartTab * 3 (where the partition table is)
	2204	; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
	2205	; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
	2206	; --------------------> 34 Bytes (total maximum partition-entries = 30)
[7]	2207
[30]	2208
[37]	2209
	2210	; No need to check overlap here because this string will
	2211	; be overwritten if the maximum partition count is reached.
	2212	; So this is not a critical boundary.
[45]	2213	ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
[37]	2214
	2215	db 'AiRBOOTPAR' ; 1K internal partition table
[30]	2216
	2217
	2218
[51]	2219	; -----------------------------------------------------------------------------
	2220	; HIDDEN PARTITION TABLE (HPT)
	2221	; -----------------------------------------------------------------------------
[30]	2222
[45]	2223	;
	2224	; Hidden Partition Table (6-bit packed as of v1.0.8)
	2225	;
[52]	2226	; BOOKMARK: Hidden Partition Table (packed)
[45]	2227	ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
[30]	2228
[38]	2229	HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
[37]	2230	; Format is:
	2231	;============
	2232	; PartitionPtr : BYTE * 30
[38]	2233	; --------------------> 30 Bytes * 45
[30]	2234
[37]	2235	;
[45]	2236	; Driveletters were here.
	2237	; Moved down to make room for packed hideparttable.
	2238	;
[30]	2239
[37]	2240
[45]	2241	;
	2242	; End of hidden partition table.
	2243	; Check overlap here for security reasons.
	2244	;
	2245	ORIGIN % (image_size - 200h - 5)
[30]	2246
[45]	2247	; 79fa - end of packed hide table
	2248	db 'ABHID' ; 1K internal Hide-partition table
[30]	2249
	2250
	2251
	2252
[51]	2253	;==============================================================================
	2254	; Sector 62
	2255	;==============================================================================
	2256	; -----------------------------------------------------------------------------
	2257	; MBR BACKUP
	2258	; -----------------------------------------------------------------------------
[37]	2259
[45]	2260	;
	2261	; AiR-BOOT MBR Backup.
	2262	;
[52]	2263	; BOOKMARK: MBR Backup
[45]	2264	ORIGIN % (image_size - 200h)
[37]	2265
[31]	2266
[46]	2267	MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
	2268	' - Just to fill this sector with something',0
[37]	2269	AirBootRocks db 'AiR-BOOT Rocks!',0
[7]	2270
[45]	2271	db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
[36]	2272
[45]	2273	; End of Image signature.
	2274	;
	2275	ORIGIN % (image_size - 2)
	2276	dw 0BABEh
[30]	2277
	2278
[45]	2279	;
	2280	; End of Image.
	2281	;
	2282	ORIGIN % (image_size)
[97]	2283	image_end:
[30]	2284
	2285	;
[51]	2286	; Terminate LDRIMAGE segment.
[30]	2287	;
[51]	2288	IFDEF SEGMENTED
[43]	2289	LDRIMAGE ENDS
[51]	2290	ENDIF
[30]	2291
[37]	2292
[51]	2293
	2294
	2295
	2296
	2297
	2298	;##############################################################################
	2299	; BSS SEGMENT
	2300	;##############################################################################
	2301
[52]	2302	; BOOKMARK: BSS Segment
[51]	2303
[30]	2304	;
[51]	2305	; Open BSS segment.
[30]	2306	;
[51]	2307	IFDEF SEGMENTED
[37]	2308	VOLATILE SEGMENT USE16 PUBLIC 'BSS'
	2309	ENDIF
	2310
[46]	2311
	2312
[30]	2313	sobss:
[112]	2314	sobss_abs = offset sobss + image_size
[31]	2315	;------------------------------------------------------------------------------
[46]	2316
	2317
[112]	2318	;
	2319	; This is the actual start of the BSS.
	2320	; In the past however, we have had a code-loop that went out of bounds,
	2321	; overwriting the start of the BSS.
	2322	;
	2323	; Because important runtime data is stored in the BSS, we offset it
	2324	; by 400h bytes. Since the loader-image is always 62 sectors, which
	2325	; makes it 7c00h in size, the runtime data starts at 8000h.
	2326	; This is the 'BeginOfVariables' location.
	2327	;
[37]	2328
[112]	2329
[46]	2330	;
	2331	; If segmented, offsets are relative to the BSS segment.
	2332	; They are resolved at link-time.
	2333	; If not segmented, offsets are relative to the CODE segment.
	2334	;
	2335	IFDEF SEGMENTED
[112]	2336	ORG 00400h ; 7c00h + 400h = 8000h
[46]	2337	ELSE
[112]	2338	ORG 08000h ; 8000h
[46]	2339	ENDIF
	2340
	2341
[51]	2342	; -----------------------------------------------------------------------------
	2343	; START OF BSS DATA
	2344	; -----------------------------------------------------------------------------
[7]	2345	; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
	2346	BeginOfVariables:
[112]	2347	BeginOfVariablesAbs = offset BeginOfVariables + image_size
[51]	2348
	2349
	2350	; -----------------------------------------------------------------------------
	2351	; SECTOR BUFFERS
	2352	; -----------------------------------------------------------------------------
[52]	2353	; BOOKMARK: Sector Buffers
[46]	2354	PartitionSector db 512 dup (?) ; Temporary Sector for Partition
[51]	2355	PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
[46]	2356	LVMSector db 512 dup (?) ; Temporary Sector for LVM
	2357	TmpSector db 512 dup (?) ; Temporary Sector
[82]	2358	Scratch db 512 dup (?) ; Scratch buffer
[112]	2359	ALIGN 16
[30]	2360
[112]	2361
[51]	2362	; -----------------------------------------------------------------------------
	2363	; NEW PARTITION TABLE
	2364	; -----------------------------------------------------------------------------
[7]	2365	; Everything used to build a new IPT and reference it to the old one
[52]	2366	; BOOKMARK: New Partition Table
[46]	2367	NewPartTable db 1536 dup (?) ; New Partition Table
[112]	2368	ALIGN 16
[43]	2369
[51]	2370
	2371	; -----------------------------------------------------------------------------
	2372	; NEW HIDE PARTITION TABLE
	2373	; -----------------------------------------------------------------------------
[52]	2374	; BOOKMARK: New Hide-Partition Table
[51]	2375	NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
[112]	2376	ALIGN 16
[7]	2377
[51]	2378
	2379	; -----------------------------------------------------------------------------
	2380	; NEW DRIVE LETTERS
	2381	; -----------------------------------------------------------------------------
[52]	2382	; BOOKMARK: Logical Drive-Letters
[51]	2383	NewDriveLetters db LocIPT_MaxPartitions dup (?)
[112]	2384	ALIGN 16
[7]	2385
[51]	2386
	2387	; -----------------------------------------------------------------------------
	2388	; PARTITION SIZE TABLE
	2389	; -----------------------------------------------------------------------------
[46]	2390	; Size-Table (6 bytes per partition)
[52]	2391	; BOOKMARK: Partition Size Table
[51]	2392	PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
[112]	2393	ALIGN 16
[46]	2394
[51]	2395
	2396	; -----------------------------------------------------------------------------
	2397	; PARTITION POINTERS
	2398	; -----------------------------------------------------------------------------
[49]	2399	; Maximum is 52 word entries till now
[52]	2400	; BOOKMARK: Partition Pointers
[46]	2401	PartitionPointers dw 52 dup (?)
[112]	2402	ALIGN 16
[46]	2403
	2404	; Count of total Partition Pointers
	2405	PartitionPointerCount db ?
[112]	2406	ALIGN 16
[46]	2407
[112]	2408
[51]	2409	; -----------------------------------------------------------------------------
	2410	; XREF TABLE
	2411	; -----------------------------------------------------------------------------
[46]	2412	; X-Reference Table (holds new partnr, index is old part nr)
[52]	2413	; BOOKMARK: Xref Table
[51]	2414	PartitionXref db LocIPT_MaxPartitions dup (?)
[112]	2415	ALIGN 16
[46]	2416
[112]	2417
[51]	2418	; -----------------------------------------------------------------------------
	2419	; VOLUME LETTERS
	2420	; -----------------------------------------------------------------------------
[46]	2421	; Volume-Letters
	2422	; 0 - no LVM support
	2423	; 1 - LVM support, but no letter
	2424	; 'C'-'Z' - assigned drive letter
[52]	2425	; BOOKMARK: Volume Drive Letters
[51]	2426	PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
[112]	2427	ALIGN 16
[46]	2428
	2429
[51]	2430	; -----------------------------------------------------------------------------
	2431	; MISC VARS AND FLAGS
	2432	; -----------------------------------------------------------------------------
[52]	2433	; BOOKMARK: Misc Vars and Flags
[46]	2434	TotalHarddiscs db ? ; Total harddrives (by POST)
	2435	LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
	2436	NewPartitions db ? ; Freshly found partitions
[37]	2437	; Independent of SaveConfiguration
[46]	2438	TooManyPartitions db ? ; Non-zero if too many partitions found
[7]	2439
[46]	2440	VideoIO_Segment dw ? ; Segment for Video I/O
[7]	2441
[46]	2442	ExtendedAbsPos dd ? ; Extended Partition Absolute Position
	2443	ExtendedAbsPosSet db ? ; If Absolute Position set
[7]	2444
[46]	2445	CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
	2446	CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
	2447	; (filled out by PreCrap)
	2448	CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
[37]	2449	; (for detailed error message)
[112]	2450	ALIGN 16
[7]	2451
	2452
[51]	2453	; -----------------------------------------------------------------------------
	2454	; MENU RELATED VARS
	2455	; -----------------------------------------------------------------------------
[46]	2456	Menu_EntrySelected db ? ; Which partition we boot this time...
	2457	Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
	2458	Menu_AbsoluteX db ? ; Pos where Menu stuff starts
	2459	Menu_TotalParts db ? ; Copy of CFG_BootParts
	2460	Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
	2461	Menu_EntryDefault db ? ; Default Entry in filtered View
	2462	Menu_EntryLast db ? ; LastBooted Entry in filtered View
	2463	Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
[7]	2464	; - All adjusted to menu locations
[112]	2465	ALIGN 16
[7]	2466
[112]	2467
[51]	2468	; -----------------------------------------------------------------------------
	2469	; PARTITION RELATED VARS
	2470	; -----------------------------------------------------------------------------
[46]	2471	PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
	2472	PartSetup_ActivePart db ? ; Active Partition
	2473	PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
	2474	PartSetup_HiddenX db ? ; Pos for Hidden-Setup
	2475	PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
[112]	2476	ALIGN 16
[7]	2477
[112]	2478
[51]	2479	; -----------------------------------------------------------------------------
	2480	; TIMER / SETUP RELATED VARS
	2481	; -----------------------------------------------------------------------------
[46]	2482	TimedBootEnable db ? ; Local Enable/Disable for timed boot
	2483	TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
	2484	TimedSecondLeft db ? ; How many seconds are left till boom ?
	2485	TimedSecondBack db ? ; To get a modification noticed
	2486	TimedBootUsed db ? ; Timed Boot used for bootup ?
	2487	FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
	2488	SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
	2489	SETUP_ExitEvent db ? ; Exit Event to end SETUP
	2490	TempPasswordEntry db 17 dup (?)
	2491	SETUP_OldPwd db 17 dup (?)
	2492	SETUP_NewPwd db 17 dup (?)
	2493	SETUP_VerifyPwd db 17 dup (?)
	2494	StartSoundPlayed db ?
	2495	ChangePartNameSave db ? ; Save label after user-edit ?
	2496	SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
[112]	2497	ALIGN 16
[7]	2498
[51]	2499
	2500	; -----------------------------------------------------------------------------
	2501	; FX RELATED VARS
	2502	; -----------------------------------------------------------------------------
[37]	2503	FX_UseCount dw ?
	2504	FX_OverallTimer dw ?
	2505	FX_WideScrollerTimer dw ?
	2506	FX_WideScrollerCurPos dw ?
	2507	FX_WideScrollerSpeed db ?
	2508	FX_WideScrollerSpeedState db ?
	2509	FX_WideScrollerDirection db ?
	2510	FX_WideScrollerAbsDirection db ?
	2511	FX_WideScrollerBounceSpeed db ?
	2512	FX_CooperBarsTimer dw ?
[112]	2513	ALIGN 16
[7]	2514
[51]	2515	; Dynamically Generated Tables - do not need to get initialized with NUL
	2516	FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
	2517	FX_CooperState db 7 dup (?)
	2518	FX_SinusPos db 7 dup (?)
	2519	FX_CooperPos dw 7 dup (?)
[112]	2520	ALIGN 16
[51]	2521
	2522
	2523	; -----------------------------------------------------------------------------
	2524	; CHARSET BUFFER
	2525	; -----------------------------------------------------------------------------
	2526	CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
[112]	2527	ALIGN 16
[51]	2528
[112]	2529
[51]	2530	; -----------------------------------------------------------------------------
	2531	; LVM CRC TABLE
	2532	; -----------------------------------------------------------------------------
	2533	LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
[112]	2534	ALIGN 16
[51]	2535
[7]	2536
[51]	2537	; -----------------------------------------------------------------------------
[138]	2538	; LVM DRIVE-LETTER MAP
[51]	2539	; -----------------------------------------------------------------------------
[138]	2540	; Get's initialized at startup to: 00000011111111111111111111111100b
	2541	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	2542	; Each partition with an assigned drive-letter clears a bit in this map.
	2543	FreeDriveletterMap dd ?
[112]	2544	ALIGN 16
[30]	2545
[51]	2546
	2547	; -----------------------------------------------------------------------------
[138]	2548	; OS/2 PHASE1 RELATED
[51]	2549	; -----------------------------------------------------------------------------
[138]	2550	Phase1Active db ?
	2551	OldPartitionCount db ?
[112]	2552	ALIGN 16
[30]	2553
	2554
[138]	2555	; -----------------------------------------------------------------------------
	2556	; ARRAY OF DISK INFORMATION STRUCTURES
	2557	; -----------------------------------------------------------------------------
[128]	2558	; Array of DISKINFO structures
	2559	DiskInformation db MaxDisks dup(DISKINFO_Size dup(?))
	2560	ALIGN 16
[51]	2561
[138]	2562
[51]	2563	; -----------------------------------------------------------------------------
[105]	2564	; INT13X DAP
[51]	2565	; -----------------------------------------------------------------------------
[105]	2566	; Disk Address Package that holds information for LBA-access using INT13X
	2567	INT13X_DAP db ? ; Size of paket, inserted by code
	2568	db ? ; Reserved
	2569	INT13X_DAP_NumBlocks dw ? ; Number of blocks
	2570	INT13X_DAP_Transfer dd ? ; Transfer Adress
	2571	INT13X_DAP_Absolute dd ? ; Absolute Sector
	2572	dd ? ; Second Part of QWORD
	2573	INT13X_DAP_Size = $-offset [INT13X_DAP] ; Calculated size
[112]	2574	ALIGN 16
[105]	2575
[30]	2576
[138]	2577	; -----------------------------------------------------------------------------
	2578	; DEBUG
	2579	; -----------------------------------------------------------------------------
	2580	; Some debug area.
	2581	dbg_scratch db 512 dup(?)
	2582	ALIGN 16
[30]	2583
[46]	2584
[51]	2585	; End of transient variables.
	2586	EndOfVariables:
[112]	2587	EndOfVariablesAbs = offset EndOfVariables + image_size
[51]	2588
	2589
	2590
	2591	; -----------------------------------------------------------------------------
	2592	; OLD AND NEW STACKS
	2593	; -----------------------------------------------------------------------------
[52]	2594	; BOOKMARK: Storage for Old and New Stack Pointers
[51]	2595	;
	2596	; These need to be outside the variable section because AiR-BOOT can restart
	2597	; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
	2598	; they would be cleared on AiR-BOOT restart.
	2599	;
	2600
	2601	; The variable section is cleared word-wise, so it could clear one byte extra
	2602	; depending on the alignment and size. This DD prevents the OldSP and OldSS
	2603	; to be partly overwritten by the clearing routine.
	2604	dd ?
[112]	2605	ALIGN 16
[51]	2606
	2607	; SS:SP from before our relocation.
	2608	; The registers values when the BIOS transferred control to us were pushed
	2609	; on this stack.
	2610
	2611	OldSP dw ?
	2612	OldSS dw ?
	2613
	2614	; SS:SP currently in use.
	2615	; They are temporarily dumped here so we can pop the resgisters from
	2616	; the old stack to display them in debug mode.
	2617	CurrentSP dw ?
	2618	CurrentSS dw ?
[112]	2619	ALIGN 16
[132]	2620
	2621	; Usually, commits are buildable and some minor checking has been done that
	2622	; whole disks do not get wiped. However, there are situations where stuff is
	2623	; in such a flux that it would be better to do non-buildable commits.
	2624	; That makes it possible to record the changes piecemeal without the danger of
	2625	; accidently using the resulting loader. Of course everyone is clever enough
	2626	; to _never_ build commits marked as 'testing' and install the result in
	2627	; environments where wiping all attached disks and sticks would be a problem...
[172]	2628	;~ force_build_error dd 0f000h dup(?)
[132]	2629
[51]	2630	;
	2631	; End of BSS segment.
	2632	;
[30]	2633	eobss:
[112]	2634	eobss_abs = offset eobss + image_size
[51]	2635	;
[97]	2636	; Total RAM occupied, including BSS.
	2637	; BASE is 8000:0000, LIMIT is 8000:FFFF.
	2638	; Note that the LDRIMAGE is of constant size, 7C00h = 62 sectors of 512 bytes.
	2639	;
[112]	2640	resident_size = offset eobss + image_size
[97]	2641
	2642	;
[51]	2643	; Close BSS segment.
	2644	;
[37]	2645	IFDEF SEGMENTED
[46]	2646	VOLATILE ENDS
[37]	2647	ELSE
[46]	2648	LDRIMAGE ENDS
[37]	2649	ENDIF
[43]	2650
[52]	2651	; BOOKMARK: End of Module
[45]	2652	END AiR_BOOT
[30]	2653

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