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airboot.asm@ 185

Last change on this file since 185 was 185, checked in by Ben Rietbroek, 8 years ago

Made non-EN language versions build again [v1.1.1-testing]

This was done by excuding the FX-module for non-EN builds.
Because the EN-build for REALEASE-v1.1.2 was already distributed with
ArcaOS v5, that is the only build with FX still included.

When FX is not compiled-in and Cooper Bars is enabled in the SETUP,
the TAB-key used for switching between MENU and PRE-BOOT screens will
not work.

Upcoming releases will completely remove FX related code and SETUP
options.

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

File size: 100.1 KB

Rev	Line
[40]	1	;
[29]	2	; AiR-BOOT (c) Copyright 1998-2008 M. Kiewitz
	3	;
	4	; This file is part of AiR-BOOT
	5	;
	6	; AiR-BOOT is free software: you can redistribute it and/or modify it under
	7	; the terms of the GNU General Public License as published by the Free
	8	; Software Foundation, either version 3 of the License, or (at your option)
	9	; any later version.
	10	;
	11	; AiR-BOOT is distributed in the hope that it will be useful, but WITHOUT ANY
	12	; WARRANTY: without even the implied warranty of MERCHANTABILITY or FITNESS
	13	; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
	14	; details.
	15	;
	16	; You should have received a copy of the GNU General Public License along with
	17	; AiR-BOOT. If not, see <http://www.gnu.org/licenses/>.
	18	;
[7]	19
[36]	20
[51]	21
	22
	23
	24
	25
	26	;##############################################################################
[46]	27	; AiR-BOOT / DEFINITIONS
[51]	28	;##############################################################################
[7]	29
[46]	30	;
	31	; Include AiR-BOOT Version Information.
[51]	32	; This version-info is defined using simpel EQU's so it can serve as a
	33	; single source for other formats. The AiR-BOOT signature and the
	34	; OS/2 BLDLEVEL use this basic version information.
[46]	35	;
[70]	36	include ../include/version.inc
[30]	37
[46]	38	;
	39	; Include OS/2 BLDLEVEL Information.
[51]	40	; It uses the version-information in VERSION.INC to build it's signature.
[46]	41	;
[60]	42	include bldlevel.inc
[46]	43
[51]	44	;
	45	; Include some macro's.
	46	; This file contains the ORIGIN macro that is used to detect overlaps.
	47	;
[60]	48	include ../include/asm.inc
[46]	49
[51]	50
[30]	51	; We actually don't want to use this directive because it generates extra
	52	; NOP instructions that we can do without.
[31]	53	; TASM also has a bug in that when the .ERR2 directive is used when
	54	; the .386 directive is in effect, the JUMPS directive is also active
	55	; and cannot be turned off.
[30]	56	; NOJUMPS seems to have no effect in this situation.
	57	; In this case 4 NOP instructions are generated after forward referencing jump
	58	; instructions, to allow for automatic recoding by TASM.
	59	; This seems to be a TASM bug. (v2,v3,v4, dunno v5)
[43]	60	IFDEF TASM
	61	;~ JUMPS
	62	ENDIF
[30]	63
[51]	64
[30]	65	;
	66	; If defined then each module is prefixed with it's name.
[51]	67	; This is used for debugging purposes but it also increases code space.
[30]	68	; It should be off in release code.
	69	;
[51]	70	;~ MODULE_NAMES EQU
[30]	71
	72
	73
[51]	74	; -----------------------------------------------------------------------------
	75	; DEBUG
	76	; -----------------------------------------------------------------------------
[30]	77
[31]	78	;
[51]	79	; Enable this to include Debug Modules and enable COM-port debugging.
	80	; To have room for the debug-code, the FX-code can only be enabled
	81	; when AUX_DEBUG is not defined.
[45]	82	;
[173]	83	;~ AUX_DEBUG EQU
[45]	84
[185]	85
[51]	86	;
[185]	87	; The FX (video animation) module is about to be completely removed from the
	88	; build to regain code space. This is especially true for non-EN builds,
	89	; which often have longer strings or even load special character sets.
[51]	90	;
[185]	91	; However, because the EN-build for REALEASE-v1.1.2 was already distributed
	92	; with ArcaOS v5, FX will only be excluded for non-EN builds. When FX is not
	93	; compiled-in and Cooper Bars is enabled in the SETUP, the TAB-key used for
	94	; switching between MENU and PRE-BOOT screens will not work.
	95	;
	96	; Upcoming releases will completely remove FX related code and SETUP options.
	97	;
	98	; As can be read in 'special/fx.asm' around line 26, this removal may have
	99	; severe consequences for me, so if no new AiR-BOOT releases appear, then you
	100	; know I have been './'-ted, which most probably will be something completely
	101	; different from being 'slash-dotted' ... ;)
	102	;
	103	IF BLD_LANG EQ 'en'
[51]	104	IFNDEF AUX_DEBUG
	105	FX_ENABLED EQU
	106	ENDIF
[185]	107	ELSE
	108	echo
	109	echo *** NOTE: Excluding FX-module for this language ! ***
	110	echo
	111	ENDIF
[45]	112
	113
[51]	114	; -----------------------------------------------------------------------------
	115	; AUX
	116	; -----------------------------------------------------------------------------
[45]	117	;
[31]	118	; bits 7-5 = datarate
	119	; (000=110,001=150,010=300,011=600,100=1200,101=2400,110=4800,111=9600 bps)
	120	; bits 4-3 = parity
	121	; (00 or 10 = none, 01 = odd, 11 = even)
	122	; bit 2 = stop-bits
	123	; (set = 2 stop-bits, clear = 1 stop-bit)
	124	; bits 1-0 = data-bits
	125	; (00 = 5, 01 = 6, 10 = 7, 11 = 8)
	126	;
[30]	127
[31]	128	; 9600 bps, no parity, 1 stop-bit, 8 bits per char
[43]	129	AUX_INIT_PARMS EQU 11100011b
[31]	130
[43]	131	; Com-port for debugging, 0 is disabled
	132	BIOS_COM_PORT EQU 1
	133
[31]	134	; Default word value for BIOS_AuxParms variable
	135	; Note that is has moved since v1.07
[43]	136	BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
[31]	137
[78]	138	; Default byte value for BIOS_BootDisk variable
[77]	139	BIOS_BOOTDISK_DEFAULT EQU 80h
[43]	140
	141
	142
[51]	143	; -----------------------------------------------------------------------------
	144	; LABELS
	145	; -----------------------------------------------------------------------------
	146	; Address labels after code-move
[76]	147	BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
	148	BootBasePtr equ 0h ; We put our MBR to this location
[51]	149	BootBaseExec equ BootBasePtr+offset MBR_RealStart
[76]	150	StackSeg equ 07000h ; Put the stack below the code
	151	StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
	152	StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
[7]	153
	154
[30]	155
[51]	156	; -----------------------------------------------------------------------------
	157	; VIDEO
	158	; -----------------------------------------------------------------------------
[30]	159	; Video pages, no INT 10h is used for menu-drawing etc.
[7]	160	VideoIO_Page0 equ 0B800h
	161	VideoIO_Page1 equ 0B900h
	162	VideoIO_Page2 equ 0BA00h
	163	VideoIO_Page4 equ 0BC00h
	164	VideoIO_FXSegment equ 0A000h
	165
[30]	166	; Special line-drawing characters
[69]	167	TextChar_WinLineRight equ 0C4h
	168	TextChar_WinLineDown equ 0B3h
	169	TextChar_WinRep1 equ 0D1h
	170	TextChar_WinRep2 equ 0C5h
	171	TextChar_WinRep3 equ 0CFh
	172	TextChar_WinRep4 equ 0B5h
	173	TextChar_WinRep5 equ 0C6h
	174	TextChar_WinRep6 equ 0D8h
[7]	175
[51]	176
[128]	177	; -----------------------------------------------------------------------------
	178	; DISK INFORMATION
	179	; -----------------------------------------------------------------------------
	180	; Offsets into the DISKINFO structures located in the array [DiskInformation]
[51]	181
[128]	182	; BIOS disk number and MBR flags
	183	LocDISKINFO_DiskNum equ 00h ; BYTE - BIOS disk number (80h etc)
	184	LocDISKINFO_MbrFlags equ 01h ; BYTE - Valid MBR, etc
	185
	186	; BIOS INT13 Info
	187	LocDISKINFO_I13_Secs equ 02h ; WORD - Max 63
	188	LocDISKINFO_I13_Heads equ 04h ; WORD - Max 16 or 255
	189	LocDISKINFO_I13_Cyls equ 06h ; WORD - Max 1024
	190
	191	; BIOS INT13X Info
	192	LocDISKINFO_I13X_Flags equ 08h ; WORD - CHS valid, etc
	193	LocDISKINFO_I13X_SecSize equ 0ah ; WORD - Normally 512 bytes
	194	LocDISKINFO_I13X_Secs equ 0ch ; DWORD - Max 63 ?
	195	LocDISKINFO_I13X_Heads equ 10h ; DWORD - Max 255 ?
	196	LocDISKINFO_I13X_Cyls equ 14h ; DWORD - Max 2_32 (4294967296)
	197	LocDISKINFO_I13X_SecsLBA equ 18h ; QWORD - Max 2^64 (4294967296^2)
	198	LocDISKINFO_I13X_HostBus equ 20h ; 4 bytes
	199	LocDISKINFO_I13X_Interface equ 24h ; 8 bytes
	200
	201	; OS/2 LVM Info
	202	LocDISKINFO_LVM_Flags equ 2ch ; WORD - OS/2 ext geo, etc
	203	LocDISKINFO_LVM_MasterLBA equ 2eh ; DWORD - Max 254
	204	LocDISKINFO_LVM_Secs equ 32h ; DWORD - Max 255
	205	LocDISKINFO_LVM_Heads equ 36h ; DWORD - Max 255
	206	LocDISKINFO_LVM_Cyls equ 3ah ; DWORD - Max 65536
	207
	208	; Custom Info
	209	LocDISKINFO_Flags equ 3eh ; WORD - Custom flags, dunno yet
	210
	211	; Size of this structure
	212	DISKINFO_Size equ 40h ; Size to be allocated
	213
	214
[51]	215	; -----------------------------------------------------------------------------
	216	; PARTITION TABLE
	217	; -----------------------------------------------------------------------------
	218	; Offsets for Partition-Entries in MBR/EBRs
[37]	219	LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
	220	LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
[51]	221	LocBRPT_BeginCHS equ 1 ; Packed CHS value
	222	LocBRPT_BeginHead equ 1 ; Start head, usually < 16
	223	LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
	224	LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
[37]	225	LocBRPT_SystemID equ 4 ; Type of system using the partition
[51]	226	LocBRPT_EndCHS equ 5 ; Packed CHS value
	227	LocBRPT_EndHead equ 5 ; End head, usually < 16
	228	LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
	229	LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
	230	LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
	231	LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
[7]	232
[51]	233	; Signature relative to start of MBR/EBR
	234	LocBR_Magic equ 510 ; Offset of 0AA55h signature
[7]	235
[128]	236
[51]	237	; -----------------------------------------------------------------------------
	238	; LVM RECORD
	239	; -----------------------------------------------------------------------------
[34]	240	; Used as a quick compare in LVM.ASM
[37]	241	LocLVM_SignatureByte0 equ 02h
[30]	242
[34]	243	; Offsets for LVM Information Sector.
	244	; These are relative to the start of the LVM sector.
[37]	245	LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
	246	LocLVM_CRC equ 08h ; CRC is a DWORD
	247	LocLVM_Heads equ 1ch ; Number of heads
	248	LocLVM_Secs equ 20h ; Sectors per Track
	249	LocLVM_DiskName equ 24h ; Name of the disk
	250	LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
	251	LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
[30]	252
[34]	253	; An LVM info-sector can contain information on max. 4 partitions.
	254	; All 4 entries will be used when there 4 primary partitions defined.
	255	; For logical partitions, the LVM info-sector is located below the start
	256	; of the logical partition and only one LVM entry is used in that logical
	257	; LVM info-sector.
[37]	258	LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
[30]	259
[51]	260
	261	; -----------------------------------------------------------------------------
	262	; LVM ENTRY
	263	; -----------------------------------------------------------------------------
[34]	264	; Offsets for LVM entry.
	265	; These are relative to the start of the entry.
[51]	266	LocLVM_VolumeID equ 00h ; DWORD
	267	LocLVM_PartitionID equ 04h ; DWORD
	268	LocLVM_PartitionSize equ 08h ; DWORD
	269	LocLVM_PartitionStart equ 0ch ; DWORD
[37]	270	LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
	271	LocLVM_Startable equ 11h ; is Startable (newly installed system)
[51]	272	LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
	273	LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
	274	LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
[37]	275
[71]	276	; Truncated to 11 chars when displayed in menu.
[34]	277	; MiniLVM sets both to the same value.
	278	; Also, MiniLVM uses a 0-byte terminator, so the maximum length is 19d.
	279	; Same goes for LocLVM_DiskName.
[45]	280	; These offsets are relative to an LVM entry.
[37]	281	LocLVM_VolumeName equ 14h ; 20 bytes
	282	LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
[30]	283
[45]	284	; LVM constants.
[51]	285	LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
	286	LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
	287	LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
	288	LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
[30]	289
[34]	290
[51]	291	; -----------------------------------------------------------------------------
	292	; AiR-BOOT IPT
	293	; -----------------------------------------------------------------------------
[7]	294	; Offsets for IPT (Internal Partition Table)
[51]	295	LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
[37]	296	LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
	297	LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
	298	LocIPT_Serial equ 0 ; Serial from MBR ?
	299	LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
	300	LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
	301	LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
[51]	302	LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
[37]	303	LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
	304	LocIPT_LocationBegin equ 20 ; Begin of Partition
	305	LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
	306	LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
	307	LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
[7]	308
[38]	309
[30]	310	; AiR-BOOT IPT-Flags
[37]	311	LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
[51]	312	LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
[7]	313
[37]	314	Flags_Bootable equ 00000001b
	315	Flags_VIBR_Detection equ 00000010b
	316	Flags_HideFeature equ 00000100b
	317	Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
[46]	318	Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
[37]	319	Flags_NoPartName equ 01000000b
	320	Flags_NowFound equ 10000000b ; temp only in OldPartTable
	321	Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
[7]	322
[37]	323	FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
	324	FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
	325	FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
	326	FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
[7]	327
[51]	328
	329	; -----------------------------------------------------------------------------
	330	; AiR-BOOT HPT
	331	; -----------------------------------------------------------------------------
	332	; Hidden Partition Table
	333	; Length of an HPT-entry ((45 * 6 bits-per-part) / 8) * 45
	334	; 33.75 = 34 bytes for HPT-entry, coincidently same as length of IPT-entry.
	335	; Packed table !
	336	LocHPT_LenOfHPT equ 34
	337
	338
	339	; -----------------------------------------------------------------------------
	340	; NAVIGATION KEYS
	341	; -----------------------------------------------------------------------------
[30]	342	; Navigation keys
[37]	343	Keys_Up equ 48h
	344	Keys_Down equ 50h
	345	Keys_Left equ 4Bh
	346	Keys_Right equ 4Dh
	347	Keys_PageUp equ 49h
	348	Keys_PageDown equ 51h
	349	Keys_GrayPlus equ 4Eh
	350	Keys_GrayMinus equ 4Ah
	351	Keys_Plus equ 1Bh
	352	Keys_Minus equ 35h
	353	Keys_ENTER equ 1Ch
	354	Keys_ESC equ 1h
	355	Keys_F1 equ 3Bh
	356	Keys_F10 equ 44h
[51]	357	Keys_C equ 2Eh ; Add. Check for Ctrl!
[37]	358	Keys_Y equ 2Ch
	359	Keys_Z equ 15h
	360	Keys_N equ 31h
	361	Keys_TAB equ 0Fh
	362	Keys_Delete equ 53h
	363	Keys_Backspace equ 0Eh
	364	Keys_Space equ 20h
[7]	365
[37]	366	Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
[7]	367
	368
[51]	369	; -----------------------------------------------------------------------------
	370	; MISC
	371	; -----------------------------------------------------------------------------
	372	; Initial value for the FreeDriveletterMap
	373	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	374	; Each partition with an assigned drive-letter clears a bit in this map.
	375	; (Not implemented yet)
	376	InitialFreeDriveletterMap equ 00000011111111111111111111111100b
[46]	377
[51]	378	;
	379	; The first harddisk is BIOS coded 80h.
	380	; This makes a total of 128 disks that could be supported using this coding.
	381	; This value is used to store disk-information and this info is allocated
	382	; in the BSS. 64 disks ought to be enough for everybody :-)
	383	;
	384	MaxDisks equ 64
[46]	385
	386
	387
[51]	388
	389
	390
	391	;##############################################################################
[46]	392	; AiR-BOOT / MAIN-CODE
[51]	393	;##############################################################################
[46]	394
[51]	395	;
[43]	396	; Because of the TASM-bug the processor had to be changed to turn JUMPS
	397	; off. Existing movzx instructions were replaced with 286 equivalent code.
	398	; Out of range relative jumps have been recoded.
[51]	399	;
	400	; Since version 1.0.8, JWasm is the preferred assembler and Tasm will be
	401	; dropped. Also, the chances of AiR-BOOT being used on a 286-machine are
	402	; very slim, so a future version will revert back to .386 and also incorporate
	403	; 32-bit code. This will enable some enhanced constructs such as scaled
	404	; indexing, bit-instructions, 32-bit registers and what not.
	405	;
[43]	406	.286
[30]	407
[51]	408	;
	409	; For Tasm, MODEL is needed for the USES directive to work.
	410	; So always use a model when assembling with Tasm otherwise registers on
	411	; function calls that use USES are not saved and restored.
	412	; The model itself, has no real effect because we generate a binary image
	413	; and not a segmented executable.
	414	; For the other assemblers we define no model to get rid of the default C/C++
	415	; segments for future object-linked versions of AiR-BOOT.
	416	;
[43]	417	IFDEF TASM
[46]	418	;~ .model large, basic
[43]	419	.model tiny,c
	420	ENDIF
[37]	421
	422	;
[51]	423	; The below is used to switch between the original 1-segment (code_seg) layout
	424	; and the new 2-segment (code_seg and bss_data) layout.
	425	; It will be removed in future versions.
[37]	426	; The 2-segment layout was needed for JWasm because it does not treat
[51]	427	; db ? at the end of a code segment as bss-data.
[37]	428	; Therefore, a true BSS segment is now used.
[51]	429	; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
[37]	430	; segment.
	431	; Note that this influences the offsets in the BSS in the list-file and
	432	; the wdis disassembly file (.WDA).
	433	; They are now segment-relative. The true offset is resolved at link
	434	; time.
	435	;
[43]	436	SEGMENTED EQU
[37]	437
[51]	438	IFDEF SEGMENTED
	439	AIRBOOT GROUP LDRIMAGE,VOLATILE
	440	ENDIF
[37]	441
[51]	442	; Our code-segment starts here.
	443	LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
[7]	444
[51]	445	IFDEF SEGMENTED
	446	ASSUME CS:AIRBOOT, DS:AIRBOOT, ES:nothing, SS:nothing
	447	ELSE
	448	ASSUME CS:LDRIMAGE,DS:LDRIMAGE,ES:nothing, SS:nothing
	449	ENDIF
[30]	450
[51]	451
	452
[31]	453	;==============================================================================
[51]	454	; Sector 1
	455	;==============================================================================
[30]	456
[51]	457	;------------------------------------------------------------------------------
[46]	458	; We are not a .COM file at 100h but a BINARY image
	459	; of which only the 1st sector gets loaded at 0000:07c00h
	460	; by the BIOS. The code in this 1st sector is position
	461	; independent and moves itself to a new location at 8000:0000h.
	462	; Then it jumps to a new entry-point and loads the rest of
	463	; the image to the new location.
[51]	464	org 00000h
	465	;------------------------------------------------------------------------------
[30]	466
[46]	467
	468	;
[51]	469	; Since AiR-BOOT is a boot-loader residing in track0, the first 512 bytes
	470	; have the layout of a Master Boot Record (MBR). When AiR-BOOT get's installed,
	471	; the first 512 bytes of this code get's merged with the Partition Table.
	472	; The rest is installed in the remaining sectors with sector 62 (LBA 61)
	473	; being the last sector used by AiR-BOOT. Sector 63 is reserved for IBM LVM.
	474	; The last sector used by AiR-BOOT is a copy of the MBR that AiR-BOOT makes
	475	; every time a system gets booted.
[46]	476	;
[30]	477
[46]	478	;
[51]	479	; Due to the addition of an extra 'I13X' sugnature and code to preserve the
	480	; values of the registers on entry, the MBR-code has become a bit messy.
	481	; This will be cleaned-up in future versions.
	482	;
	483
	484	;
[46]	485	; Martin had a short jump followed by the AiRBOOT signature at first.
	486	; Then he encountered strange behaviour by some M$ operating-systems
	487	; if the the first insruction was not a CLI.
[30]	488	; But there was no room to insert the CLI and of course he did not want to
[51]	489	; change the location of the AiR-BOOT signature.
[30]	490	; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
[51]	491	; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
[46]	492	;
[30]	493
	494
[51]	495	; -----------------------------------------------------------------------------
	496	; FIRST ENTRY-POINT
	497	; -----------------------------------------------------------------------------
[52]	498	; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
[51]	499	; ######################################################
	500	; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
	501	; ######################################################
[37]	502	AiR_BOOT:
[51]	503	; Some M$ operating systems need a CLI
	504	; here otherwise they will go beserk
	505	; and will do funny things during
	506	; boot phase, it's laughable!
	507	MBR_1stOpc: cli
[30]	508
[51]	509	; JMP-Short -> MBR_Start
	510	; Uses the 'A' from the signature as the displacement !
	511	MBR_JmpOpc db 0EBh
[7]	512
[51]	513	; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
	514	;~ db 'AiRBOOT',24h,02h,20h,12h,01h,08h,TXT_LanguageID
	515	MBR_ABSig: InsertAirbootSignature TXT_LanguageID
[37]	516
[51]	517	; Total Code Sectors Count.
	518	; Actual value will be inserted by FIXCODE.
	519	MBR_CodeSecs db 1
[37]	520
[51]	521	; Total Code Sectors Count, dynamically calculated.
	522	;~ db (code_end-$)/512
[37]	523
[51]	524	; Check-Sum for Code
	525	MBR_CheckCode dw 0
[37]	526
	527
	528
[51]	529	; -----------------------------------------------------------------------------
	530	; THIRD ENTRY-POINT
	531	; -----------------------------------------------------------------------------
[52]	532	; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
[30]	533	;
	534	; No single instruction below should be changed, added or removed in the code
	535	; below as this will cause the jump-link to go haywire.
[31]	536	;
[37]	537	MBR_Start:
[51]	538	;
	539	; When we arrive here, no registers have been used yet.
	540	; So, they still contain the values the BIOS left in them.
	541	; We want to preserve those value's for later inspection
	542	; by putting them on the stack.
	543	;
[30]	544
[51]	545	; No space for this instruction here.
	546	; We'll enable interrupts later.
	547	;sti ; This opcode is dedicated to:
	548	; =MICROSOFT JUMP DEPARTMENT=
	549
	550	; Push all registers with values provided by the BIOS
	551	; on the stack.
	552	pusha
	553
	554	;
[37]	555	; Setup some base stuff
	556	; AX got loaded wrongly for debug, changed the instructions
	557	; without modifying the number of bytes.
[51]	558	; Don't comment-out the redundant instruction below because it
[37]	559	; will change the number of bytes and break the jump-chain.
[51]	560	;
	561
	562	; The segment we are moving ourself from (NOT USED)
	563	;mov ax, StartBaseSeg
[37]	564	;mov ds, ax
[51]	565
	566	; Make sure DS points to CS.
[37]	567	push cs
	568	pop ds
[51]	569
	570	; Setup the source and destination for the code move.
	571	mov si, StartBasePtr ; The offset we move ourself from
	572	mov ax, BootBaseSeg ; The target segment we move to
[37]	573	mov es, ax
[51]	574	;mov di, BootBasePtr ; The target offset we move to
	575	; Changed the instruction to make room.
	576	; So, BootBasePtr is not used !
	577	; The offset in the target segment is assumed to be 0000
	578	; anyway.
	579	xor di,di
	580	;sti
[30]	581
[76]	582	; Size of the MBR in words.
[37]	583	mov cx, 256 ; Pre-boot environment
[30]	584
[37]	585	;
[51]	586	; This moves this 512-byte sector, loaded by the BIOS at
	587	; 0000:7c00 to 8000:0000.
[37]	588	;
[51]	589	cld
[37]	590	rep movsw
[30]	591
[77]	592	; Temporary save SS and SP so we still have access to this
	593	; stack after we have setup our own.
	594	mov cx,ss
	595	mov bx,sp
	596
[51]	597	; Code an intersegment jump to the new location.
	598	; jmp BootBaseSeg:BootBaseExec
	599	; Note that DX:BX containts the old SS:SP.
[37]	600	db 0EAh
[46]	601	dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
	602	dw BootBaseSeg ; This is 08000h
[7]	603
[30]	604
[51]	605
	606
	607	; -----------------------------------------------------------------------------
	608	; SIMPLE MBR FUNCTIONS
	609	; -----------------------------------------------------------------------------
[30]	610	;
	611	; Some MBR-functions to provide absolute minimum functionality.
	612	;
	613
	614	;
[52]	615	; BOOKMARK: Halt System
[30]	616	; Entry-point for halting the system.
	617	;
[7]	618	MBR_HaltSystem:
[37]	619	mov ax, 8600h
	620	xor cx, cx
	621	mov dx, 500
[46]	622	int 15h ; Wait to display the whole screen :]
	623	MBR_HaltSys:
[81]	624	;~ cli
[37]	625	jmp MBR_HaltSys
[7]	626
[31]	627
[77]	628	; Base of some MBR variables
[45]	629	ORIGIN 0003Ch
	630
[77]	631	MBR_Variables:
	632
[51]	633	; Comport settings.
	634	; It had to be moved to create room for the double I13X signature.
[37]	635	; It cannot be in the config-area (sector 55)
[43]	636	; because that area is crc-protected and would not allow 'poking'.
	637	BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
[31]	638
[77]	639	; When the BIOS turns over control to the MBR, DL holds the BIOS disk-number
	640	; from which the boot was initiated. This would normally be 80h, corresponding
	641	; to the first physical disk. However, some modern BIOSses can directly boot
	642	; from other disks, so AirBoot cannot assume being loaded from 80h anymore.
	643	; So here we store the BIOS disk-number passed in DL when AirBoot got control.
	644	BIOS_BootDisk db BIOS_BOOTDISK_DEFAULT ; Get overwritten with 'DL'
[51]	645
[77]	646	; Reserved space for future variables.
[51]	647	IFDEF AUX_DEBUG
[77]	648	reserved db 5 dup('X')
[51]	649	ELSE
[77]	650	reserved db 5 dup(0)
[51]	651	ENDIF
[30]	652
[45]	653
[51]	654
	655
	656	; -----------------------------------------------------------------------------
	657	; SECOND ENTRY-POINT
	658	; -----------------------------------------------------------------------------
[77]	659
[37]	660	;
	661	; We arrive here after the first jump using the 'A' of the
[51]	662	; AiR-BOOT signature. So we ensure the jump is always at
	663	; this offset. We jump here, because Martin needed to
	664	; insert a CLI on start and did not want to change the
	665	; AiR-BOOT signature because of Microsoft inventions...
[45]	666	;
	667	ORIGIN 00044h
[37]	668
	669	; Jump again...
[51]	670	; This time to the code that relocates to 8000:0000.
[52]	671	; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
[37]	672	jmp MBR_Start
	673
[30]	674	;
	675	; Entry-point when loading fails.
	676	;
[37]	677	db 'LOAD ERROR!', 0
	678	MBR_LoadError Proc Near
	679	mov si, offset $-12
	680	push cs
	681	pop ds
	682	call MBR_Teletype
	683	MBRLE_Halt:
	684	jmp MBRLE_Halt
	685	MBR_LoadError EndP
[7]	686
[30]	687	;
	688	; Entry-point when saving fails.
	689	;
[37]	690	db 'SAVE ERROR!', 0
	691	MBR_SaveError Proc Near
	692	mov si, offset $-12
	693	push cs
	694	pop ds
	695	call MBR_Teletype
	696	MBRSE_Halt:
	697	jmp MBRSE_Halt
	698	MBR_SaveError EndP
[7]	699
[30]	700
	701	; Put text on the screen using the BIOS tele-type function.
	702	; No attributes like color are supported.
[7]	703	; In: SI - Pointer to begin of string (EOS is 0)
	704	; Destroyed: SI
[37]	705	MBR_Teletype Proc Near Uses ax bx cx
	706	mov ah, 0Eh
	707	mov bx, 7
	708	MBRT_Loop:
	709	lodsb
	710	or al, al
	711	jz MBRT_End
	712	int 10h
	713	jmp MBRT_Loop
	714	MBRT_End:
	715	ret
	716	MBR_Teletype EndP
[7]	717
[30]	718	;
	719	; Rousseau: DO NOT ADD CODE TO THIS SECTION !
	720	;
	721
[52]	722	; In: BX - Base Check
	723	; DS:SI - Pointer to 512-byte-area to be included
	724	; Out: BX - Base Check Result
[7]	725	; Destroyed: SI will get updated (+512)
[37]	726	MBR_GetCheckOfSector Proc Near Uses ax cx
	727	mov cx, 256
	728	MBRGCOS_Loop:
	729	lodsw
	730	xor ax, 0BABEh
	731	xor bx, ax
	732	loop MBRGCOS_Loop
	733	or bx, bx
	734	jnz MBRGCOS_NoFixUp
	735	mov bx, 1 ; dont allow 0, cause 0 == empty
	736	MBRGCOS_NoFixUp:
	737	ret
	738	MBR_GetCheckOfSector EndP
[7]	739
[30]	740
	741
	742
	743
	744
[51]	745	; -----------------------------------------------------------------------------
	746	; ENTRY-POINT OF MOVED CODE
	747	; -----------------------------------------------------------------------------
	748
[30]	749	;
[51]	750	; When we arrive here we are running at 8000:0000.
[77]	751	; CX:BX contains the SS:SP of the old stack.
[30]	752	;
	753
[51]	754	;
	755	; This is where the rest of AiR-BOOT gets loaded from track0.
	756	;
[52]	757	; BOOKMARK: Running at relocated position (Load additional sectors)
[31]	758	;------------------------------------------------------------------------------
[7]	759	MBR_RealStart:
[51]	760	;
	761	; Setup new stack and other segment registers.
	762	;
[37]	763	mov ax, StackSeg ; 07000h, below the moved code
	764	mov ss, ax
	765	mov sp, 7FFEh ; Even is better
[51]	766	push es ; ES holds segment where we moved to
[52]	767	pop ds ; Set DS=ES to Code Segment
[30]	768
[51]	769	;
[77]	770	; Push the old SS:SP which was saved in CX:BX on the new stack.
[51]	771	;
[77]	772	push cx ; Old SS
[51]	773	push bx ; Old SP
[43]	774
[77]	775	;
	776	; Store the BIOS disk-number AirBoot was loaded from.
	777	;
	778	mov [BIOS_BootDisk], dl
[51]	779
[37]	780	; Load the configuration-sectors from disk.
[51]	781	; These are the main configuration sector and the various
	782	; tables that follow it upto but not including the MBR backup.
[77]	783	mov bx, offset Configuration ; Location in RAM
	784	mov cx, 0037h ; Config sector is at 55d
	785	mov al, (MBR_BackUpMBR - Configuration) / 200h
	786	mov ah, 02h
	787	; DL is already loaded with BIOS disk-number
	788	int 13h ; Call BIOS service
[37]	789	jnc MBR_ConfigCopy_NoError
[30]	790
[37]	791	; Some error occured
	792	MBR_ConfigCopy_LoadError:
[77]	793	jmp MBR_LoadError ; Will Abort BootUp
[30]	794
[77]	795	; Load the code-sectors from disk.
	796	; [MBR_CodeSecs] is filled in by the FIXCODE helper that post
	797	; processes the AIRBOOT loader image after it has been built.
[37]	798	MBR_ConfigCopy_NoError:
[77]	799	mov bx, offset FurtherMoreLoad ; Directly after MBR
	800	mov cx, 0002h ; Start at 2nd sector
	801	mov al, [MBR_CodeSecs] ; Number of code sectors
	802	mov ah, 02h ; Read sectors
	803	; DL is already loaded with BIOS disk-number
	804	int 13h ; Call BIOS service
[37]	805	jnc MBR_RealStart_NoError
[31]	806
[77]	807	; Some error occured
	808	jmp MBR_LoadError ; Will Abort BootUp
[31]	809
[77]	810
	811	; I13X Signatures
	812	ORIGIN 000d0h
	813
[37]	814	; [v1.05+]
	815	; Signature for IBM's LVM to detect our "powerful" features ;)
[45]	816	;
[37]	817	; [v1.0.8+]
	818	; Reworked MBR code to be able to create a
	819	; double 'I13X' signature.
	820	; MBR's created with LVM eCS v1.x have the signature at 0d5h
	821	; MBR's created with LVM eCS v2.x have the signature at 0d0h
	822	; See eCS bugtracker issue #3002
[45]	823	;
[37]	824	; Update: These are actually MOV EAX,'X31I' instructions
	825	; in the eCS LVM MBR-code. They are at different places in
[51]	826	; the v1.x and v2.x LVM MBR-code. Other code might depend on
	827	; their presence. Let's protect their location.
[37]	828	db 'I13X',0,'I13X',0
[31]	829
[30]	830
[37]	831	MBR_RealStart_NoError:
	832	; Now Check Code with CheckSum
	833	mov si, offset FurtherMoreLoad
[30]	834
[37]	835	;movzx cx, bptr ds:[10h]
	836	mov cl, ds:[10h]
	837	mov ch,0
[31]	838
[51]	839	; Claculate checksum
[37]	840	xor bx, bx
	841	MBR_RealStart_CheckCodeLoop:
	842	call MBR_GetCheckOfSector
	843	loop MBR_RealStart_CheckCodeLoop
[31]	844
[184]	845	; Verify checksum -- EQUAL if OK
[37]	846	cmp MBR_CheckCode, bx
[7]	847
[184]	848	;
	849	; The CRC is calculated and inserted in the loader image when
	850	; AiR-BOOT is installed. Ignoring the CRC enables manually
	851	; merging the loader without using the installer. This is used
	852	; for debugging in virtual machines, where it is easy to
	853	; merge the loader to the disk image of the VM.
	854	;
	855	IFDEF CRC_IGNORE
	856	jmp MBR_RealStart_CheckSuccess ; Ignore CRC
	857	ELSE
	858	je MBR_RealStart_CheckSuccess ; Honor CRC -- EQ is OK
	859	ENDIF
	860
	861	;
[72]	862	; Oops, checksum mismatch -- halt the system
[184]	863	;
[37]	864	mov si, offset TXT_ERROR_Attention
	865	call MBR_Teletype
	866	mov si, offset TXT_ERROR_CheckCode
	867	call MBR_Teletype
	868	mov si, offset TXT_ERROR_CheckFailed
	869	call MBR_Teletype
	870	jmp MBR_HaltSystem
[51]	871
	872
	873	;
	874	; OK, all loading went fine so the rest of the code
	875	; is present now, so we jump to it.
	876	; The old SS:SP is still on the stack.
	877	;
[37]	878	MBR_RealStart_CheckSuccess:
	879	jmp AiR_BOOT_Start
[30]	880
	881
	882
	883
[37]	884
[31]	885	;------------------------------------------------------------------------------
[60]	886	include text/txtmbr.asm ; All translateable Text in MBR
[31]	887	;------------------------------------------------------------------------------
[30]	888
[77]	889	; Disk Signature
	890	ORIGIN 001B8h
[30]	891
	892
[37]	893	; Disk Signature
	894	; Note that in an LVM 2.x MBR this collides
	895	; with the dummy PTE that it uses to look for IBM-BM
	896	; on the second harddisk.
[52]	897	; AiR-BOOT installer will merge the field
	898	; from the MBR it replaces.
[51]	899	MBR_DrvSig db 'DSIG'
[31]	900
[45]	901	; Unused word at 01BCh.
	902	; An LVM 2.x MBR puts 0CC33h here.
[52]	903	; AiR-BOOT installer will merge the field
	904	; from the MBR it replaces.
[51]	905	MBR_Spare dw '$$'
[35]	906
	907
[45]	908	; Partition Table.
	909	ORIGIN 001BEh
[43]	910
[45]	911	; The 4 entries just for show.
[52]	912	; AiR-BOOT installer will merge them from the MBR it replaces.
[51]	913	MBR_PartTable:
[37]	914	db 16 dup('0')
	915	db 16 dup('1')
	916	db 16 dup('2')
	917	db 16 dup('3')
	918
	919	; Boot Sigbature
[51]	920	MBR_Sig dw 0aa55h
[37]	921
[30]	922
	923
	924
[37]	925
[45]	926
[51]	927
[31]	928	;==============================================================================
[51]	929	; Sector 2
	930	;==============================================================================
[30]	931
[51]	932	; -----------------------------------------------------------------------------
	933	; FILE-SYSTEM TABLES
	934	; -----------------------------------------------------------------------------
	935
[77]	936	; First sector the rest of the loader image
[45]	937	ORIGIN 00200h
[30]	938
[31]	939	;
	940	; Everything beyond this point is loaded on startup
	941	; and is NOT existant at first
	942	;
[7]	943	FurtherMoreLoad:
[30]	944
	945	;
	946	; Filesystem table correlating id with name.
	947	;
	948
[37]	949	; first Normal-Partition-ID, Hidden-Partition-ID
[51]	950	; and Default-Partition-Flags.
[37]	951	; 01h -> Boot-Able
	952	; 10h -> FAT32 - Name Getting Scheme
	953	; 20h -> No Name To Get (use Partition Name from IPT)
	954	; 40h -> 'L' flag possible
[7]	955	db 'AiRSYS-TABLE'
[37]	956	FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
[29]	957	db 07h, 17h,41h, 08h,017h,21h, 35h,035h,20h,0FCh,017h,41h
	958	db 09h, 19h,11h, 0Bh,01Bh,11h, 0Ch,01Ch,11h,0EBh,0EBh,01h
[7]	959	db 63h, 63h,21h, 81h,081h,21h, 83h,083h,21h, 40h,040h,21h
	960	db 0A5h,0A5h,21h,0A6h,0A6h,21h, 82h,082h,20h,0A7h,0A7h,21h
	961	db 63h, 63h,21h, 4Dh,04Dh,21h, 4Eh,04Eh,21h, 4Fh,04Fh,21h
	962	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	963	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	964	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
	965	db 01h, 01h,01h,0FDh,0FDh,20h, 84h,084h,20h,0A0h,0A0h,20h
	966	db 0Ah, 0Ah,20h,0FEh,0FEh,21h,0FFh,0FFh,21h, 00h,000h,21h
	967	db 16 dup (0)
	968
[46]	969	FileSysNames db 'FAT12 ', 'FAT16 ', 'FAT16Big', 'FAT16Big'
	970	db 'HPFS ', 'NTFS ', 'LVM-Data', 'JFS '
	971	db 'FAT32 ', 'FAT32 ', 'FAT32 ', 'BeOS '
	972	db 'Unix ', 'Minix ', 'Linux ', 'Venix ' ; x row ;)
	973	db 'BSD/386 ', 'OpenBSD ', 'LinuxSwp', 'NeXTSTEP'
	974	db 'GNU HURD', 'QNX ', 'QNX ', 'QNX '
	975	db ' ', ' ', ' ', ' '
	976	db ' ', ' ', ' ', ' '
	977	db ' ', ' ', ' ', ' '
	978	db ' ', 'Kernel ', ' ', '0V-Award'
	979	; db 'OS/2 Man', 'via BIOS', 'Floppy ', 'Unknown '
	980	db 'OS2-BMGR', 'via BIOS', 'Floppy ', 'Unknown '
[7]	981	; -> 44 Partition-Types
	982
[30]	983
	984
	985
[37]	986
	987
[51]	988	;==============================================================================
	989	; Sector 3
	990	;==============================================================================
[30]	991
[51]	992	; -----------------------------------------------------------------------------
	993	; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
	994	; -----------------------------------------------------------------------------
[30]	995
[77]	996	; The entry-point jumped to from the MBR code
[51]	997	ORIGIN 00400h
[30]	998
[43]	999
[77]	1000	;##############################################################################
	1001	;# AiR_BOOT_Start :: This is where the real work begins #
	1002	;# -------------------------------------------------------------------------- #
	1003	;# At this point, all of AirBoot is loaded, including its configuration. #
	1004	;# First, some setup is done, which includes the initialization of variables #
	1005	;# in the BSS. After that, disks are scanned for partitions and the required #
	1006	;# house keeping is done to incorporate changes from the previous boot. Then #
	1007	;# the partition list is prepared and the menu is presented. #
	1008	;##############################################################################
[52]	1009	; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
[36]	1010	AiR_BOOT_Start:
[30]	1011
[36]	1012
[51]	1013	;
	1014	; Enable interrupts.
	1015	;
	1016	sti
[36]	1017
	1018	;
[51]	1019	; Pop the old SS:SP from the stack and save it in the BSS.
[52]	1020	; Note that this is outside the normal variable area that gets cleared.
	1021	; This allows AiR-BOOT to restart itself when debugging and come-up
	1022	; with access to the original values of registers the BIOS passed.
[51]	1023	;
	1024	pop [OldSP]
	1025	pop [OldSS]
	1026
[141]	1027	; Clear the BSS from its real start just upto the end of the variables.
	1028	; Here 'real start' means from where the BSS begins, which is below
	1029	; the point where the first variables are located. The part after
	1030	; the variables is not cleared because that is where the old SS:SP is
	1031	; stored, which is needed for AirBoot restarts during debugging.
	1032	mov bx, offset sobss
	1033	mov cx, offset EndOfVariables - offset sobss
	1034	xor ax, ax
	1035	call FillMemBlock
[51]	1036
[142]	1037	; Initialize the com-port for debugging
	1038	IFDEF AUX_DEBUG
	1039	PUSHRF
	1040	; Init com-port
	1041	call AuxIO_Init
	1042	; Hello message
	1043	mov si, offset [AuxIOHello]
	1044	call AuxIO_Print
	1045	; Show Build Info
	1046	call AuxIO_PrintBuildInfo
	1047	call AuxIO_TeletypeNL
	1048	POPRF
	1049	ENDIF
	1050
	1051	; Dump debug information
	1052	IFDEF AUX_DEBUG
	1053	IF 1
	1054	call DEBUG_Dump1
	1055	ENDIF
	1056	ENDIF
	1057
[117]	1058	; Verify we still got the BIOS disk in DL
	1059	IFDEF AUX_DEBUG
	1060	IF 1
[123]	1061	DBG_TEXT_OUT_AUX '## AiR_BOOT_Start ##'
	1062	PUSHRF
[117]	1063	call DEBUG_DumpRegisters
[123]	1064	POPRF
[77]	1065	ENDIF
[117]	1066	ENDIF
[77]	1067
[117]	1068
[51]	1069	; -----------------------------------------------------------------------------
	1070	; IBM-BM BOOT PREPARATION
	1071	; -----------------------------------------------------------------------------
	1072	;
[36]	1073	; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
	1074	; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
	1075	; signature is required at 3000:0000, FS needs to contain 3000h
	1076	; and the 32-bit LBA address needs to follow the 'I13X' signature.
	1077	; For booting IBM-BM from the second disk, a copy of the MBR of the
	1078	; first disk is also required at 0000:7E00.
	1079	; This information is derived from the eCS 2.x LVM MBR.
	1080	;
	1081	; So, now is a good time to copy the MBR of the first disk to
	1082	; 0000:7E00 in case the partition that will be started is IBM-BM.
	1083	; This copy is located at 8000:0000 and DS already points to this
[51]	1084	; segment. The 'I13X' signature and FS will be setup later.
[36]	1085	;
[37]	1086	pusha ; Save all the general purpose regs
	1087	push es ; We need ES too, so save its value
	1088	xor ax,ax ; Segment 0000h
	1089	mov es,ax ; Make ES point to it
	1090	mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
	1091	mov di,7e00h ; Destination for the MBR for IBM-BM
	1092	mov cx,100h ; 256 words = 512 bytes
	1093	cld ; Direction from low to high
	1094	rep movsw ; Copy the 256 words of the MBR
	1095	pop es ; Restore previous value of ES
	1096	popa ; Restore all the general purpose regs
[36]	1097
	1098
[51]	1099	; -----------------------------------------------------------------------------
	1100	; PRECRAP
	1101	; -----------------------------------------------------------------------------
[36]	1102
[51]	1103	;
	1104	; First it clears the BSS area.
[52]	1105	; Note that the old SS:SP is stored outside this area so this
[51]	1106	; does not get lost.
	1107	; Then initialize various runtime variables and structures.
	1108	;
[52]	1109	; BOOKMARK: Pre Crap
[51]	1110	call PRECRAP_Main
	1111	; Number of harddisks and other system-info is now known.
[43]	1112
[117]	1113	;!
	1114	;! DEBUG_BLOCK
	1115	;! Let's see what the BIOS supplied us with...
	1116	;! Uncomment below to activate.
	1117	;!
	1118	IFDEF AUX_DEBUG
	1119	IF 0
	1120	pushf
	1121	pusha
[45]	1122
[117]	1123	; Print title.
	1124	mov si,offset [bios_reg]
	1125	call AuxIO_Print
	1126	; Save the current stack (SS:SP).
	1127	mov ax,ss
	1128	mov [CurrentSS],ax
	1129	mov [CurrentSP],sp
[30]	1130
[117]	1131	; Restore the old stack.
	1132	mov ss,[OldSS]
	1133	mov sp,[OldSP]
[30]	1134
[117]	1135	; Pop the registers with the BIOS values.
	1136	popa
	1137	; Push them back for AiR-BOOT restart (debug mode).
	1138	pusha
	1139	; Dump them to the serial-port.
	1140	call DEBUG_DumpRegisters
	1141	; Restore the current stack.
	1142	mov ax,[CurrentSS]
	1143	mov ss,ax
	1144	mov sp,[CurrentSP]
[30]	1145
[117]	1146	popa
	1147	popf
	1148	ENDIF
	1149	ENDIF
[30]	1150
[51]	1151
[117]	1152
[145]	1153	; -----------------------------------------------------------------------------
	1154	; UPDATE MBR
	1155	; -----------------------------------------------------------------------------
[144]	1156
[145]	1157	; Write MBR back to disk to sync MBR variables.
	1158	; Otherwise subsequent MBR loads will differ from the RAM stored one,
	1159	; which is used by MBR protection to validate parts of the MBR.
	1160	xor bx, bx ; 0000h - our load address (8000:0000)
	1161	mov cx, 1 ; CHS sector 1, cylinder 0
	1162	xor dh, dh ; CHS head 0
	1163	mov dl, [BIOS_BootDisk] ; The disk we were loaded from
	1164	mov al, 1 ; One sector to write
	1165	mov ah, 03h ; BIOS write disk (legacy)
	1166	int 13h ; Call BIOS
[175]	1167	sti ; Enable ints
[145]	1168	;!
	1169	;! TODO: Check success
	1170	;! Yes, we should check for errors here, coz it would mean AirBoot
	1171	;! was loaded from a disk where the MBR cannot be written !
	1172	;!
	1173
[164]	1174
	1175
[51]	1176	; -----------------------------------------------------------------------------
[144]	1177	; SCAN DISKS
[51]	1178	; -----------------------------------------------------------------------------
[77]	1179
[164]	1180	;!
	1181	;! DEBUG_BLOCK
	1182	;! Dump the registers at this point.
	1183	;!
	1184	IFDEF AUX_DEBUG
	1185	IF 0
	1186	PUSHRF
	1187	call DEBUG_DumpRegisters
	1188	;~ call DEBUG_DumpDriveLetters
	1189	;~ call DEBUG_DumpVolumeLetters
	1190	;~ call DEBUG_DumpPartitionXref
	1191	POPRF
	1192	ENDIF
	1193	ENDIF
	1194
	1195
[144]	1196	;
	1197	; Scan disks for information like size etc.
	1198	;
	1199	call DriveIO_ScanDisks
[77]	1200
[164]	1201	;!
	1202	;! DEBUG_BLOCK
	1203	;! Dump the registers at this point.
	1204	;!
	1205	IFDEF AUX_DEBUG
	1206	IF 0
	1207	PUSHRF
	1208	call DEBUG_DumpRegisters
	1209	;~ call DEBUG_DumpDriveLetters
	1210	;~ call DEBUG_DumpVolumeLetters
	1211	;~ call DEBUG_DumpPartitionXref
	1212	POPRF
	1213	ENDIF
	1214	ENDIF
[77]	1215
	1216
[144]	1217	; -----------------------------------------------------------------------------
	1218	; SCAN FOR PARTITIONS
	1219	; -----------------------------------------------------------------------------
[77]	1220
[51]	1221	;
[144]	1222	; Scan disks for partitions
[51]	1223	;
	1224	call PARTSCAN_ScanForPartitions
[144]	1225
	1226	;
[51]	1227	; Internal Partition Table is now populated.
[144]	1228	;
[51]	1229
[117]	1230	;!
	1231	;! DEBUG_BLOCK
	1232	;! Dump various tables.
	1233	;!
	1234	IFDEF AUX_DEBUG
	1235	IF 0
[164]	1236	PUSHRF
[117]	1237	;~ call DEBUG_DumpIPT
	1238	;~ call DEBUG_DumpPartitionPointers
	1239	;~ call DEBUG_DumpNewPartTable
	1240	;~ call DEBUG_DumpDriveLetters
	1241	;~ call DEBUG_DumpDriveLetters
	1242	;~ call DEBUG_DumpVolumeLetters
	1243	;~ call DEBUG_DumpPartitionXref
[164]	1244	POPRF
[117]	1245	ENDIF
	1246	ENDIF
[49]	1247
[30]	1248
[51]	1249	; -----------------------------------------------------------------------------
	1250	; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
	1251	; -----------------------------------------------------------------------------
	1252
	1253	;
	1254	; Reconnect forced drive-letters to their corresponding
	1255	; partitions.
	1256	;
[52]	1257	; BOOKMARK: Update Driveletters so they are in-sync again
[51]	1258	call PARTSCAN_UpdateDriveLetters
	1259	; Driveletter <-> Partition correlation is now restored.
	1260
	1261
	1262
[117]	1263	;!
	1264	;! DEBUG_BLOCK
	1265	;! Dump various tables.
	1266	;!
	1267	IFDEF AUX_DEBUG
	1268	IF 0
[164]	1269	PUSHRF
[117]	1270	;~ call DEBUG_DumpIPT
	1271	;~ call DEBUG_DumpPartitionPointers
	1272	;~ call DEBUG_DumpNewPartTable
	1273	;~ call DEBUG_DumpDriveLetters
	1274	;~ call DEBUG_DumpDriveLetters
	1275	;~ call DEBUG_DumpVolumeLetters
	1276	;~ call DEBUG_DumpPartitionXref
[164]	1277	POPRF
[117]	1278	ENDIF
	1279	ENDIF
[51]	1280
	1281
	1282	; -----------------------------------------------------------------------------
	1283	; SHOW WE ARE ALIVE
	1284	; -----------------------------------------------------------------------------
	1285
	1286	;
	1287	; Put some info about AiR-BOOT and the system on the screen.
	1288	;
	1289
[49]	1290	; Display number of physical disks found
[165]	1291	IFNDEF AUX_DEBUG
	1292	mov [TextPosY], 3
	1293	ELSE
	1294	mov [TextPosY], 4
	1295	ENDIF
	1296	mov [TextPosX], 0
	1297	mov si, offset [DisksFound]
	1298	call VideoIO_Print
[37]	1299	mov al, [TotalHarddiscs]
[165]	1300	mov [TextColorFore], 0fh
[37]	1301	call VideoIO_PrintByteDynamicNumber
[165]	1302	mov [TextColorFore], 07h
[30]	1303
[49]	1304	; Display number of partitions found
[165]	1305	inc [TextPosY]
	1306	mov [TextPosX], 0
	1307	mov si, offset [PartitionsFound]
	1308	call VideoIO_Print
[37]	1309	mov al, [CFG_Partitions]
	1310	call VideoIO_PrintByteDynamicNumber
[30]	1311
[165]	1312	; Display Phase 1 Indicator
	1313	inc [TextPosY]
	1314	mov [TextPosX], 0
	1315	mov si, offset [Phase1]
	1316	call VideoIO_Print
	1317	mov si, offset [OS2_InstallVolume]
	1318	mov al, [si]
	1319	test al,al ; See if phase 1 is active
	1320	jnz @F
	1321	mov si, offset [No]
	1322	@@:
	1323	call VideoIO_Print
[30]	1324
[167]	1325	; Display information about the disks found
	1326	call VideoIO_DisplayDiskInfo
[30]	1327
	1328
	1329
[51]	1330	; -----------------------------------------------------------------------------
[164]	1331	; OS/2 PHASE1 CHECK
[51]	1332	; -----------------------------------------------------------------------------
	1333
	1334	;
[67]	1335	; BOOKMARK: Check for OS/2 being installed
	1336	; Here we check if OS/2 is being installed.
[51]	1337	; If so, we forgo the menu and directly boot it.
	1338	;
	1339
	1340	; If the first byte of the name of the Install Volume is not 0
[49]	1341	; then we potentially have a phase1 boot.
[67]	1342	test byte ptr [OS2_InstallVolume],0ffh
[49]	1343	; Nope, so continue normally.
	1344	jz MBR_Main_ContinueBoot
[36]	1345
[49]	1346	; Setup phase1.
	1347	; It is still possible that a name was set for the
	1348	; Install Volume that does not exist.
	1349	; In that case CY will be clear and AL=0FFh.
	1350	call PART_SetupPhase1
	1351	; Oops, Install Volume not found, continue normally.
	1352	jnc MBR_Main_ContinueBoot
[30]	1353
	1354
[51]	1355	;
[49]	1356	; == Install Volume Found ==
[51]	1357	;
[30]	1358
[51]	1359
[117]	1360	;!
	1361	;! DEBUG_BLOCK
	1362	;! Dump various tables.
	1363	;!
	1364	IFDEF AUX_DEBUG
	1365	IF 0
[164]	1366	PUSHRF
[117]	1367	;~ call DEBUG_DumpIPT
	1368	;~ call DEBUG_DumpPartitionPointers
	1369	;~ call DEBUG_DumpPartitionXref
	1370	;~ call DEBUG_DumpNewPartTable
	1371	;~ call DEBUG_DumpDriveLetters
[164]	1372	POPRF
[117]	1373	ENDIF
	1374	ENDIF
[51]	1375
	1376
[67]	1377	; BOOKMARK: Scan for Partitions (Only if OS/2 install going on)
[51]	1378	; Because one or more partitions are possibly added, the
	1379	; PartitionXref table is not 'in sync' and could cause the
	1380	; wrong system to be automatically booted.
	1381	; So we rescan all partitions causing the PartitionXref
	1382	; table to be filled with correct values so the auto-boot
	1383	; from the new partition will work correctly.
[49]	1384	call PARTSCAN_ScanForPartitions
[30]	1385
	1386
[117]	1387	;!
	1388	;! DEBUG_BLOCK
	1389	;! Dump various tables.
	1390	;!
	1391	IFDEF AUX_DEBUG
	1392	IF 0
[164]	1393	PUSHRF
[117]	1394	;~ call DEBUG_DumpIPT
	1395	;~ call DEBUG_DumpPartitionPointers
	1396	;~ call DEBUG_DumpPartitionXref
	1397	;~ call DEBUG_DumpNewPartTable
	1398	;~ call DEBUG_DumpDriveLetters
[164]	1399	POPRF
[117]	1400	ENDIF
	1401	ENDIF
[30]	1402
[51]	1403	; Setup automatic boot to forgo the Menu.
	1404	; PART_SetupPhase1 has filled in the other variables.
	1405	mov byte ptr [CFG_AutomaticBoot],1
[30]	1406
[51]	1407	;
	1408	; At this point the AiR-BOOT configuration has been altered
	1409	; to automatically boot the newly installed system without
	1410	; displaying the menu.
	1411	; Code further down the road will take care of that.
	1412	;
[49]	1413	jmp MBR_Main_ContinueBoot
[30]	1414
	1415
[49]	1416
	1417
[51]	1418	;
	1419	; Wether a new system is being installed or not,
	1420	; booting continues here.
	1421	;
	1422	MBR_Main_ContinueBoot:
[49]	1423
[51]	1424	;
	1425	; Inform user how to switch between post-screen and menu
	1426	; by putting this info on the screen.
	1427	;
[165]	1428	mov [TextPosY], 23
	1429	mov [TextPosX], 0
	1430	mov si, offset [TABMessage]
	1431	call VideoIO_Print
	1432	inc [TextPosY]
	1433	mov [TextPosX], 57
[37]	1434	call MBR_TeletypeSyncPos
[165]	1435	mov si, offset [PREPMessage]
[37]	1436	call MBR_TeletypeBold
[165]	1437	mov al,30
	1438	call TIMER_WaitTicCount
	1439	mov cl, sizeof [PREPMessage]
	1440	mov al, ' '
	1441	call VideoIO_PrintSingleMultiChar
[30]	1442
[165]	1443	mov [TextPosX], 25
	1444	mov si, offset [BootEndMsg2]
	1445	add si, 39
	1446	mov [TextColorFore], 08h
	1447	call VideoIO_Print
[30]	1448
[164]	1449
[51]	1450	;
	1451	; Debug stop.
	1452	;
[30]	1453
[37]	1454	;
	1455	; ####################### WAIT FOR KEY ########################
	1456	;
[30]	1457
[37]	1458	; Wait for key so we can see debug log if ab-menu hangs.
[49]	1459	;~ xor ax, ax
	1460	;~ int 16h
[37]	1461	;call SOUND_Beep
[30]	1462
	1463
[51]	1464	; Copy BIOS POST to Second Page
[37]	1465	mov ax, VideoIO_Page1
[51]	1466	call VideoIO_BackUpTo
[30]	1467
[37]	1468	;call SOUND_Beep
[30]	1469
	1470
[52]	1471	; BOOKMARK: Save Configuration
[37]	1472	; Save configuration so phase1 boot-through is disabled
	1473	; on next boot.
[67]	1474	mov byte ptr [OS2_InstallVolume], 0
[37]	1475	call DriveIO_SaveConfiguration
[31]	1476
	1477
	1478
[37]	1479	;
[51]	1480	; See if setup needs to be entered.
[37]	1481	;
	1482	MBR_Main_ReEnterSetup:
	1483	call SETUP_CheckEnterSETUP
[7]	1484
[51]	1485	;
	1486	; Do some post processing.
	1487	;
[52]	1488	; BOOKMARK: After Crap
[37]	1489	call AFTERCRAP_Main
[30]	1490
[37]	1491	MBR_Main_ReEnterBootMenuPre:
	1492	; SetUp PartitionPointers for BootMenu (filter non-bootable)
	1493	call PART_CalculateMenuPartPointers
[7]	1494
[37]	1495	; ...and count that one...
[46]	1496	cmp byte ptr [PartitionPointerCount], 0
[37]	1497	jne MBR_Main_SomethingBootAble
	1498	mov si, offset TXT_NoBootAble
	1499	call MBR_Teletype
	1500	jmp MBR_HaltSystem
[30]	1501
[37]	1502	MBR_Main_SomethingBootAble:
	1503	; FixUp Values, define Timed Setup booting, etc.
	1504	call PART_FixUpDefaultPartitionValues
[7]	1505
[30]	1506
	1507
[37]	1508	; -------------------------------------------------- BOOT-MENU
	1509	MBR_Main_ReEnterBootMenu:
	1510	call BOOTMENU_ResetMenuVars ; reset has to be done
[46]	1511	test byte ptr [CFG_AutomaticBoot], 1
[37]	1512	jz MBR_Main_NoAutomaticBooting
[49]	1513
	1514
[37]	1515	; ------------------------------------------ AUTOMATIC BOOTING
	1516	; Select automatic partition, disable automatic booting for
	1517	; next time and boot system...
[46]	1518	mov byte ptr [CFG_AutomaticBoot], 0
[37]	1519	call PASSWORD_AskSystemPwd
	1520	mov al, Menu_EntryAutomatic
[30]	1521
[37]	1522	;mov al, 2
[30]	1523
[37]	1524	mov Menu_EntrySelected, al ; zero based
	1525	jmp MBR_Main_NoBootMenu
[7]	1526
[30]	1527
[49]	1528	MBR_Main_NoAutomaticBooting:
	1529
[37]	1530	;call SOUND_Beep
[30]	1531
[46]	1532	test byte ptr [CFG_BootMenuActive], 0FFh
[37]	1533	jnz MBR_Main_GotBootMenu
	1534	; ----------------------------------------------- NO BOOT-MENU
	1535	; Select default partition and boot system...
	1536	call PASSWORD_AskSystemPwd
[30]	1537
[37]	1538	mov al, Menu_EntryDefault
	1539	;mov al,0 ; zero based
	1540	mov Menu_EntrySelected, al
	1541	jmp MBR_Main_NoBootMenu
[7]	1542
[37]	1543	MBR_Main_GotBootMenu:
	1544	; ------------------------------------------ BOOT-MENU VISUALS
[51]	1545
	1546
	1547	IFDEF FX_ENABLED
[37]	1548	call FX_StartScreen
[51]	1549	ENDIF
[30]	1550
[52]	1551	; BOOKMARK: Build Main Menu
[37]	1552	call BOOTMENU_BuildBackground
	1553	call BOOTMENU_BuildMain
[51]	1554
	1555	IFDEF FX_ENABLED
[37]	1556	call FX_EndScreenRight
[51]	1557	ENDIF
	1558
[37]	1559	call PASSWORD_AskSystemPwd
	1560	call BOOTMENU_ResetTimedBoot
[30]	1561
[52]	1562	; BOOKMARK: Display Main Menu
[37]	1563	call BOOTMENU_Execute
[30]	1564
[37]	1565	jc MBR_Main_ReEnterSetup
	1566	call BOOTMENU_SetVarsAfterMenu
[30]	1567
[37]	1568	; ---------------------------------------------------- BOOTING
	1569	MBR_Main_NoBootMenu:
[51]	1570
	1571	IFDEF FX_ENABLED
[37]	1572	call FX_StartScreen
[51]	1573	ENDIF
	1574
[164]	1575	IFDEF AUX_DEBUG
	1576	IF 0
	1577	DBG_TEXT_OUT_AUX 'HALTING'
	1578	PUSHRF
	1579	;~ call DEBUG_DumpRegisters
	1580	;~ call AuxIO_DumpParagraph
	1581	;~ call AuxIO_TeletypeNL
	1582	@@: jmp @B
	1583	POPRF
	1584	ENDIF
	1585	ENDIF
[52]	1586	; BOOKMARK: Display bye-screen and start selected partition
[37]	1587	call BOOTMENU_BuildGoodBye
[51]	1588
	1589	IFDEF FX_ENABLED
[37]	1590	call FX_EndScreenRight
[51]	1591	ENDIF
	1592
[37]	1593	call PASSWORD_AskChangeBootPwd
[7]	1594
[37]	1595	call ANTIVIR_SaveBackUpMBR
[7]	1596
[49]	1597	; Preload the selected menu-entry
[67]	1598	; However, this value will be wrong if OS/2 phase1 is
[49]	1599	; active and the installation partition is newly created.
	1600	; See below for the adjustment.
	1601	mov dl, byte ptr [Menu_EntrySelected]
	1602
[51]	1603
	1604	;
	1605	; Prepare to start the partition.
	1606	;
[49]	1607	jmp MBR_Main_StartPartition
	1608
	1609
	1610
[51]	1611	; -----------------------------------------------------------------------------
	1612	; START PARTITION
	1613	; -----------------------------------------------------------------------------
	1614
[49]	1615	MBR_Main_StartPartition:
	1616
[117]	1617	IFDEF AUX_DEBUG
	1618	IF 0
[164]	1619	PUSHRF
[117]	1620	;~ call DEBUG_DumpIPT
	1621	;~ call DEBUG_DumpPartitionPointers
	1622	;~ call DEBUG_DumpPartitionXref
	1623	;~ call DEBUG_DumpNewPartTable
[164]	1624	POPRF
[117]	1625	ENDIF
	1626	ENDIF
[49]	1627
	1628
[37]	1629	; -------------------------------------------- START PARTITION
[51]	1630	; THIS DOES NOT RETURN !
[37]	1631	call PART_StartPartition
[30]	1632
	1633
[31]	1634
[51]	1635
[30]	1636	;
[51]	1637	; This entry-point restarts AiR-BOOT almost from scratch.
	1638	; It skips the movement of the MBR but otherwise it is a functional restart.
	1639	; The old BIOS SS:SP where the registers on entry are stored is passed along.
[52]	1640	; This entry-point is used for debugging purposes.
[51]	1641	;
[52]	1642	; BOOKMARK: AiR-BOOT Restart (used for debugging)
[51]	1643	AirbootRestart:
[79]	1644	mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
	1645	mov cx, [OldSS] ; Old SS when BIOS transferred control to AB
	1646	xor dh, dh ; Head 0
	1647	mov dl, [BIOS_BootDisk] ; Disk AirBoot was loaded from
[51]	1648	jmp MBR_RealStart
	1649
	1650
	1651	;
	1652	; This entry-point displays a popup that the system is halted
	1653	; and then halts the system.
	1654	; It is entered on severe error conditions.
	1655	;
[52]	1656	; BOOKMARK: Halt System
[51]	1657	HaltSystem:
	1658	call VideoIO_ClearScreen
	1659	mov ax,0ababh
	1660	mov cx, 0C04h
	1661	mov si, offset SystemHalted
	1662	call SETUP_ShowErrorBox
	1663	; Halt the system.
	1664	jmp MBR_HaltSystem
	1665
	1666
	1667
	1668
	1669
	1670
	1671	;
[52]	1672	; The following section includes various assembler modules
	1673	; at the source level. These contain functionality for a
	1674	; multitude of categories like disk-access, video-io, lvm,
	1675	; debugging, etc. Later versions of AiR-BOOT will use such
	1676	; modules at the object-file level so they can be shared
	1677	; more easily.
[51]	1678	;
	1679
	1680
	1681	; -----------------------------------------------------------------------------
	1682	; INCLUDED FILE SECTION
	1683	; -----------------------------------------------------------------------------
	1684
[52]	1685	; BOOKMARK: Include Section
	1686
[51]	1687	;
[30]	1688	; Include other code-modules here.
	1689	;
[51]	1690
[30]	1691	b_std_txt:
[60]	1692	include regular/std_text.asm ; Standard (non-translateable text)
[30]	1693	size_std_txt = $-b_std_txt
	1694
	1695	b_driveio:
[60]	1696	include regular/driveio.asm ; Drive I/O, Config Load/Save
[30]	1697	size_driveio = $-b_driveio
	1698
[43]	1699	b_lvm:
[60]	1700	include special/lvm.asm ; LVM-specific code
[43]	1701	size_lvm = $-b_lvm
	1702
[30]	1703	b_videoio:
[60]	1704	include regular/videoio.asm ; Video I/O
[30]	1705	size_videoio = $-b_videoio
	1706
	1707	b_timer:
[60]	1708	include regular/timer.asm ; Timer
[30]	1709	size_timer = $-b_timer
	1710
	1711	b_partmain:
[60]	1712	include regular/partmain.asm ; Regular Partition Routines
[30]	1713	size_partmain = $-b_partmain
	1714
	1715	b_partscan:
[60]	1716	include regular/partscan.asm ; Partition Scanning
[30]	1717	size_partscan = $-b_partscan
	1718
	1719	b_bootmenu:
[60]	1720	include regular/bootmenu.asm ; Boot-Menu
[30]	1721	size_bootmenu = $-b_bootmenu
	1722
	1723	b_password:
[60]	1724	include regular/password.asm ; Password related
[30]	1725	size_password = $-b_password
	1726
	1727	b_other:
[60]	1728	include regular/other.asm ; Other Routines
[30]	1729	size_other = $-b_other
[7]	1730
[30]	1731	b_main:
[60]	1732	include setup/main.asm ; The whole AiR-BOOT SETUP
[30]	1733	size_main = $-b_main
	1734
	1735	b_math:
[60]	1736	include regular/math.asm ; Math functions (like 32-bit multiply)
[30]	1737	size_math = $-b_math
	1738
	1739	b_txtother:
[60]	1740	include text/txtother.asm ; All translateable Text-Strings
[30]	1741	size_txtother = $-b_txtother
	1742
	1743	b_txtmenus:
[60]	1744	include text/txtmenus.asm ; All translateable Menu-text
[30]	1745	size_txtmenus = $-b_txtmenus
	1746
	1747	b_charset:
[60]	1748	include text/charset.asm ; Special Video Charsets (if needed)
[30]	1749	size_charset = $-b_charset
	1750
[36]	1751	b_conv:
[60]	1752	include regular/conv.asm ; Various conversion routines
[36]	1753	size_conv = $-b_conv
[30]	1754
	1755	b_virus:
[60]	1756	include special/virus.asm ; Virus Detection / Anti-Virus
[30]	1757	size_virus = $-b_virus
[51]	1758
[30]	1759	b_billsuxx:
[60]	1760	include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
[30]	1761	size_billsuxx = $-b_billsuxx
	1762
	1763	b_sound:
[60]	1764	include special/sound.asm ; Sound
[30]	1765	size_sound = $-b_sound
	1766
	1767	b_apm:
[60]	1768	include special/apm.asm ; Power Managment Support
[30]	1769	size_apm = $-b_apm
	1770
[51]	1771
	1772
	1773	;
	1774	; Cyrillic support.
	1775	;
	1776	IFDEF TXT_IncludeCyrillic
	1777	b_ccharset:
[60]	1778	include special/charset.asm ; Charset Support (e.g. Cyrillic)
[51]	1779	size_ccharset = $-b_ccharset
	1780	ENDIF
	1781
	1782	; Various debugging routines, uses AUXIO and CONV
	1783	IFDEF AUX_DEBUG
	1784	b_debug:
[60]	1785	include regular/debug.asm ; Debug module
[51]	1786	size_debug = $-b_debug
	1787	b_auxio:
[60]	1788	include regular/auxio.asm ; Com-port support for debugging
[51]	1789	size_auxio = $-b_auxio
	1790	ENDIF
	1791
	1792	;
	1793	; We only include this if FX_ENABLED is defined.
	1794	; FX is disabled when debugging to have more room for debug-code.
	1795	; The module compiles to 50eh = 1294 bytes, so that is a lot.
	1796	;
	1797	IFDEF FX_ENABLED
[30]	1798	b_fx:
[60]	1799	include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
[30]	1800	size_fx = $-b_fx
[51]	1801	ENDIF
[30]	1802
	1803
[51]	1804	;
	1805	; End of code marker.
	1806	;
[52]	1807	; BOOKMARK: END OF CODE
[51]	1808	db 'BABE'
	1809	db 'FACE'
[30]	1810
[47]	1811
[51]	1812	; -----------------------------------------------------------------------------
	1813	; END OF CODE
	1814	; -----------------------------------------------------------------------------
	1815	code_end:
	1816
	1817
	1818
	1819
	1820
	1821
	1822
	1823
	1824
	1825
	1826	; -----------------------------------------------------------------------------
	1827	; BLDLEVEL INFORMATION
	1828	; -----------------------------------------------------------------------------
	1829
[52]	1830	; BOOKMARK: BLDLEVEL Information
[51]	1831	ORIGIN 068A0h
	1832
	1833	;
	1834	; The space between this offset and code_end is the space
	1835	; available for code.
	1836	;
	1837	zzz_code_space = $ - code_end
	1838
	1839
[46]	1840	bld_level:
[43]	1841	;
[46]	1842	; Here we insert the OS/2 BLDLEVEL Information.
	1843	; It is composed of the AiR-BOOT version-info and other
[51]	1844	; information. It is unique for each release of AiR-BOOT.
[46]	1845	;
[51]	1846
	1847	;
[47]	1848	; ?? When AUX_DEBUG is enabled and the above org is active,
	1849	; the BLDLEVEL gets corrupted eventhough it gets inserted here
	1850	; explicitly. The effect is almost like an 'OR' or a merge
	1851	; with the already generated FX code.
	1852	; Tasm and JWasm produce different results.
	1853	; ??
	1854	;
[46]	1855	InsertBuildLevel
	1856
[47]	1857
[30]	1858
[7]	1859
	1860
[51]	1861	;==============================================================================
	1862	; Sector 53
	1863	;==============================================================================
	1864
[45]	1865	;
[51]	1866	; From here on, the layout of the image consists of:
	1867	; - AiR-BOOT Protection Image
	1868	; - AiR-BOOT Configuration
	1869	; - DriveLetters
	1870	; - Install Volume
	1871	; - Floppy/CDROM/BIOS BOOT ENTRIES
	1872	; - Internal Partition Table (IPT)
	1873	; - Hidden Partition Table (HPT)
	1874	; - MBR Backup
[45]	1875	;
[7]	1876
[37]	1877	;
[51]	1878	; After that, the BSS follows with several runtime
	1879	; variables and structures.
	1880	; The BSS is not part of the image on disk of course.
	1881	;
	1882
	1883	; -----------------------------------------------------------------------------
	1884	; PROTECTION IMAGE
	1885	; -----------------------------------------------------------------------------
	1886
	1887	;
[52]	1888	; This is the AiR-BOOT MBR Protection Image.
[46]	1889	; The stuff generated here gets overwritten when the
[51]	1890	; MBR_PROT module, which is assembled separately,
	1891	; gets binary merged.
[37]	1892	; So you won't find the string below in the generated binary.
	1893	;
[52]	1894	; BOOKMARK: AiR-BOOT MBR Protection Image
[51]	1895	ORIGIN 06900h
[46]	1896
	1897
[51]	1898
	1899
[46]	1900	;
[51]	1901	; Hardcoded to 768 bytes (MBR_PROT.ASM)
[46]	1902	; The string below is searched for by the FIXCODE helper and must be
[51]	1903	; page (256 bytes) aligned.
[46]	1904	;
[51]	1905	; It seems to be possible to shrink the protection-image to 768 bytes.
	1906	; That gives us an additional 256 bytes of code-space.
	1907	; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
	1908	; Also the granularity needs to change from 512 bytes to 256 bytes since
	1909	; 6900h is not a 512-byte boundary.
	1910	;
	1911	; 20120908 - Done.
	1912	;
[37]	1913	MBR_Protection db 'AiR-BOOT MBR-Protection Image'
	1914
[43]	1915	; Just fill.
[51]	1916	;~ db 1024-($-MBR_Protection) dup('M')
	1917	db 768-($-MBR_Protection) dup('M')
[37]	1918
	1919
[51]	1920
	1921
	1922
	1923
	1924
[31]	1925	;==============================================================================
[51]	1926	; Sector 55
	1927	;==============================================================================
	1928	; -----------------------------------------------------------------------------
	1929	; AiR-BOOT CONFIGURATION
	1930	; -----------------------------------------------------------------------------
[30]	1931
[37]	1932	;
	1933	; This section contains the AiR-BOOT configuration.
	1934	; Note that it has a version that should be updated
	1935	; when stuff is added.
	1936	; Also add stuff to the end so that offsets of other
	1937	; variables remain vaild.
	1938	;
[52]	1939	; BOOKMARK: AiR-BOOT Configuration Sector
[45]	1940	ORIGIN 06C00h
[30]	1941
[37]	1942	Configuration:
[69]	1943	; This is the signature for the AiR-BOOT Configuration.
	1944	; Note that this configuration section, like the code section,
	1945	; is CRC protected. This means that poking values in these
	1946	; sections on the disk will invalidate AiR-BOOT and cause it
	1947	; to halt. This is a protection method against other software
	1948	; modifying stuff in track 0.
	1949	db 'AiRCFG-TABLE',0adh
[55]	1950	db 01h, 10h, 'U' ; "Compressed" ID String
[37]	1951	; Version 1.02 was for code 1.06, 1.03 was internal
	1952	; and 1.04,1.05 and 1.06 do not exist.
[46]	1953	;
	1954	; 1.07 was used with AB v1.07 and introduced the phase1
	1955	; system-name. For the rest it is compatible with v1.02.
	1956	;
	1957	; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
	1958	; of several components and the packing of the hideparttable.
	1959	; The core configuration has not changed but the generated
	1960	; configuration has. The v1.0.8 installer handles upgrading.
	1961	;
[54]	1962	; It has been decided that uneven minor numbers will be
	1963	; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
[60]	1964	;
[37]	1965	; It is not required for the config to have the
	1966	; same version as the code, so in the future
	1967	; the code version might be higher than the
	1968	; config version if there are no changes to the latter.
[46]	1969	;
[7]	1970
[37]	1971	CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
	1972	CFG_LastTimeEditHi dw 0 ; second 16 bit part...
[7]	1973
[37]	1974	CFG_CheckConfig dw 0 ; Check-Sum for Configuration
[7]	1975
[37]	1976	CFG_Partitions db 0 ; Count of partitions in IPT
[51]	1977	CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
[37]	1978	CFG_PartDefault db 0 ; Default-Partition (Base=0)
[7]	1979
[37]	1980	CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
[176]	1981	CFG_TimedBoot db 1 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
[37]	1982	CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
	1983	CFG_TimedDelay dw 123 ; Timed Boot - Delay
	1984	CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
	1985	CFG_RememberBoot db 1 ; Remember Manual Boot Choice
	1986	CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
	1987	CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
	1988	CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
[7]	1989	; v0.29+ -> 2 - Detailed Bootmenu
[37]	1990	CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
	1991	CFG_PasswordSetup db 0 ; Ask Password when entering Setup
	1992	CFG_PasswordSystem db 0 ; Ask Password when booting System
	1993	CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
	1994	CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
	1995	CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
	1996	CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
	1997	CFG_DetectVirus db 0 ; Detect Virus ?
	1998	CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
	1999	CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
	2000	CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
	2001	CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
	2002	dw 07A53h
	2003	dw 0E797h
	2004	dw 0A896h
	2005	CFG_BootPassword dw 0101Fh ; Another CR... ;-)
	2006	dw 07A53h
	2007	dw 0E797h
	2008	dw 0A896h
	2009	db 0 ; Rude-Protection - Removed since v0.28b
	2010	CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
	2011	CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
	2012	; 0 - Do Nothing
	2013	; 1 - Reset Time
	2014	; 2 - Stop Time
	2015	CFG_MakeSound db 0 ; Should be clear ;)
	2016	CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
[51]	2017	CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
[37]	2018	; 0 - Disabled
	2019	; 1 - CD-ROM
	2020	; 2 - Network
	2021	; 3 - ZIP/LS120
	2022	CFG_CooperBars db 0 ; If Cooper Bars should be shown
	2023	CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
	2024	CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
	2025	; FFh -> Disabled
	2026	CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
	2027	CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
	2028	CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
	2029	CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
	2030	CFG_PartAutomatic db 0 ; Partition-No for automatic booting
	2031	CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
	2032	CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
[7]	2033
[30]	2034
	2035	;
	2036	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2037	;
	2038
[45]	2039	;
	2040	; Drive Letters.
	2041	;
[52]	2042	; BOOKMARK: Stored Drive Letters
[45]	2043	ORIGIN 06CB0h
[30]	2044
	2045
[51]	2046	; -----------------------------------------------------------------------------
	2047	; DRIVE LETTERS
	2048	; -----------------------------------------------------------------------------
	2049
[45]	2050	;
	2051	; Moved here to make room for packed hiddenparttable.
[71]	2052	; This gets filled with drive-letters that are assigned using the dl-feature.
[45]	2053	;
	2054	DriveLetters db LocIPT_MaxPartitions dup (0)
	2055	; Format is:
	2056	;============
	2057	; Drive-Letter : BYTE (80h-C:, 81h-D:)
	2058	; --------------------> 1 Byte * 45
[30]	2059
[51]	2060
	2061
	2062	; -----------------------------------------------------------------------------
	2063	; INSTALL VOLUME
	2064	; -----------------------------------------------------------------------------
	2065
[45]	2066	;
[37]	2067	; Allways have the name of the installation volume
	2068	; at this offset.
	2069	; So future config changes will not break auto-install.
[45]	2070	;
[67]	2071	; BOOKMARK: Name of OS/2 Installation Volume
[45]	2072	ORIGIN 06D00h
[37]	2073
[67]	2074	; SET(A)BOOT stores the volume name of the OS/2 system being installed here.
[31]	2075	; It is truncated to 11 chars because AiR-BOOT currently does not support
	2076	; longer labelnames. The name is also capitalized.
[67]	2077	OS2_InstallVolume db 0,'NOPHASEONE' ,0
[30]	2078
[37]	2079	;
	2080	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
	2081	;
	2082
[51]	2083
	2084	; -----------------------------------------------------------------------------
	2085	; FLOPPY/CDROM/BIOS BOOT ENTRIES
	2086	; -----------------------------------------------------------------------------
	2087
[37]	2088	;
	2089	; 06DABh - 06C00h = 01ABh = 427 bytes.
	2090	; Entries allocated down from 06E00 boundary.
	2091	;
[52]	2092	; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
[46]	2093	ORIGIN 06DABh ; 427 Boundry
[37]	2094
	2095	; (432 - 5 = 427)
	2096	AutoDrvLetter db 0
	2097	AutoDrvLetterSerial dd 0
	2098
	2099	; This entry is also 34 bytes long (466 - 34 = 432)
	2100	BIOScontIPTentry:
	2101	db 0, 0, 0, 0, ' '
	2102	db 0, 0FEh, Flags_Bootable
	2103	dw 0 ; No Checksum :)
	2104	db 0, 1, 0
	2105	db 0, 1, 0 ; Location of Partition/Boot Record
	2106	dd 0, 0
	2107
[7]	2108	; VIR variables are for the AiR-BOOT Anti Virus Code
	2109	; Most of them are backups of Interrupt Points, so we can check, if a
	2110	; stealth virus is on-line, we can intercept its call.
	2111	; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
[46]	2112	; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
	2113	; system from working, so the user has to press reset.
	2114	; That's saver than a Reboot.
[7]	2115	;
	2116	; If a virus is found on the partition to boot, the system will ONLY halt,
	2117	; nothing more, because we can not remove it. The user shall do it :)
	2118	; Those viruses are detected via a real nasty method...Checksum-Checking of the
	2119	; boot-record, which is to be executed. If it does not match the one in our
	2120	; internal partition table, we will stop. You may however switch this detection
	2121	; off or just reset it by switching 'VIBR Detection'.
	2122
[37]	2123	; 478 - 12 = 466 ; 466 Sub-Part
	2124	CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
	2125	CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
	2126	CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
[30]	2127
[37]	2128	; 478 Boundry (512-34)
	2129	; This entry is also 34 bytes long
	2130	FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
	2131	db 0, 0FFh, Flags_Bootable
	2132	dw 0 ; No Checksum :)
	2133	db 0, 1, 0
	2134	db 0, 1, 0 ; Location of Partition/Boot Record
	2135	dd 0, 0
[30]	2136
	2137
[51]	2138
	2139	; -----------------------------------------------------------------------------
	2140	; INTERNAL PARTITION TABLE (IPT)
	2141	; -----------------------------------------------------------------------------
	2142
[45]	2143	;
	2144	; AiR-BOOT Internal Partition Table (IPT)
	2145	;
[52]	2146	; BOOKMARK: Internal Partition Table
[45]	2147	ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
[30]	2148
	2149
[45]	2150	;
	2151	; Rousseau: This is the start of the AiR-BOOT IPT
	2152	;
	2153	PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
	2154	; no-partitions detected... :]
[7]	2155	; db 1, 0, 0, 0, 'Harddisc 1'
	2156	; db 0, 0FFh, Flags_BootAble
	2157	; dw 0 ; No Checksum :)
	2158	; db 0, 0, 1
[46]	2159	; db 0, 0, 1 ; Location of Partition/Boot Record
[7]	2160	; dd 0, 0
	2161
[37]	2162	; Format is:
	2163	;============
	2164	; SerialNumber * 4
	2165	; PartitionName * 11
	2166	; Drive * 1
	2167	; SystemID * 1 (means the partition type)
	2168	; Flags * 1
	2169	; Checksum * 2 (for virus checking)
	2170	; LocationBegin * 3 (where the partition begins)
	2171	; LocationPartTab * 3 (where the partition table is)
	2172	; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
	2173	; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
	2174	; --------------------> 34 Bytes (total maximum partition-entries = 30)
[7]	2175
[30]	2176
[37]	2177
	2178	; No need to check overlap here because this string will
	2179	; be overwritten if the maximum partition count is reached.
	2180	; So this is not a critical boundary.
[45]	2181	ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
[37]	2182
	2183	db 'AiRBOOTPAR' ; 1K internal partition table
[30]	2184
	2185
	2186
[51]	2187	; -----------------------------------------------------------------------------
	2188	; HIDDEN PARTITION TABLE (HPT)
	2189	; -----------------------------------------------------------------------------
[30]	2190
[45]	2191	;
	2192	; Hidden Partition Table (6-bit packed as of v1.0.8)
	2193	;
[52]	2194	; BOOKMARK: Hidden Partition Table (packed)
[45]	2195	ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
[30]	2196
[38]	2197	HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
[37]	2198	; Format is:
	2199	;============
	2200	; PartitionPtr : BYTE * 30
[38]	2201	; --------------------> 30 Bytes * 45
[30]	2202
[37]	2203	;
[45]	2204	; Driveletters were here.
	2205	; Moved down to make room for packed hideparttable.
	2206	;
[30]	2207
[37]	2208
[45]	2209	;
	2210	; End of hidden partition table.
	2211	; Check overlap here for security reasons.
	2212	;
	2213	ORIGIN % (image_size - 200h - 5)
[30]	2214
[45]	2215	; 79fa - end of packed hide table
	2216	db 'ABHID' ; 1K internal Hide-partition table
[30]	2217
	2218
	2219
	2220
[51]	2221	;==============================================================================
	2222	; Sector 62
	2223	;==============================================================================
	2224	; -----------------------------------------------------------------------------
	2225	; MBR BACKUP
	2226	; -----------------------------------------------------------------------------
[37]	2227
[45]	2228	;
	2229	; AiR-BOOT MBR Backup.
	2230	;
[52]	2231	; BOOKMARK: MBR Backup
[45]	2232	ORIGIN % (image_size - 200h)
[37]	2233
[31]	2234
[46]	2235	MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
	2236	' - Just to fill this sector with something',0
[37]	2237	AirBootRocks db 'AiR-BOOT Rocks!',0
[7]	2238
[45]	2239	db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
[36]	2240
[45]	2241	; End of Image signature.
	2242	;
	2243	ORIGIN % (image_size - 2)
	2244	dw 0BABEh
[30]	2245
	2246
[45]	2247	;
	2248	; End of Image.
	2249	;
	2250	ORIGIN % (image_size)
[97]	2251	image_end:
[30]	2252
	2253	;
[51]	2254	; Terminate LDRIMAGE segment.
[30]	2255	;
[51]	2256	IFDEF SEGMENTED
[43]	2257	LDRIMAGE ENDS
[51]	2258	ENDIF
[30]	2259
[37]	2260
[51]	2261
	2262
	2263
	2264
	2265
	2266	;##############################################################################
	2267	; BSS SEGMENT
	2268	;##############################################################################
	2269
[52]	2270	; BOOKMARK: BSS Segment
[51]	2271
[30]	2272	;
[51]	2273	; Open BSS segment.
[30]	2274	;
[51]	2275	IFDEF SEGMENTED
[37]	2276	VOLATILE SEGMENT USE16 PUBLIC 'BSS'
	2277	ENDIF
	2278
[46]	2279
	2280
[30]	2281	sobss:
[112]	2282	sobss_abs = offset sobss + image_size
[31]	2283	;------------------------------------------------------------------------------
[46]	2284
	2285
[112]	2286	;
	2287	; This is the actual start of the BSS.
	2288	; In the past however, we have had a code-loop that went out of bounds,
	2289	; overwriting the start of the BSS.
	2290	;
	2291	; Because important runtime data is stored in the BSS, we offset it
	2292	; by 400h bytes. Since the loader-image is always 62 sectors, which
	2293	; makes it 7c00h in size, the runtime data starts at 8000h.
	2294	; This is the 'BeginOfVariables' location.
	2295	;
[37]	2296
[112]	2297
[46]	2298	;
	2299	; If segmented, offsets are relative to the BSS segment.
	2300	; They are resolved at link-time.
	2301	; If not segmented, offsets are relative to the CODE segment.
	2302	;
	2303	IFDEF SEGMENTED
[112]	2304	ORG 00400h ; 7c00h + 400h = 8000h
[46]	2305	ELSE
[112]	2306	ORG 08000h ; 8000h
[46]	2307	ENDIF
	2308
	2309
[51]	2310	; -----------------------------------------------------------------------------
	2311	; START OF BSS DATA
	2312	; -----------------------------------------------------------------------------
[7]	2313	; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
	2314	BeginOfVariables:
[112]	2315	BeginOfVariablesAbs = offset BeginOfVariables + image_size
[51]	2316
	2317
	2318	; -----------------------------------------------------------------------------
	2319	; SECTOR BUFFERS
	2320	; -----------------------------------------------------------------------------
[52]	2321	; BOOKMARK: Sector Buffers
[46]	2322	PartitionSector db 512 dup (?) ; Temporary Sector for Partition
[51]	2323	PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
[46]	2324	LVMSector db 512 dup (?) ; Temporary Sector for LVM
	2325	TmpSector db 512 dup (?) ; Temporary Sector
[82]	2326	Scratch db 512 dup (?) ; Scratch buffer
[112]	2327	ALIGN 16
[30]	2328
[112]	2329
[51]	2330	; -----------------------------------------------------------------------------
	2331	; NEW PARTITION TABLE
	2332	; -----------------------------------------------------------------------------
[7]	2333	; Everything used to build a new IPT and reference it to the old one
[52]	2334	; BOOKMARK: New Partition Table
[46]	2335	NewPartTable db 1536 dup (?) ; New Partition Table
[112]	2336	ALIGN 16
[43]	2337
[51]	2338
	2339	; -----------------------------------------------------------------------------
	2340	; NEW HIDE PARTITION TABLE
	2341	; -----------------------------------------------------------------------------
[52]	2342	; BOOKMARK: New Hide-Partition Table
[51]	2343	NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
[112]	2344	ALIGN 16
[7]	2345
[51]	2346
	2347	; -----------------------------------------------------------------------------
	2348	; NEW DRIVE LETTERS
	2349	; -----------------------------------------------------------------------------
[52]	2350	; BOOKMARK: Logical Drive-Letters
[51]	2351	NewDriveLetters db LocIPT_MaxPartitions dup (?)
[112]	2352	ALIGN 16
[7]	2353
[51]	2354
	2355	; -----------------------------------------------------------------------------
	2356	; PARTITION SIZE TABLE
	2357	; -----------------------------------------------------------------------------
[46]	2358	; Size-Table (6 bytes per partition)
[52]	2359	; BOOKMARK: Partition Size Table
[51]	2360	PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
[112]	2361	ALIGN 16
[46]	2362
[51]	2363
	2364	; -----------------------------------------------------------------------------
	2365	; PARTITION POINTERS
	2366	; -----------------------------------------------------------------------------
[49]	2367	; Maximum is 52 word entries till now
[52]	2368	; BOOKMARK: Partition Pointers
[46]	2369	PartitionPointers dw 52 dup (?)
[112]	2370	ALIGN 16
[46]	2371
	2372	; Count of total Partition Pointers
	2373	PartitionPointerCount db ?
[112]	2374	ALIGN 16
[46]	2375
[112]	2376
[51]	2377	; -----------------------------------------------------------------------------
	2378	; XREF TABLE
	2379	; -----------------------------------------------------------------------------
[46]	2380	; X-Reference Table (holds new partnr, index is old part nr)
[52]	2381	; BOOKMARK: Xref Table
[51]	2382	PartitionXref db LocIPT_MaxPartitions dup (?)
[112]	2383	ALIGN 16
[46]	2384
[112]	2385
[51]	2386	; -----------------------------------------------------------------------------
	2387	; VOLUME LETTERS
	2388	; -----------------------------------------------------------------------------
[46]	2389	; Volume-Letters
	2390	; 0 - no LVM support
	2391	; 1 - LVM support, but no letter
	2392	; 'C'-'Z' - assigned drive letter
[52]	2393	; BOOKMARK: Volume Drive Letters
[51]	2394	PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
[112]	2395	ALIGN 16
[46]	2396
	2397
[51]	2398	; -----------------------------------------------------------------------------
	2399	; MISC VARS AND FLAGS
	2400	; -----------------------------------------------------------------------------
[52]	2401	; BOOKMARK: Misc Vars and Flags
[46]	2402	TotalHarddiscs db ? ; Total harddrives (by POST)
	2403	LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
	2404	NewPartitions db ? ; Freshly found partitions
[37]	2405	; Independent of SaveConfiguration
[46]	2406	TooManyPartitions db ? ; Non-zero if too many partitions found
[7]	2407
[46]	2408	VideoIO_Segment dw ? ; Segment for Video I/O
[7]	2409
[46]	2410	ExtendedAbsPos dd ? ; Extended Partition Absolute Position
	2411	ExtendedAbsPosSet db ? ; If Absolute Position set
[7]	2412
[46]	2413	CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
	2414	CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
	2415	; (filled out by PreCrap)
	2416	CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
[37]	2417	; (for detailed error message)
[112]	2418	ALIGN 16
[7]	2419
	2420
[51]	2421	; -----------------------------------------------------------------------------
	2422	; MENU RELATED VARS
	2423	; -----------------------------------------------------------------------------
[46]	2424	Menu_EntrySelected db ? ; Which partition we boot this time...
	2425	Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
	2426	Menu_AbsoluteX db ? ; Pos where Menu stuff starts
	2427	Menu_TotalParts db ? ; Copy of CFG_BootParts
	2428	Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
	2429	Menu_EntryDefault db ? ; Default Entry in filtered View
	2430	Menu_EntryLast db ? ; LastBooted Entry in filtered View
	2431	Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
[7]	2432	; - All adjusted to menu locations
[112]	2433	ALIGN 16
[7]	2434
[112]	2435
[51]	2436	; -----------------------------------------------------------------------------
	2437	; PARTITION RELATED VARS
	2438	; -----------------------------------------------------------------------------
[46]	2439	PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
	2440	PartSetup_ActivePart db ? ; Active Partition
	2441	PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
	2442	PartSetup_HiddenX db ? ; Pos for Hidden-Setup
	2443	PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
[112]	2444	ALIGN 16
[7]	2445
[112]	2446
[51]	2447	; -----------------------------------------------------------------------------
	2448	; TIMER / SETUP RELATED VARS
	2449	; -----------------------------------------------------------------------------
[46]	2450	TimedBootEnable db ? ; Local Enable/Disable for timed boot
	2451	TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
	2452	TimedSecondLeft db ? ; How many seconds are left till boom ?
	2453	TimedSecondBack db ? ; To get a modification noticed
	2454	TimedBootUsed db ? ; Timed Boot used for bootup ?
	2455	FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
	2456	SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
	2457	SETUP_ExitEvent db ? ; Exit Event to end SETUP
	2458	TempPasswordEntry db 17 dup (?)
	2459	SETUP_OldPwd db 17 dup (?)
	2460	SETUP_NewPwd db 17 dup (?)
	2461	SETUP_VerifyPwd db 17 dup (?)
	2462	StartSoundPlayed db ?
	2463	ChangePartNameSave db ? ; Save label after user-edit ?
	2464	SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
[112]	2465	ALIGN 16
[7]	2466
[51]	2467
	2468	; -----------------------------------------------------------------------------
	2469	; FX RELATED VARS
	2470	; -----------------------------------------------------------------------------
[37]	2471	FX_UseCount dw ?
	2472	FX_OverallTimer dw ?
	2473	FX_WideScrollerTimer dw ?
	2474	FX_WideScrollerCurPos dw ?
	2475	FX_WideScrollerSpeed db ?
	2476	FX_WideScrollerSpeedState db ?
	2477	FX_WideScrollerDirection db ?
	2478	FX_WideScrollerAbsDirection db ?
	2479	FX_WideScrollerBounceSpeed db ?
	2480	FX_CooperBarsTimer dw ?
[112]	2481	ALIGN 16
[7]	2482
[51]	2483	; Dynamically Generated Tables - do not need to get initialized with NUL
	2484	FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
	2485	FX_CooperState db 7 dup (?)
	2486	FX_SinusPos db 7 dup (?)
	2487	FX_CooperPos dw 7 dup (?)
[112]	2488	ALIGN 16
[51]	2489
	2490
	2491	; -----------------------------------------------------------------------------
	2492	; CHARSET BUFFER
	2493	; -----------------------------------------------------------------------------
	2494	CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
[112]	2495	ALIGN 16
[51]	2496
[112]	2497
[51]	2498	; -----------------------------------------------------------------------------
	2499	; LVM CRC TABLE
	2500	; -----------------------------------------------------------------------------
	2501	LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
[112]	2502	ALIGN 16
[51]	2503
[7]	2504
[51]	2505	; -----------------------------------------------------------------------------
[138]	2506	; LVM DRIVE-LETTER MAP
[51]	2507	; -----------------------------------------------------------------------------
[138]	2508	; Get's initialized at startup to: 00000011111111111111111111111100b
	2509	; Meaning A,B not free; C-Z free, rest unused. (right to left)
	2510	; Each partition with an assigned drive-letter clears a bit in this map.
	2511	FreeDriveletterMap dd ?
[112]	2512	ALIGN 16
[30]	2513
[51]	2514
	2515	; -----------------------------------------------------------------------------
[138]	2516	; OS/2 PHASE1 RELATED
[51]	2517	; -----------------------------------------------------------------------------
[138]	2518	Phase1Active db ?
	2519	OldPartitionCount db ?
[112]	2520	ALIGN 16
[30]	2521
	2522
[138]	2523	; -----------------------------------------------------------------------------
	2524	; ARRAY OF DISK INFORMATION STRUCTURES
	2525	; -----------------------------------------------------------------------------
[128]	2526	; Array of DISKINFO structures
	2527	DiskInformation db MaxDisks dup(DISKINFO_Size dup(?))
	2528	ALIGN 16
[51]	2529
[138]	2530
[51]	2531	; -----------------------------------------------------------------------------
[105]	2532	; INT13X DAP
[51]	2533	; -----------------------------------------------------------------------------
[105]	2534	; Disk Address Package that holds information for LBA-access using INT13X
	2535	INT13X_DAP db ? ; Size of paket, inserted by code
	2536	db ? ; Reserved
	2537	INT13X_DAP_NumBlocks dw ? ; Number of blocks
	2538	INT13X_DAP_Transfer dd ? ; Transfer Adress
	2539	INT13X_DAP_Absolute dd ? ; Absolute Sector
	2540	dd ? ; Second Part of QWORD
	2541	INT13X_DAP_Size = $-offset [INT13X_DAP] ; Calculated size
[112]	2542	ALIGN 16
[105]	2543
[30]	2544
[138]	2545	; -----------------------------------------------------------------------------
	2546	; DEBUG
	2547	; -----------------------------------------------------------------------------
	2548	; Some debug area.
	2549	dbg_scratch db 512 dup(?)
	2550	ALIGN 16
[30]	2551
[46]	2552
[51]	2553	; End of transient variables.
	2554	EndOfVariables:
[112]	2555	EndOfVariablesAbs = offset EndOfVariables + image_size
[51]	2556
	2557
	2558
	2559	; -----------------------------------------------------------------------------
	2560	; OLD AND NEW STACKS
	2561	; -----------------------------------------------------------------------------
[52]	2562	; BOOKMARK: Storage for Old and New Stack Pointers
[51]	2563	;
	2564	; These need to be outside the variable section because AiR-BOOT can restart
	2565	; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
	2566	; they would be cleared on AiR-BOOT restart.
	2567	;
	2568
	2569	; The variable section is cleared word-wise, so it could clear one byte extra
	2570	; depending on the alignment and size. This DD prevents the OldSP and OldSS
	2571	; to be partly overwritten by the clearing routine.
	2572	dd ?
[112]	2573	ALIGN 16
[51]	2574
	2575	; SS:SP from before our relocation.
	2576	; The registers values when the BIOS transferred control to us were pushed
	2577	; on this stack.
	2578
	2579	OldSP dw ?
	2580	OldSS dw ?
	2581
	2582	; SS:SP currently in use.
	2583	; They are temporarily dumped here so we can pop the resgisters from
	2584	; the old stack to display them in debug mode.
	2585	CurrentSP dw ?
	2586	CurrentSS dw ?
[112]	2587	ALIGN 16
[132]	2588
	2589	; Usually, commits are buildable and some minor checking has been done that
	2590	; whole disks do not get wiped. However, there are situations where stuff is
	2591	; in such a flux that it would be better to do non-buildable commits.
	2592	; That makes it possible to record the changes piecemeal without the danger of
	2593	; accidently using the resulting loader. Of course everyone is clever enough
	2594	; to _never_ build commits marked as 'testing' and install the result in
	2595	; environments where wiping all attached disks and sticks would be a problem...
[172]	2596	;~ force_build_error dd 0f000h dup(?)
[132]	2597
[51]	2598	;
	2599	; End of BSS segment.
	2600	;
[30]	2601	eobss:
[112]	2602	eobss_abs = offset eobss + image_size
[51]	2603	;
[97]	2604	; Total RAM occupied, including BSS.
	2605	; BASE is 8000:0000, LIMIT is 8000:FFFF.
	2606	; Note that the LDRIMAGE is of constant size, 7C00h = 62 sectors of 512 bytes.
	2607	;
[112]	2608	resident_size = offset eobss + image_size
[97]	2609
	2610	;
[51]	2611	; Close BSS segment.
	2612	;
[37]	2613	IFDEF SEGMENTED
[46]	2614	VOLATILE ENDS
[37]	2615	ELSE
[46]	2616	LDRIMAGE ENDS
[37]	2617	ENDIF
[43]	2618
[52]	2619	; BOOKMARK: End of Module
[45]	2620	END AiR_BOOT
[30]	2621

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source: trunk/bootcode/airboot.asm@ 185

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