source: trunk/bootcode/airboot.asm@ 111

Last change on this file since 111 was 109, checked in by Ben Rietbroek, 8 years ago

Mark 'AiR_BOOT_Start' (debugging) [v1.1.1-testing]

CAUTION:
This is a testbuild !
AirBoot uses the BIOS to access disks and a small coding error can trash
partition tables or other vital disk structures. You are advised to make
backups of TRACK0 and EBRs before using this testbuild. More info at:
​https://rousseaux.github.io/netlabs.air-boot/pdf/AirBoot-v1.1.0-manual.pdf
File size: 94.0 KB
RevLine 
[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]36include ../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]42include 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]48include ../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]60IFDEF TASM
61 ;~ JUMPS
62ENDIF
[30]63
[51]64
[30]65;
66; If defined then each module is prefixed with it's name.
[51]67; This is used for debugging purposes but it also increases code space.
[30]68; It should be off in release code.
69;
[51]70;~ MODULE_NAMES EQU
[30]71
72
73
[51]74; -----------------------------------------------------------------------------
75; DEBUG
76; -----------------------------------------------------------------------------
[30]77
[31]78;
[51]79; Enable this to include Debug Modules and enable COM-port debugging.
80; To have room for the debug-code, the FX-code can only be enabled
81; when AUX_DEBUG is not defined.
[45]82;
[71]83AUX_DEBUG EQU
[45]84
[51]85;
86; To have FX enabled, make sure FX_ENABLE is defined.
87; There is no need (for now) to remove Cooper Bars from the setup-menu
88; because AiR-BOOT does not crash when enabling Cooper Bars while FX
89; is not compiled in. Only TAB to post-screen does not work.
90; Way to go Martin !
91;
92IFNDEF AUX_DEBUG
93FX_ENABLED EQU
94ENDIF
[45]95
96
97
[51]98; -----------------------------------------------------------------------------
99; AUX
100; -----------------------------------------------------------------------------
[45]101;
[31]102; bits 7-5 = datarate
103; (000=110,001=150,010=300,011=600,100=1200,101=2400,110=4800,111=9600 bps)
104; bits 4-3 = parity
105; (00 or 10 = none, 01 = odd, 11 = even)
106; bit 2 = stop-bits
107; (set = 2 stop-bits, clear = 1 stop-bit)
108; bits 1-0 = data-bits
109; (00 = 5, 01 = 6, 10 = 7, 11 = 8)
110;
[30]111
[31]112; 9600 bps, no parity, 1 stop-bit, 8 bits per char
[43]113AUX_INIT_PARMS EQU 11100011b
[31]114
[43]115; Com-port for debugging, 0 is disabled
116BIOS_COM_PORT EQU 1
117
[31]118; Default word value for BIOS_AuxParms variable
119; Note that is has moved since v1.07
[43]120BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
[31]121
[78]122; Default byte value for BIOS_BootDisk variable
[77]123BIOS_BOOTDISK_DEFAULT EQU 80h
[43]124
125
126
[51]127; -----------------------------------------------------------------------------
128; LABELS
129; -----------------------------------------------------------------------------
130; Address labels after code-move
[76]131BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
132BootBasePtr equ 0h ; We put our MBR to this location
[51]133BootBaseExec equ BootBasePtr+offset MBR_RealStart
[76]134StackSeg equ 07000h ; Put the stack below the code
135StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
136StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
[7]137
138
[30]139
[51]140; -----------------------------------------------------------------------------
141; VIDEO
142; -----------------------------------------------------------------------------
[30]143; Video pages, no INT 10h is used for menu-drawing etc.
[7]144VideoIO_Page0 equ 0B800h
145VideoIO_Page1 equ 0B900h
146VideoIO_Page2 equ 0BA00h
147VideoIO_Page4 equ 0BC00h
148VideoIO_FXSegment equ 0A000h
149
[30]150; Special line-drawing characters
[69]151TextChar_WinLineRight equ 0C4h
152TextChar_WinLineDown equ 0B3h
153TextChar_WinRep1 equ 0D1h
154TextChar_WinRep2 equ 0C5h
155TextChar_WinRep3 equ 0CFh
156TextChar_WinRep4 equ 0B5h
157TextChar_WinRep5 equ 0C6h
158TextChar_WinRep6 equ 0D8h
[7]159
[51]160
161
162; -----------------------------------------------------------------------------
163; PARTITION TABLE
164; -----------------------------------------------------------------------------
165; Offsets for Partition-Entries in MBR/EBRs
[37]166LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
167LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
[51]168LocBRPT_BeginCHS equ 1 ; Packed CHS value
169LocBRPT_BeginHead equ 1 ; Start head, usually < 16
170LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
171LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
[37]172LocBRPT_SystemID equ 4 ; Type of system using the partition
[51]173LocBRPT_EndCHS equ 5 ; Packed CHS value
174LocBRPT_EndHead equ 5 ; End head, usually < 16
175LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
176LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
177LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
178LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
[7]179
[51]180; Signature relative to start of MBR/EBR
181LocBR_Magic equ 510 ; Offset of 0AA55h signature
[7]182
[51]183; -----------------------------------------------------------------------------
184; LVM RECORD
185; -----------------------------------------------------------------------------
[34]186; Used as a quick compare in LVM.ASM
[37]187LocLVM_SignatureByte0 equ 02h
[30]188
[34]189; Offsets for LVM Information Sector.
190; These are relative to the start of the LVM sector.
[37]191LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
192LocLVM_CRC equ 08h ; CRC is a DWORD
193LocLVM_Heads equ 1ch ; Number of heads
194LocLVM_Secs equ 20h ; Sectors per Track
195LocLVM_DiskName equ 24h ; Name of the disk
196LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
197LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
[30]198
[34]199; An LVM info-sector can contain information on max. 4 partitions.
200; All 4 entries will be used when there 4 primary partitions defined.
201; For logical partitions, the LVM info-sector is located below the start
202; of the logical partition and only one LVM entry is used in that logical
203; LVM info-sector.
[37]204LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
[30]205
[51]206
207; -----------------------------------------------------------------------------
208; LVM ENTRY
209; -----------------------------------------------------------------------------
[34]210; Offsets for LVM entry.
211; These are relative to the start of the entry.
[51]212LocLVM_VolumeID equ 00h ; DWORD
213LocLVM_PartitionID equ 04h ; DWORD
214LocLVM_PartitionSize equ 08h ; DWORD
215LocLVM_PartitionStart equ 0ch ; DWORD
[37]216LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
217LocLVM_Startable equ 11h ; is Startable (newly installed system)
[51]218LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
219LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
220LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
[37]221
[71]222; Truncated to 11 chars when displayed in menu.
[34]223; MiniLVM sets both to the same value.
224; Also, MiniLVM uses a 0-byte terminator, so the maximum length is 19d.
225; Same goes for LocLVM_DiskName.
[45]226; These offsets are relative to an LVM entry.
[37]227LocLVM_VolumeName equ 14h ; 20 bytes
228LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
[30]229
[45]230; LVM constants.
[51]231LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
232LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
233LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
234LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
[30]235
[34]236
[51]237; -----------------------------------------------------------------------------
238; AiR-BOOT IPT
239; -----------------------------------------------------------------------------
[7]240; Offsets for IPT (Internal Partition Table)
[51]241LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
[37]242LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
243LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
244LocIPT_Serial equ 0 ; Serial from MBR ?
245LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
246LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
247LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
[51]248LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
[37]249LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
250LocIPT_LocationBegin equ 20 ; Begin of Partition
251LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
252LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
253LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
[7]254
[38]255
[30]256; AiR-BOOT IPT-Flags
[37]257LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
[51]258LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
[7]259
[37]260Flags_Bootable equ 00000001b
261Flags_VIBR_Detection equ 00000010b
262Flags_HideFeature equ 00000100b
263Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
[46]264Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
[37]265Flags_NoPartName equ 01000000b
266Flags_NowFound equ 10000000b ; temp only in OldPartTable
267Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
[7]268
[37]269FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
270FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
271FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
272FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
[7]273
[51]274
275; -----------------------------------------------------------------------------
276; AiR-BOOT HPT
277; -----------------------------------------------------------------------------
278; Hidden Partition Table
279; Length of an HPT-entry ((45 * 6 bits-per-part) / 8) * 45
280; 33.75 = 34 bytes for HPT-entry, coincidently same as length of IPT-entry.
281; Packed table !
282LocHPT_LenOfHPT equ 34
283
284
285; -----------------------------------------------------------------------------
286; NAVIGATION KEYS
287; -----------------------------------------------------------------------------
[30]288; Navigation keys
[37]289Keys_Up equ 48h
290Keys_Down equ 50h
291Keys_Left equ 4Bh
292Keys_Right equ 4Dh
293Keys_PageUp equ 49h
294Keys_PageDown equ 51h
295Keys_GrayPlus equ 4Eh
296Keys_GrayMinus equ 4Ah
297Keys_Plus equ 1Bh
298Keys_Minus equ 35h
299Keys_ENTER equ 1Ch
300Keys_ESC equ 1h
301Keys_F1 equ 3Bh
302Keys_F10 equ 44h
[51]303Keys_C equ 2Eh ; Add. Check for Ctrl!
[37]304Keys_Y equ 2Ch
305Keys_Z equ 15h
306Keys_N equ 31h
307Keys_TAB equ 0Fh
308Keys_Delete equ 53h
309Keys_Backspace equ 0Eh
310Keys_Space equ 20h
[7]311
[37]312Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
[7]313
314
[51]315; -----------------------------------------------------------------------------
316; MISC
317; -----------------------------------------------------------------------------
318; Initial value for the FreeDriveletterMap
319; Meaning A,B not free; C-Z free, rest unused. (right to left)
320; Each partition with an assigned drive-letter clears a bit in this map.
321; (Not implemented yet)
322InitialFreeDriveletterMap equ 00000011111111111111111111111100b
[46]323
[51]324;
325; The first harddisk is BIOS coded 80h.
326; This makes a total of 128 disks that could be supported using this coding.
327; This value is used to store disk-information and this info is allocated
328; in the BSS. 64 disks ought to be enough for everybody :-)
329;
330MaxDisks equ 64
[46]331
332
333
[51]334
335
336
337;##############################################################################
[46]338; AiR-BOOT / MAIN-CODE
[51]339;##############################################################################
[46]340
[51]341;
[43]342; Because of the TASM-bug the processor had to be changed to turn JUMPS
343; off. Existing movzx instructions were replaced with 286 equivalent code.
344; Out of range relative jumps have been recoded.
[51]345;
346; Since version 1.0.8, JWasm is the preferred assembler and Tasm will be
347; dropped. Also, the chances of AiR-BOOT being used on a 286-machine are
348; very slim, so a future version will revert back to .386 and also incorporate
349; 32-bit code. This will enable some enhanced constructs such as scaled
350; indexing, bit-instructions, 32-bit registers and what not.
351;
[43]352.286
[30]353
[51]354;
355; For Tasm, MODEL is needed for the USES directive to work.
356; So always use a model when assembling with Tasm otherwise registers on
357; function calls that use USES are not saved and restored.
358; The model itself, has no real effect because we generate a binary image
359; and not a segmented executable.
360; For the other assemblers we define no model to get rid of the default C/C++
361; segments for future object-linked versions of AiR-BOOT.
362;
[43]363IFDEF TASM
[46]364 ;~ .model large, basic
[43]365 .model tiny,c
366ENDIF
[37]367
368;
[51]369; The below is used to switch between the original 1-segment (code_seg) layout
370; and the new 2-segment (code_seg and bss_data) layout.
371; It will be removed in future versions.
[37]372; The 2-segment layout was needed for JWasm because it does not treat
[51]373; db ? at the end of a code segment as bss-data.
[37]374; Therefore, a true BSS segment is now used.
[51]375; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
[37]376; segment.
377; Note that this influences the offsets in the BSS in the list-file and
378; the wdis disassembly file (.WDA).
379; They are now segment-relative. The true offset is resolved at link
380; time.
381;
[43]382SEGMENTED EQU
[37]383
[51]384 IFDEF SEGMENTED
385 AIRBOOT GROUP LDRIMAGE,VOLATILE
386 ENDIF
[37]387
[51]388 ; Our code-segment starts here.
389 LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
[7]390
[51]391 IFDEF SEGMENTED
392 ASSUME CS:AIRBOOT, DS:AIRBOOT, ES:nothing, SS:nothing
393 ELSE
394 ASSUME CS:LDRIMAGE,DS:LDRIMAGE,ES:nothing, SS:nothing
395 ENDIF
[30]396
[51]397
398
[31]399;==============================================================================
[51]400; Sector 1
401;==============================================================================
[30]402
[51]403;------------------------------------------------------------------------------
[46]404 ; We are not a .COM file at 100h but a BINARY image
405 ; of which only the 1st sector gets loaded at 0000:07c00h
406 ; by the BIOS. The code in this 1st sector is position
407 ; independent and moves itself to a new location at 8000:0000h.
408 ; Then it jumps to a new entry-point and loads the rest of
409 ; the image to the new location.
[51]410 org 00000h
411;------------------------------------------------------------------------------
[30]412
[46]413
414;
[51]415; Since AiR-BOOT is a boot-loader residing in track0, the first 512 bytes
416; have the layout of a Master Boot Record (MBR). When AiR-BOOT get's installed,
417; the first 512 bytes of this code get's merged with the Partition Table.
418; The rest is installed in the remaining sectors with sector 62 (LBA 61)
419; being the last sector used by AiR-BOOT. Sector 63 is reserved for IBM LVM.
420; The last sector used by AiR-BOOT is a copy of the MBR that AiR-BOOT makes
421; every time a system gets booted.
[46]422;
[30]423
[46]424;
[51]425; Due to the addition of an extra 'I13X' sugnature and code to preserve the
426; values of the registers on entry, the MBR-code has become a bit messy.
427; This will be cleaned-up in future versions.
428;
429
430;
[46]431; Martin had a short jump followed by the AiRBOOT signature at first.
432; Then he encountered strange behaviour by some M$ operating-systems
433; if the the first insruction was not a CLI.
[30]434; But there was no room to insert the CLI and of course he did not want to
[51]435; change the location of the AiR-BOOT signature.
[30]436; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
[51]437; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
[46]438;
[30]439
440
[51]441; -----------------------------------------------------------------------------
442; FIRST ENTRY-POINT
443; -----------------------------------------------------------------------------
[52]444; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
[51]445; ######################################################
446; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
447; ######################################################
[37]448AiR_BOOT:
[51]449 ; Some M$ operating systems need a CLI
450 ; here otherwise they will go beserk
451 ; and will do funny things during
452 ; boot phase, it's laughable!
453 MBR_1stOpc: cli
[30]454
[51]455 ; JMP-Short -> MBR_Start
456 ; Uses the 'A' from the signature as the displacement !
457 MBR_JmpOpc db 0EBh
[7]458
[51]459 ; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
460 ;~ db 'AiRBOOT',24h,02h,20h,12h,01h,08h,TXT_LanguageID
461 MBR_ABSig: InsertAirbootSignature TXT_LanguageID
[37]462
[51]463 ; Total Code Sectors Count.
464 ; Actual value will be inserted by FIXCODE.
465 MBR_CodeSecs db 1
[37]466
[51]467 ; Total Code Sectors Count, dynamically calculated.
468 ;~ db (code_end-$)/512
[37]469
[51]470 ; Check-Sum for Code
471 MBR_CheckCode dw 0
[37]472
473
474
[51]475; -----------------------------------------------------------------------------
476; THIRD ENTRY-POINT
477; -----------------------------------------------------------------------------
[52]478; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
[30]479;
480; No single instruction below should be changed, added or removed in the code
481; below as this will cause the jump-link to go haywire.
[31]482;
[37]483MBR_Start:
[51]484 ;
485 ; When we arrive here, no registers have been used yet.
486 ; So, they still contain the values the BIOS left in them.
487 ; We want to preserve those value's for later inspection
488 ; by putting them on the stack.
489 ;
[30]490
[51]491 ; No space for this instruction here.
492 ; We'll enable interrupts later.
493 ;sti ; This opcode is dedicated to:
494 ; =MICROSOFT JUMP DEPARTMENT=
495
496 ; Push all registers with values provided by the BIOS
497 ; on the stack.
498 pusha
499
500 ;
[37]501 ; Setup some base stuff
502 ; AX got loaded wrongly for debug, changed the instructions
503 ; without modifying the number of bytes.
[51]504 ; Don't comment-out the redundant instruction below because it
[37]505 ; *will* change the number of bytes and break the jump-chain.
[51]506 ;
507
508 ; The segment we are moving ourself from (NOT USED)
509 ;mov ax, StartBaseSeg
[37]510 ;mov ds, ax
[51]511
512 ; Make sure DS points to CS.
[37]513 push cs
514 pop ds
[51]515
516 ; Setup the source and destination for the code move.
517 mov si, StartBasePtr ; The offset we move ourself from
518 mov ax, BootBaseSeg ; The target segment we move to
[37]519 mov es, ax
[51]520 ;mov di, BootBasePtr ; The target offset we move to
521 ; Changed the instruction to make room.
522 ; So, BootBasePtr is not used !
523 ; The offset in the target segment is assumed to be 0000
524 ; anyway.
525 xor di,di
526 ;sti
[30]527
[76]528 ; Size of the MBR in words.
[37]529 mov cx, 256 ; Pre-boot environment
[30]530
[37]531 ;
[51]532 ; This moves this 512-byte sector, loaded by the BIOS at
533 ; 0000:7c00 to 8000:0000.
[37]534 ;
[51]535 cld
[37]536 rep movsw
[30]537
[77]538 ; Temporary save SS and SP so we still have access to this
539 ; stack after we have setup our own.
540 mov cx,ss
541 mov bx,sp
542
[51]543 ; Code an intersegment jump to the new location.
544 ; jmp BootBaseSeg:BootBaseExec
545 ; Note that DX:BX containts the old SS:SP.
[37]546 db 0EAh
[46]547 dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
548 dw BootBaseSeg ; This is 08000h
[7]549
[30]550
[51]551
552
553; -----------------------------------------------------------------------------
554; SIMPLE MBR FUNCTIONS
555; -----------------------------------------------------------------------------
[30]556;
557; Some MBR-functions to provide absolute minimum functionality.
558;
559
560;
[52]561; BOOKMARK: Halt System
[30]562; Entry-point for halting the system.
563;
[7]564MBR_HaltSystem:
[37]565 mov ax, 8600h
566 xor cx, cx
567 mov dx, 500
[46]568 int 15h ; Wait to display the whole screen :]
569MBR_HaltSys:
[81]570 ;~ cli
[37]571 jmp MBR_HaltSys
[7]572
[31]573
[77]574 ; Base of some MBR variables
[45]575 ORIGIN 0003Ch
576
[77]577MBR_Variables:
578
[51]579; Comport settings.
580; It had to be moved to create room for the double I13X signature.
[37]581; It cannot be in the config-area (sector 55)
[43]582; because that area is crc-protected and would not allow 'poking'.
583BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
[31]584
[77]585; When the BIOS turns over control to the MBR, DL holds the BIOS disk-number
586; from which the boot was initiated. This would normally be 80h, corresponding
587; to the first physical disk. However, some modern BIOSses can directly boot
588; from other disks, so AirBoot cannot assume being loaded from 80h anymore.
589; So here we store the BIOS disk-number passed in DL when AirBoot got control.
590BIOS_BootDisk db BIOS_BOOTDISK_DEFAULT ; Get overwritten with 'DL'
[51]591
[77]592; Reserved space for future variables.
[51]593IFDEF AUX_DEBUG
[77]594reserved db 5 dup('X')
[51]595ELSE
[77]596reserved db 5 dup(0)
[51]597ENDIF
[30]598
[45]599
[51]600
601
602; -----------------------------------------------------------------------------
603; SECOND ENTRY-POINT
604; -----------------------------------------------------------------------------
[77]605
[37]606 ;
607 ; We arrive here after the first jump using the 'A' of the
[51]608 ; AiR-BOOT signature. So we ensure the jump is always at
609 ; this offset. We jump here, because Martin needed to
610 ; insert a CLI on start and did not want to change the
611 ; AiR-BOOT signature because of Microsoft inventions...
[45]612 ;
613 ORIGIN 00044h
[37]614
615 ; Jump again...
[51]616 ; This time to the code that relocates to 8000:0000.
[52]617 ; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
[37]618 jmp MBR_Start
619
[30]620;
621; Entry-point when loading fails.
622;
[37]623 db 'LOAD ERROR!', 0
624MBR_LoadError Proc Near
625 mov si, offset $-12
626 push cs
627 pop ds
628 call MBR_Teletype
629 MBRLE_Halt:
630 jmp MBRLE_Halt
631MBR_LoadError EndP
[7]632
[30]633;
634; Entry-point when saving fails.
635;
[37]636 db 'SAVE ERROR!', 0
637MBR_SaveError Proc Near
638 mov si, offset $-12
639 push cs
640 pop ds
641 call MBR_Teletype
642 MBRSE_Halt:
643 jmp MBRSE_Halt
644MBR_SaveError EndP
[7]645
[30]646
647; Put text on the screen using the BIOS tele-type function.
648; No attributes like color are supported.
[7]649; In: SI - Pointer to begin of string (EOS is 0)
650; Destroyed: SI
[37]651MBR_Teletype Proc Near Uses ax bx cx
652 mov ah, 0Eh
653 mov bx, 7
654 MBRT_Loop:
655 lodsb
656 or al, al
657 jz MBRT_End
658 int 10h
659 jmp MBRT_Loop
660 MBRT_End:
661 ret
662MBR_Teletype EndP
[7]663
[30]664;
665; Rousseau: DO NOT ADD CODE TO THIS SECTION !
666;
667
[52]668; In: BX - Base Check
669; DS:SI - Pointer to 512-byte-area to be included
670; Out: BX - Base Check Result
[7]671; Destroyed: SI will get updated (+512)
[37]672MBR_GetCheckOfSector Proc Near Uses ax cx
673 mov cx, 256
674 MBRGCOS_Loop:
675 lodsw
676 xor ax, 0BABEh
677 xor bx, ax
678 loop MBRGCOS_Loop
679 or bx, bx
680 jnz MBRGCOS_NoFixUp
681 mov bx, 1 ; dont allow 0, cause 0 == empty
682 MBRGCOS_NoFixUp:
683 ret
684MBR_GetCheckOfSector EndP
[7]685
[30]686
687
688
689
690
[51]691; -----------------------------------------------------------------------------
692; ENTRY-POINT OF MOVED CODE
693; -----------------------------------------------------------------------------
694
[30]695;
[51]696; When we arrive here we are running at 8000:0000.
[77]697; CX:BX contains the SS:SP of the old stack.
[30]698;
699
[51]700;
701; This is where the rest of AiR-BOOT gets loaded from track0.
702;
[52]703; BOOKMARK: Running at relocated position (Load additional sectors)
[31]704;------------------------------------------------------------------------------
[7]705MBR_RealStart:
[51]706 ;
707 ; Setup new stack and other segment registers.
708 ;
[37]709 mov ax, StackSeg ; 07000h, below the moved code
710 mov ss, ax
711 mov sp, 7FFEh ; Even is better
[51]712 push es ; ES holds segment where we moved to
[52]713 pop ds ; Set DS=ES to Code Segment
[30]714
[51]715 ;
[77]716 ; Push the old SS:SP which was saved in CX:BX on the new stack.
[51]717 ;
[77]718 push cx ; Old SS
[51]719 push bx ; Old SP
[43]720
[77]721 ;
722 ; Store the BIOS disk-number AirBoot was loaded from.
723 ;
724 mov [BIOS_BootDisk], dl
[51]725
[37]726 ; Load the configuration-sectors from disk.
[51]727 ; These are the main configuration sector and the various
728 ; tables that follow it upto but not including the MBR backup.
[77]729 mov bx, offset Configuration ; Location in RAM
730 mov cx, 0037h ; Config sector is at 55d
731 mov al, (MBR_BackUpMBR - Configuration) / 200h
732 mov ah, 02h
733 ; DL is already loaded with BIOS disk-number
734 int 13h ; Call BIOS service
[37]735 jnc MBR_ConfigCopy_NoError
[30]736
[37]737 ; Some error occured
738 MBR_ConfigCopy_LoadError:
[77]739 jmp MBR_LoadError ; Will Abort BootUp
[30]740
[77]741 ; Load the code-sectors from disk.
742 ; [MBR_CodeSecs] is filled in by the FIXCODE helper that post
743 ; processes the AIRBOOT loader image after it has been built.
[37]744 MBR_ConfigCopy_NoError:
[77]745 mov bx, offset FurtherMoreLoad ; Directly after MBR
746 mov cx, 0002h ; Start at 2nd sector
747 mov al, [MBR_CodeSecs] ; Number of code sectors
748 mov ah, 02h ; Read sectors
749 ; DL is already loaded with BIOS disk-number
750 int 13h ; Call BIOS service
[37]751 jnc MBR_RealStart_NoError
[31]752
[77]753 ; Some error occured
754 jmp MBR_LoadError ; Will Abort BootUp
[31]755
[77]756
757 ; I13X Signatures
758 ORIGIN 000d0h
759
[37]760 ; [v1.05+]
761 ; Signature for IBM's LVM to detect our "powerful" features ;)
[45]762 ;
[37]763 ; [v1.0.8+]
764 ; Reworked MBR code to be able to create a
765 ; double 'I13X' signature.
766 ; MBR's created with LVM eCS v1.x have the signature at 0d5h
767 ; MBR's created with LVM eCS v2.x have the signature at 0d0h
768 ; See eCS bugtracker issue #3002
[45]769 ;
[37]770 ; Update: These are actually MOV EAX,'X31I' instructions
771 ; in the eCS LVM MBR-code. They are at different places in
[51]772 ; the v1.x and v2.x LVM MBR-code. Other code might depend on
773 ; their presence. Let's protect their location.
[37]774 db 'I13X',0,'I13X',0
[31]775
[30]776
[37]777 MBR_RealStart_NoError:
778 ; Now Check Code with CheckSum
779 mov si, offset FurtherMoreLoad
[30]780
[37]781 ;movzx cx, bptr ds:[10h]
782 mov cl, ds:[10h]
783 mov ch,0
[31]784
[51]785 ; Claculate checksum
[37]786 xor bx, bx
787 MBR_RealStart_CheckCodeLoop:
788 call MBR_GetCheckOfSector
789 loop MBR_RealStart_CheckCodeLoop
[31]790
[72]791 ; Verify checksum
[37]792 cmp MBR_CheckCode, bx
[72]793 ;~ je MBR_RealStart_CheckSuccess ; CRC verified
794 jmp MBR_RealStart_CheckSuccess ; Ignore CRC
[7]795
[72]796 ; Oops, checksum mismatch -- halt the system
[37]797 mov si, offset TXT_ERROR_Attention
798 call MBR_Teletype
799 mov si, offset TXT_ERROR_CheckCode
800 call MBR_Teletype
801 mov si, offset TXT_ERROR_CheckFailed
802 call MBR_Teletype
803 jmp MBR_HaltSystem
[51]804
805
806 ;
807 ; OK, all loading went fine so the rest of the code
808 ; is present now, so we jump to it.
809 ; The old SS:SP is still on the stack.
810 ;
[37]811 MBR_RealStart_CheckSuccess:
812 jmp AiR_BOOT_Start
[30]813
814
815
816
[37]817
[31]818;------------------------------------------------------------------------------
[60]819include text/txtmbr.asm ; All translateable Text in MBR
[31]820;------------------------------------------------------------------------------
[30]821
[77]822 ; Disk Signature
823 ORIGIN 001B8h
[30]824
825
[37]826 ; Disk Signature
827 ; Note that in an LVM 2.x MBR this collides
828 ; with the dummy PTE that it uses to look for IBM-BM
829 ; on the second harddisk.
[52]830 ; AiR-BOOT installer will merge the field
831 ; from the MBR it replaces.
[51]832 MBR_DrvSig db 'DSIG'
[31]833
[45]834 ; Unused word at 01BCh.
835 ; An LVM 2.x MBR puts 0CC33h here.
[52]836 ; AiR-BOOT installer will merge the field
837 ; from the MBR it replaces.
[51]838 MBR_Spare dw '$$'
[35]839
840
[45]841 ; Partition Table.
842 ORIGIN 001BEh
[43]843
[45]844 ; The 4 entries just for show.
[52]845 ; AiR-BOOT installer will merge them from the MBR it replaces.
[51]846 MBR_PartTable:
[37]847 db 16 dup('0')
848 db 16 dup('1')
849 db 16 dup('2')
850 db 16 dup('3')
851
852 ; Boot Sigbature
[51]853 MBR_Sig dw 0aa55h
[37]854
[30]855
856
857
[37]858
[45]859
[51]860
[31]861;==============================================================================
[51]862; Sector 2
863;==============================================================================
[30]864
[51]865; -----------------------------------------------------------------------------
866; FILE-SYSTEM TABLES
867; -----------------------------------------------------------------------------
868
[77]869 ; First sector the rest of the loader image
[45]870 ORIGIN 00200h
[30]871
[31]872;
873; Everything beyond this point is loaded on startup
874; and is NOT existant at first
875;
[7]876FurtherMoreLoad:
[30]877
878;
879; Filesystem table correlating id with name.
880;
881
[37]882 ; first Normal-Partition-ID, Hidden-Partition-ID
[51]883 ; and Default-Partition-Flags.
[37]884 ; 01h -> Boot-Able
885 ; 10h -> FAT32 - Name Getting Scheme
886 ; 20h -> No Name To Get (use Partition Name from IPT)
887 ; 40h -> 'L' flag possible
[7]888 db 'AiRSYS-TABLE'
[37]889FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
[29]890 db 07h, 17h,41h, 08h,017h,21h, 35h,035h,20h,0FCh,017h,41h
891 db 09h, 19h,11h, 0Bh,01Bh,11h, 0Ch,01Ch,11h,0EBh,0EBh,01h
[7]892 db 63h, 63h,21h, 81h,081h,21h, 83h,083h,21h, 40h,040h,21h
893 db 0A5h,0A5h,21h,0A6h,0A6h,21h, 82h,082h,20h,0A7h,0A7h,21h
894 db 63h, 63h,21h, 4Dh,04Dh,21h, 4Eh,04Eh,21h, 4Fh,04Fh,21h
895 db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
896 db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
897 db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
898 db 01h, 01h,01h,0FDh,0FDh,20h, 84h,084h,20h,0A0h,0A0h,20h
899 db 0Ah, 0Ah,20h,0FEh,0FEh,21h,0FFh,0FFh,21h, 00h,000h,21h
900 db 16 dup (0)
901
[46]902FileSysNames db 'FAT12 ', 'FAT16 ', 'FAT16Big', 'FAT16Big'
903 db 'HPFS ', 'NTFS ', 'LVM-Data', 'JFS '
904 db 'FAT32 ', 'FAT32 ', 'FAT32 ', 'BeOS '
905 db 'Unix ', 'Minix ', 'Linux ', 'Venix ' ; x row ;)
906 db 'BSD/386 ', 'OpenBSD ', 'LinuxSwp', 'NeXTSTEP'
907 db 'GNU HURD', 'QNX ', 'QNX ', 'QNX '
908 db ' ', ' ', ' ', ' '
909 db ' ', ' ', ' ', ' '
910 db ' ', ' ', ' ', ' '
911 db ' ', 'Kernel ', ' ', '0V-Award'
912; db 'OS/2 Man', 'via BIOS', 'Floppy ', 'Unknown '
913 db 'OS2-BMGR', 'via BIOS', 'Floppy ', 'Unknown '
[7]914 ; -> 44 Partition-Types
915
[30]916
917
918
[37]919
920
[51]921;==============================================================================
922; Sector 3
923;==============================================================================
[30]924
[51]925; -----------------------------------------------------------------------------
926; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
927; -----------------------------------------------------------------------------
[30]928
[77]929 ; The entry-point jumped to from the MBR code
[51]930 ORIGIN 00400h
[30]931
[43]932
[77]933;##############################################################################
934;# AiR_BOOT_Start :: This is where the real work begins #
935;# -------------------------------------------------------------------------- #
936;# At this point, all of AirBoot is loaded, including its configuration. #
937;# First, some setup is done, which includes the initialization of variables #
938;# in the BSS. After that, disks are scanned for partitions and the required #
939;# house keeping is done to incorporate changes from the previous boot. Then #
940;# the partition list is prepared and the menu is presented. #
941;##############################################################################
[52]942; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
[36]943AiR_BOOT_Start:
[30]944
[36]945
[51]946 ;
947 ; Enable interrupts.
948 ;
949 sti
[36]950
951 ;
[51]952 ; Pop the old SS:SP from the stack and save it in the BSS.
[52]953 ; Note that this is outside the normal variable area that gets cleared.
954 ; This allows AiR-BOOT to restart itself when debugging and come-up
955 ; with access to the original values of registers the BIOS passed.
[51]956 ;
957 pop [OldSP]
958 pop [OldSS]
959
960
[77]961 ; Verify we still got the BIOS disk in DL
962 IFDEF AUX_DEBUG
[109]963 IF 1
964 pusha
965 push si
966 mov si, offset $+5
967 jmp @F
968 db 10,'## AiR_BOOT_Start ##',10,0
969 @@:
970 call AuxIO_Print
971 pop si
972 call DEBUG_DumpRegisters
973 popa
974 ENDIF
[77]975 ENDIF
976
[51]977; -----------------------------------------------------------------------------
978; IBM-BM BOOT PREPARATION
979; -----------------------------------------------------------------------------
980 ;
[36]981 ; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
982 ; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
983 ; signature is required at 3000:0000, FS needs to contain 3000h
984 ; and the 32-bit LBA address needs to follow the 'I13X' signature.
985 ; For booting IBM-BM from the second disk, a copy of the MBR of the
986 ; first disk is also required at 0000:7E00.
987 ; This information is derived from the eCS 2.x LVM MBR.
988 ;
989 ; So, now is a good time to copy the MBR of the first disk to
990 ; 0000:7E00 in case the partition that will be started is IBM-BM.
991 ; This copy is located at 8000:0000 and DS already points to this
[51]992 ; segment. The 'I13X' signature and FS will be setup later.
[36]993 ;
[37]994 pusha ; Save all the general purpose regs
995 push es ; We need ES too, so save its value
996 xor ax,ax ; Segment 0000h
997 mov es,ax ; Make ES point to it
998 mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
999 mov di,7e00h ; Destination for the MBR for IBM-BM
1000 mov cx,100h ; 256 words = 512 bytes
1001 cld ; Direction from low to high
1002 rep movsw ; Copy the 256 words of the MBR
1003 pop es ; Restore previous value of ES
1004 popa ; Restore all the general purpose regs
[36]1005
1006
[51]1007; -----------------------------------------------------------------------------
1008; PRECRAP
1009; -----------------------------------------------------------------------------
[36]1010
[51]1011 ;
1012 ; First it clears the BSS area.
[52]1013 ; Note that the old SS:SP is stored outside this area so this
[51]1014 ; does not get lost.
1015 ; Then initialize various runtime variables and structures.
1016 ;
[52]1017 ; BOOKMARK: Pre Crap
[51]1018 call PRECRAP_Main
1019 ; Number of harddisks and other system-info is now known.
[43]1020
[51]1021 ;!
1022 ;! DEBUG_BLOCK
1023 ;! Let's see what the BIOS supplied us with...
1024 ;! Uncomment below to activate.
1025 ;!
[109]1026 ;~ __DUMP_BIOS_REGS__ EQU
[51]1027 IFDEF AUX_DEBUG
1028 IFDEF __DUMP_BIOS_REGS__
1029 pushf
1030 pusha
1031 ; Print title.
1032 mov si,offset [bios_reg]
1033 call AuxIO_Print
1034 ; Save the current stack (SS:SP).
1035 mov ax,ss
1036 mov [CurrentSS],ax
1037 mov [CurrentSP],sp
[45]1038
[51]1039 ; Restore the old stack.
1040 mov ss,[OldSS]
1041 mov sp,[OldSP]
[30]1042
[51]1043 ; Pop the registers with the BIOS values.
1044 popa
1045 ; Push them back for AiR-BOOT restart (debug mode).
1046 pusha
1047 ; Dump them to the serial-port.
1048 call DEBUG_DumpRegisters
1049 ; Restore the current stack.
1050 mov ax,[CurrentSS]
1051 mov ss,ax
1052 mov sp,[CurrentSP]
[30]1053
[51]1054 ; Restore registers.
1055 popa
1056 popf
1057 ENDIF
1058 ENDIF
[30]1059
1060
[51]1061 ;!
1062 ;! DEBUG_BLOCK
1063 ;! Dump the registers at this point.
1064 ;! Uncomment below to activate.
1065 ;!
1066 IFDEF AUX_DEBUG
1067 ;~ call DEBUG_DumpRegisters
1068 ; Dump drive-letters of dl-feature before partitions are
1069 ; scanned and processed.
[109]1070 ;~ call DEBUG_DumpDriveLetters
1071 ;~ call DEBUG_DumpVolumeLetters
1072 ;~ call DEBUG_DumpPartitionXref
[51]1073 ENDIF
1074
1075; -----------------------------------------------------------------------------
1076; PARTITION SCAN
1077; -----------------------------------------------------------------------------
[77]1078
1079
1080
1081
1082
1083
[51]1084 ;
[52]1085 ; BOOKMARK: Scan all partitions
[51]1086 ;
1087 call PARTSCAN_ScanForPartitions
1088 ; Internal Partition Table is now populated.
1089
1090 ;!
1091 ;! DEBUG_BLOCK
1092 ;! Dump various tables.
1093 ;! Uncomment below to activate.
1094 ;!
1095 IFDEF AUX_DEBUG
[50]1096 ;~ call DEBUG_DumpIPT
[49]1097 ;~ call DEBUG_DumpPartitionPointers
1098 ;~ call DEBUG_DumpNewPartTable
[50]1099 ;~ call DEBUG_DumpDriveLetters
[109]1100 ;~ call DEBUG_DumpDriveLetters
1101 ;~ call DEBUG_DumpVolumeLetters
1102 ;~ call DEBUG_DumpPartitionXref
[51]1103 ENDIF
[49]1104
[30]1105
[51]1106; -----------------------------------------------------------------------------
1107; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
1108; -----------------------------------------------------------------------------
1109
1110 ;
1111 ; Reconnect forced drive-letters to their corresponding
1112 ; partitions.
1113 ;
[52]1114 ; BOOKMARK: Update Driveletters so they are in-sync again
[51]1115 call PARTSCAN_UpdateDriveLetters
1116 ; Driveletter <-> Partition correlation is now restored.
1117
1118
1119
1120 ;!
1121 ;! DEBUG_BLOCK
1122 ;! Dump various tables.
1123 ;! Uncomment below to activate.
1124 ;!
1125 IFDEF AUX_DEBUG
1126 ;~ call DEBUG_DumpIPT
1127 ;~ call DEBUG_DumpPartitionPointers
1128 ;~ call DEBUG_DumpNewPartTable
1129 ;~ call DEBUG_DumpDriveLetters
[109]1130 ;~ call DEBUG_DumpDriveLetters
1131 ;~ call DEBUG_DumpVolumeLetters
1132 ;~ call DEBUG_DumpPartitionXref
[51]1133 ENDIF
1134
1135
1136; -----------------------------------------------------------------------------
1137; SHOW WE ARE ALIVE
1138; -----------------------------------------------------------------------------
1139
1140 ;
1141 ; Put some info about AiR-BOOT and the system on the screen.
1142 ;
1143
[49]1144 ; Display number of physical disks found
[37]1145 mov si, offset DisksFound
1146 call MBR_Teletype
1147 mov al, [TotalHarddiscs]
1148 call VideoIO_SyncPos
1149 call VideoIO_PrintByteDynamicNumber
1150 xor si,si
1151 call MBR_TeletypeNL
[30]1152
[49]1153 ; Display number of partitions found
[37]1154 mov si, offset PartitionsFound
1155 call MBR_Teletype
1156 mov al, [CFG_Partitions]
1157 call VideoIO_SyncPos
1158 call VideoIO_PrintByteDynamicNumber
[30]1159
[49]1160 ; Dump summier disk-info for disks found
[37]1161 xor si,si
1162 call MBR_TeletypeNL
1163 call MBR_TeletypeNL
1164 call VideoIO_SyncPos
1165 mov dl,80h
1166 call VideoIO_DumpDiskInfo
[30]1167
1168
1169
1170
1171
[51]1172; -----------------------------------------------------------------------------
1173; eComStation PHASE1 CHECK
1174; -----------------------------------------------------------------------------
1175
1176 ;
[67]1177 ; BOOKMARK: Check for OS/2 being installed
1178 ; Here we check if OS/2 is being installed.
[51]1179 ; If so, we forgo the menu and directly boot it.
1180 ;
1181
1182 ; If the first byte of the name of the Install Volume is not 0
[49]1183 ; then we potentially have a phase1 boot.
[67]1184 test byte ptr [OS2_InstallVolume],0ffh
[49]1185 ; Nope, so continue normally.
1186 jz MBR_Main_ContinueBoot
[36]1187
[49]1188 ; Setup phase1.
1189 ; It is still possible that a name was set for the
1190 ; Install Volume that does not exist.
1191 ; In that case CY will be clear and AL=0FFh.
1192 call PART_SetupPhase1
1193 ; Oops, Install Volume not found, continue normally.
1194 jnc MBR_Main_ContinueBoot
[30]1195
1196
[51]1197 ;
[49]1198 ; == Install Volume Found ==
[51]1199 ;
[30]1200
[51]1201
1202 ;!
1203 ;! DEBUG_BLOCK
1204 ;! Dump various tables.
1205 ;! Uncomment below to activate.
1206 ;!
1207 IFDEF AUX_DEBUG
1208 ;~ call DEBUG_DumpIPT
1209 ;~ call DEBUG_DumpPartitionPointers
1210 ;~ call DEBUG_DumpPartitionXref
1211 ;~ call DEBUG_DumpNewPartTable
1212 ;~ call DEBUG_DumpDriveLetters
1213 ENDIF
1214
1215
[67]1216 ; BOOKMARK: Scan for Partitions (Only if OS/2 install going on)
[51]1217 ; Because one or more partitions are possibly added, the
1218 ; PartitionXref table is not 'in sync' and could cause the
1219 ; wrong system to be automatically booted.
1220 ; So we rescan all partitions causing the PartitionXref
1221 ; table to be filled with correct values so the auto-boot
1222 ; from the new partition will work correctly.
[49]1223 call PARTSCAN_ScanForPartitions
[30]1224
1225
[51]1226 ;!
1227 ;! DEBUG_BLOCK
1228 ;! Dump various tables.
1229 ;! Uncomment below to activate.
1230 ;!
1231 IFDEF AUX_DEBUG
[50]1232 ;~ call DEBUG_DumpIPT
[49]1233 ;~ call DEBUG_DumpPartitionPointers
[50]1234 ;~ call DEBUG_DumpPartitionXref
[49]1235 ;~ call DEBUG_DumpNewPartTable
[51]1236 ;~ call DEBUG_DumpDriveLetters
1237 ENDIF
[30]1238
[51]1239 ; Setup automatic boot to forgo the Menu.
1240 ; PART_SetupPhase1 has filled in the other variables.
1241 mov byte ptr [CFG_AutomaticBoot],1
[30]1242
[51]1243 ;
1244 ; At this point the AiR-BOOT configuration has been altered
1245 ; to automatically boot the newly installed system without
1246 ; displaying the menu.
1247 ; Code further down the road will take care of that.
1248 ;
[49]1249 jmp MBR_Main_ContinueBoot
[30]1250
1251
[49]1252
1253
[51]1254 ;
1255 ; Wether a new system is being installed or not,
1256 ; booting continues here.
1257 ;
1258 MBR_Main_ContinueBoot:
[49]1259
[51]1260 ;
1261 ; Inform user how to switch between post-screen and menu
1262 ; by putting this info on the screen.
1263 ;
[37]1264 xor si,si
1265 call MBR_TeletypeNL
1266 xor si,si
1267 call MBR_TeletypeNL
1268 call MBR_TeletypeSyncPos
1269 xor si,si
1270 call MBR_TeletypeNL
1271 call MBR_TeletypeNL
1272 mov si, offset ShowMenu
1273 call MBR_TeletypeBold
[30]1274
1275
[51]1276 ;
1277 ; Debug stop.
1278 ;
[30]1279
[37]1280 ;
1281 ; ####################### WAIT FOR KEY ########################
1282 ;
[30]1283
[37]1284 ; Wait for key so we can see debug log if ab-menu hangs.
[49]1285 ;~ xor ax, ax
1286 ;~ int 16h
[37]1287 ;call SOUND_Beep
[30]1288
1289
[51]1290 ; Copy BIOS POST to Second Page
[37]1291 mov ax, VideoIO_Page1
[51]1292 call VideoIO_BackUpTo
[30]1293
[37]1294 ;call SOUND_Beep
[30]1295
1296
[52]1297 ; BOOKMARK: Save Configuration
[37]1298 ; Save configuration so phase1 boot-through is disabled
1299 ; on next boot.
[67]1300 mov byte ptr [OS2_InstallVolume], 0
[37]1301 call DriveIO_SaveConfiguration
[31]1302
1303
1304
[37]1305 ;
[51]1306 ; See if setup needs to be entered.
[37]1307 ;
1308 MBR_Main_ReEnterSetup:
1309 call SETUP_CheckEnterSETUP
[7]1310
[51]1311 ;
1312 ; Do some post processing.
1313 ;
[52]1314 ; BOOKMARK: After Crap
[37]1315 call AFTERCRAP_Main
[30]1316
[37]1317 MBR_Main_ReEnterBootMenuPre:
1318 ; SetUp PartitionPointers for BootMenu (filter non-bootable)
1319 call PART_CalculateMenuPartPointers
[7]1320
[37]1321 ; ...and count that one...
[46]1322 cmp byte ptr [PartitionPointerCount], 0
[37]1323 jne MBR_Main_SomethingBootAble
1324 mov si, offset TXT_NoBootAble
1325 call MBR_Teletype
1326 jmp MBR_HaltSystem
[30]1327
[37]1328 MBR_Main_SomethingBootAble:
1329 ; FixUp Values, define Timed Setup booting, etc.
1330 call PART_FixUpDefaultPartitionValues
[7]1331
[30]1332
1333
[37]1334 ; -------------------------------------------------- BOOT-MENU
1335 MBR_Main_ReEnterBootMenu:
1336 call BOOTMENU_ResetMenuVars ; reset has to be done
[46]1337 test byte ptr [CFG_AutomaticBoot], 1
[37]1338 jz MBR_Main_NoAutomaticBooting
[49]1339
1340
[37]1341 ; ------------------------------------------ AUTOMATIC BOOTING
1342 ; Select automatic partition, disable automatic booting for
1343 ; next time and boot system...
[46]1344 mov byte ptr [CFG_AutomaticBoot], 0
[37]1345 call PASSWORD_AskSystemPwd
1346 mov al, Menu_EntryAutomatic
[30]1347
[37]1348 ;mov al, 2
[30]1349
[37]1350 mov Menu_EntrySelected, al ; zero based
1351 jmp MBR_Main_NoBootMenu
[7]1352
[30]1353
[49]1354 MBR_Main_NoAutomaticBooting:
1355
[37]1356 ;call SOUND_Beep
[30]1357
[46]1358 test byte ptr [CFG_BootMenuActive], 0FFh
[37]1359 jnz MBR_Main_GotBootMenu
1360 ; ----------------------------------------------- NO BOOT-MENU
1361 ; Select default partition and boot system...
1362 call PASSWORD_AskSystemPwd
[30]1363
[37]1364 ;call VideoIO_DBG_WriteString2
[30]1365
[37]1366 mov al, Menu_EntryDefault
1367 ;mov al,0 ; zero based
1368 mov Menu_EntrySelected, al
1369 jmp MBR_Main_NoBootMenu
[7]1370
[37]1371 MBR_Main_GotBootMenu:
1372 ; ------------------------------------------ BOOT-MENU VISUALS
[51]1373
1374
1375 IFDEF FX_ENABLED
[37]1376 call FX_StartScreen
[51]1377 ENDIF
[30]1378
[52]1379 ; BOOKMARK: Build Main Menu
[37]1380 call BOOTMENU_BuildBackground
1381 call BOOTMENU_BuildMain
[51]1382
1383 IFDEF FX_ENABLED
[37]1384 call FX_EndScreenRight
[51]1385 ENDIF
1386
[37]1387 call PASSWORD_AskSystemPwd
1388 call BOOTMENU_ResetTimedBoot
[30]1389
[52]1390 ; BOOKMARK: Display Main Menu
[37]1391 call BOOTMENU_Execute
[30]1392
[37]1393 jc MBR_Main_ReEnterSetup
1394 call BOOTMENU_SetVarsAfterMenu
[30]1395
[37]1396 ; ---------------------------------------------------- BOOTING
1397 MBR_Main_NoBootMenu:
[51]1398
1399 IFDEF FX_ENABLED
[37]1400 call FX_StartScreen
[51]1401 ENDIF
1402
[52]1403 ; BOOKMARK: Display bye-screen and start selected partition
[37]1404 call BOOTMENU_BuildGoodBye
[51]1405
1406 IFDEF FX_ENABLED
[37]1407 call FX_EndScreenRight
[51]1408 ENDIF
1409
[37]1410 call PASSWORD_AskChangeBootPwd
[7]1411
[37]1412 call ANTIVIR_SaveBackUpMBR
[7]1413
[49]1414 ; Preload the selected menu-entry
[67]1415 ; However, this value will be wrong if OS/2 phase1 is
[49]1416 ; active and the installation partition is newly created.
1417 ; See below for the adjustment.
1418 mov dl, byte ptr [Menu_EntrySelected]
1419
[51]1420
1421 ;
1422 ; Prepare to start the partition.
1423 ;
[49]1424 jmp MBR_Main_StartPartition
1425
1426
1427
[51]1428; -----------------------------------------------------------------------------
1429; START PARTITION
1430; -----------------------------------------------------------------------------
1431
[49]1432 MBR_Main_StartPartition:
1433
[51]1434 IFDEF AUX_DEBUG
[49]1435 ;~ call DEBUG_DumpIPT
1436 ;~ call DEBUG_DumpPartitionPointers
[50]1437 ;~ call DEBUG_DumpPartitionXref
[49]1438 ;~ call DEBUG_DumpNewPartTable
[51]1439 ENDIF
[49]1440
1441
[37]1442 ; -------------------------------------------- START PARTITION
[51]1443 ; THIS DOES NOT RETURN !
[37]1444 call PART_StartPartition
[30]1445
1446
[31]1447
[51]1448
[30]1449;
[51]1450; This entry-point restarts AiR-BOOT almost from scratch.
1451; It skips the movement of the MBR but otherwise it is a functional restart.
1452; The old BIOS SS:SP where the registers on entry are stored is passed along.
[52]1453; This entry-point is used for debugging purposes.
[51]1454;
[52]1455; BOOKMARK: AiR-BOOT Restart (used for debugging)
[51]1456AirbootRestart:
[79]1457 mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
1458 mov cx, [OldSS] ; Old SS when BIOS transferred control to AB
1459 xor dh, dh ; Head 0
1460 mov dl, [BIOS_BootDisk] ; Disk AirBoot was loaded from
[51]1461 jmp MBR_RealStart
1462
1463
1464;
1465; This entry-point displays a popup that the system is halted
1466; and then halts the system.
1467; It is entered on severe error conditions.
1468;
[52]1469; BOOKMARK: Halt System
[51]1470HaltSystem:
1471 call VideoIO_ClearScreen
1472 mov ax,0ababh
1473 mov cx, 0C04h
1474 mov si, offset SystemHalted
1475 call SETUP_ShowErrorBox
1476 ; Halt the system.
1477 jmp MBR_HaltSystem
1478
1479
1480
1481
1482
1483
1484 ;
[52]1485 ; The following section includes various assembler modules
1486 ; at the source level. These contain functionality for a
1487 ; multitude of categories like disk-access, video-io, lvm,
1488 ; debugging, etc. Later versions of AiR-BOOT will use such
1489 ; modules at the object-file level so they can be shared
1490 ; more easily.
[51]1491 ;
1492
1493
1494; -----------------------------------------------------------------------------
1495; INCLUDED FILE SECTION
1496; -----------------------------------------------------------------------------
1497
[52]1498; BOOKMARK: Include Section
1499
[51]1500;
[30]1501; Include other code-modules here.
1502;
[51]1503
[30]1504b_std_txt:
[60]1505include regular/std_text.asm ; Standard (non-translateable text)
[30]1506size_std_txt = $-b_std_txt
1507
1508b_driveio:
[60]1509include regular/driveio.asm ; Drive I/O, Config Load/Save
[30]1510size_driveio = $-b_driveio
1511
[43]1512b_lvm:
[60]1513include special/lvm.asm ; LVM-specific code
[43]1514size_lvm = $-b_lvm
1515
[30]1516b_videoio:
[60]1517include regular/videoio.asm ; Video I/O
[30]1518size_videoio = $-b_videoio
1519
1520b_timer:
[60]1521include regular/timer.asm ; Timer
[30]1522size_timer = $-b_timer
1523
1524b_partmain:
[60]1525include regular/partmain.asm ; Regular Partition Routines
[30]1526size_partmain = $-b_partmain
1527
1528b_partscan:
[60]1529include regular/partscan.asm ; Partition Scanning
[30]1530size_partscan = $-b_partscan
1531
1532b_bootmenu:
[60]1533include regular/bootmenu.asm ; Boot-Menu
[30]1534size_bootmenu = $-b_bootmenu
1535
1536b_password:
[60]1537include regular/password.asm ; Password related
[30]1538size_password = $-b_password
1539
1540b_other:
[60]1541include regular/other.asm ; Other Routines
[30]1542size_other = $-b_other
[7]1543
[30]1544b_main:
[60]1545include setup/main.asm ; The whole AiR-BOOT SETUP
[30]1546size_main = $-b_main
1547
1548b_math:
[60]1549include regular/math.asm ; Math functions (like 32-bit multiply)
[30]1550size_math = $-b_math
1551
1552b_txtother:
[60]1553include text/txtother.asm ; All translateable Text-Strings
[30]1554size_txtother = $-b_txtother
1555
1556b_txtmenus:
[60]1557include text/txtmenus.asm ; All translateable Menu-text
[30]1558size_txtmenus = $-b_txtmenus
1559
1560b_charset:
[60]1561include text/charset.asm ; Special Video Charsets (if needed)
[30]1562size_charset = $-b_charset
1563
[36]1564b_conv:
[60]1565include regular/conv.asm ; Various conversion routines
[36]1566size_conv = $-b_conv
[30]1567
1568b_virus:
[60]1569include special/virus.asm ; Virus Detection / Anti-Virus
[30]1570size_virus = $-b_virus
[51]1571
[30]1572b_billsuxx:
[60]1573include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
[30]1574size_billsuxx = $-b_billsuxx
1575
1576b_sound:
[60]1577include special/sound.asm ; Sound
[30]1578size_sound = $-b_sound
1579
1580b_apm:
[60]1581include special/apm.asm ; Power Managment Support
[30]1582size_apm = $-b_apm
1583
[51]1584
1585
1586;
1587; Cyrillic support.
1588;
1589IFDEF TXT_IncludeCyrillic
1590b_ccharset:
[60]1591 include special/charset.asm ; Charset Support (e.g. Cyrillic)
[51]1592size_ccharset = $-b_ccharset
1593ENDIF
1594
1595; Various debugging routines, uses AUXIO and CONV
1596IFDEF AUX_DEBUG
1597b_debug:
[60]1598include regular/debug.asm ; Debug module
[51]1599size_debug = $-b_debug
1600b_auxio:
[60]1601include regular/auxio.asm ; Com-port support for debugging
[51]1602size_auxio = $-b_auxio
1603ENDIF
1604
1605;
1606; We only include this if FX_ENABLED is defined.
1607; FX is disabled when debugging to have more room for debug-code.
1608; The module compiles to 50eh = 1294 bytes, so that is a lot.
1609;
1610IFDEF FX_ENABLED
[30]1611b_fx:
[60]1612include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
[30]1613size_fx = $-b_fx
[51]1614ENDIF
[30]1615
1616
[51]1617 ;
1618 ; End of code marker.
1619 ;
[52]1620 ; BOOKMARK: END OF CODE
[51]1621 db 'BABE'
1622 db 'FACE'
[30]1623
[47]1624
[51]1625; -----------------------------------------------------------------------------
1626; END OF CODE
1627; -----------------------------------------------------------------------------
1628code_end:
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639; -----------------------------------------------------------------------------
1640; BLDLEVEL INFORMATION
1641; -----------------------------------------------------------------------------
1642
[52]1643 ; BOOKMARK: BLDLEVEL Information
[51]1644 ORIGIN 068A0h
1645
1646;
1647; The space between this offset and code_end is the space
1648; available for code.
1649;
1650zzz_code_space = $ - code_end
1651
1652
[46]1653bld_level:
[43]1654 ;
[46]1655 ; Here we insert the OS/2 BLDLEVEL Information.
1656 ; It is composed of the AiR-BOOT version-info and other
[51]1657 ; information. It is unique for each release of AiR-BOOT.
[46]1658 ;
[51]1659
1660 ;
[47]1661 ; ?? When AUX_DEBUG is enabled and the above org is active,
1662 ; the BLDLEVEL gets corrupted eventhough it gets inserted here
1663 ; explicitly. The effect is almost like an 'OR' or a merge
1664 ; with the already generated FX code.
1665 ; Tasm and JWasm produce different results.
1666 ; ??
1667 ;
[46]1668 InsertBuildLevel
1669
[47]1670
[30]1671
[7]1672
1673
[51]1674;==============================================================================
1675; Sector 53
1676;==============================================================================
1677
[45]1678 ;
[51]1679 ; From here on, the layout of the image consists of:
1680 ; - AiR-BOOT Protection Image
1681 ; - AiR-BOOT Configuration
1682 ; - DriveLetters
1683 ; - Install Volume
1684 ; - Floppy/CDROM/BIOS BOOT ENTRIES
1685 ; - Internal Partition Table (IPT)
1686 ; - Hidden Partition Table (HPT)
1687 ; - MBR Backup
[45]1688 ;
[7]1689
[37]1690 ;
[51]1691 ; After that, the BSS follows with several runtime
1692 ; variables and structures.
1693 ; The BSS is not part of the image on disk of course.
1694 ;
1695
1696; -----------------------------------------------------------------------------
1697; PROTECTION IMAGE
1698; -----------------------------------------------------------------------------
1699
1700 ;
[52]1701 ; This is the AiR-BOOT MBR Protection Image.
[46]1702 ; The stuff generated here gets overwritten when the
[51]1703 ; MBR_PROT module, which is assembled separately,
1704 ; gets binary merged.
[37]1705 ; So you won't find the string below in the generated binary.
1706 ;
[52]1707 ; BOOKMARK: AiR-BOOT MBR Protection Image
[51]1708 ORIGIN 06900h
[46]1709
1710
[51]1711
1712
[46]1713;
[51]1714; Hardcoded to 768 bytes (MBR_PROT.ASM)
[46]1715; The string below is searched for by the FIXCODE helper and *must* be
[51]1716; page (256 bytes) aligned.
[46]1717;
[51]1718; It seems to be possible to shrink the protection-image to 768 bytes.
1719; That gives us an additional 256 bytes of code-space.
1720; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
1721; Also the granularity needs to change from 512 bytes to 256 bytes since
1722; 6900h is not a 512-byte boundary.
1723;
1724; 20120908 - Done.
1725;
[37]1726MBR_Protection db 'AiR-BOOT MBR-Protection Image'
1727
[43]1728 ; Just fill.
[51]1729 ;~ db 1024-($-MBR_Protection) dup('M')
1730 db 768-($-MBR_Protection) dup('M')
[37]1731
1732
[51]1733
1734
1735
1736
1737
[31]1738;==============================================================================
[51]1739; Sector 55
1740;==============================================================================
1741; -----------------------------------------------------------------------------
1742; AiR-BOOT CONFIGURATION
1743; -----------------------------------------------------------------------------
[30]1744
[37]1745 ;
1746 ; This section contains the AiR-BOOT configuration.
1747 ; Note that it has a version that should be updated
1748 ; when stuff is added.
1749 ; Also add stuff to the end so that offsets of other
1750 ; variables remain vaild.
1751 ;
[52]1752 ; BOOKMARK: AiR-BOOT Configuration Sector
[45]1753 ORIGIN 06C00h
[30]1754
[37]1755Configuration:
[69]1756 ; This is the signature for the AiR-BOOT Configuration.
1757 ; Note that this configuration section, like the code section,
1758 ; is CRC protected. This means that poking values in these
1759 ; sections on the disk will invalidate AiR-BOOT and cause it
1760 ; to halt. This is a protection method against other software
1761 ; modifying stuff in track 0.
1762 db 'AiRCFG-TABLE',0adh
[55]1763 db 01h, 10h, 'U' ; "Compressed" ID String
[37]1764 ; Version 1.02 was for code 1.06, 1.03 was internal
1765 ; and 1.04,1.05 and 1.06 do not exist.
[46]1766 ;
1767 ; 1.07 was used with AB v1.07 and introduced the phase1
1768 ; system-name. For the rest it is compatible with v1.02.
1769 ;
1770 ; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
1771 ; of several components and the packing of the hideparttable.
1772 ; The core configuration has not changed but the generated
1773 ; configuration has. The v1.0.8 installer handles upgrading.
1774 ;
[54]1775 ; It has been decided that uneven minor numbers will be
1776 ; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
[60]1777 ;
[37]1778 ; It is not required for the config to have the
1779 ; same version as the code, so in the future
1780 ; the code version might be higher than the
1781 ; config version if there are no changes to the latter.
[46]1782 ;
[7]1783
[37]1784CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
1785CFG_LastTimeEditHi dw 0 ; second 16 bit part...
[7]1786
[37]1787CFG_CheckConfig dw 0 ; Check-Sum for Configuration
[7]1788
[37]1789CFG_Partitions db 0 ; Count of partitions in IPT
[51]1790CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
[37]1791CFG_PartDefault db 0 ; Default-Partition (Base=0)
[7]1792
[37]1793CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
1794CFG_TimedBoot db 0 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
1795CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
1796CFG_TimedDelay dw 123 ; Timed Boot - Delay
1797CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
1798CFG_RememberBoot db 1 ; Remember Manual Boot Choice
1799CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
1800CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
1801CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
[7]1802 ; v0.29+ -> 2 - Detailed Bootmenu
[37]1803CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
1804CFG_PasswordSetup db 0 ; Ask Password when entering Setup
1805CFG_PasswordSystem db 0 ; Ask Password when booting System
1806CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
1807CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
1808CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
1809CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
1810CFG_DetectVirus db 0 ; Detect Virus ?
1811CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
1812CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
1813CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
1814CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
1815 dw 07A53h
1816 dw 0E797h
1817 dw 0A896h
1818CFG_BootPassword dw 0101Fh ; Another CR... ;-)
1819 dw 07A53h
1820 dw 0E797h
1821 dw 0A896h
1822 db 0 ; Rude-Protection - Removed since v0.28b
1823CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
1824CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
1825 ; 0 - Do Nothing
1826 ; 1 - Reset Time
1827 ; 2 - Stop Time
1828CFG_MakeSound db 0 ; Should be clear ;)
1829CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
[51]1830CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
[37]1831 ; 0 - Disabled
1832 ; 1 - CD-ROM
1833 ; 2 - Network
1834 ; 3 - ZIP/LS120
1835CFG_CooperBars db 0 ; If Cooper Bars should be shown
1836CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
1837CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
1838 ; FFh -> Disabled
1839CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
1840CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
1841CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
1842CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
1843CFG_PartAutomatic db 0 ; Partition-No for automatic booting
1844CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
1845CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
[7]1846
[30]1847
1848;
1849; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
1850;
1851
[45]1852 ;
1853 ; Drive Letters.
1854 ;
[52]1855 ; BOOKMARK: Stored Drive Letters
[45]1856 ORIGIN 06CB0h
[30]1857
1858
[51]1859; -----------------------------------------------------------------------------
1860; DRIVE LETTERS
1861; -----------------------------------------------------------------------------
1862
[45]1863;
1864; Moved here to make room for packed hiddenparttable.
[71]1865; This gets filled with drive-letters that are assigned using the dl-feature.
[45]1866;
1867DriveLetters db LocIPT_MaxPartitions dup (0)
1868 ; Format is:
1869 ;============
1870 ; Drive-Letter : BYTE (80h-C:, 81h-D:)
1871 ; --------------------> 1 Byte * 45
[30]1872
[51]1873
1874
1875; -----------------------------------------------------------------------------
1876; INSTALL VOLUME
1877; -----------------------------------------------------------------------------
1878
[45]1879 ;
[37]1880 ; Allways have the name of the installation volume
1881 ; at this offset.
1882 ; So future config changes will not break auto-install.
[45]1883 ;
[67]1884 ; BOOKMARK: Name of OS/2 Installation Volume
[45]1885 ORIGIN 06D00h
[37]1886
[67]1887; SET(A)BOOT stores the volume name of the OS/2 system being installed here.
[31]1888; It is truncated to 11 chars because AiR-BOOT currently does not support
1889; longer labelnames. The name is also capitalized.
[67]1890OS2_InstallVolume db 0,'NOPHASEONE' ,0
[30]1891
[37]1892;
1893; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
1894;
1895
[51]1896
1897; -----------------------------------------------------------------------------
1898; FLOPPY/CDROM/BIOS BOOT ENTRIES
1899; -----------------------------------------------------------------------------
1900
[37]1901 ;
1902 ; 06DABh - 06C00h = 01ABh = 427 bytes.
1903 ; Entries allocated down from 06E00 boundary.
1904 ;
[52]1905 ; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
[46]1906 ORIGIN 06DABh ; 427 Boundry
[37]1907
1908; (432 - 5 = 427)
1909AutoDrvLetter db 0
1910AutoDrvLetterSerial dd 0
1911
1912; This entry is also 34 bytes long (466 - 34 = 432)
1913BIOScontIPTentry:
1914 db 0, 0, 0, 0, ' '
1915 db 0, 0FEh, Flags_Bootable
1916 dw 0 ; No Checksum :)
1917 db 0, 1, 0
1918 db 0, 1, 0 ; Location of Partition/Boot Record
1919 dd 0, 0
1920
[7]1921; VIR variables are for the AiR-BOOT Anti Virus Code
1922; Most of them are backups of Interrupt Points, so we can check, if a
1923; stealth virus is on-line, we can intercept its call.
1924; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
[46]1925; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
1926; system from working, so the user has to press reset.
1927; That's saver than a Reboot.
[7]1928;
1929; If a virus is found on the partition to boot, the system will ONLY halt,
1930; nothing more, because we can not remove it. The user shall do it :)
1931; Those viruses are detected via a real nasty method...Checksum-Checking of the
1932; boot-record, which is to be executed. If it does not match the one in our
1933; internal partition table, we will stop. You may however switch this detection
1934; off or just reset it by switching 'VIBR Detection'.
1935
[37]1936; 478 - 12 = 466 ; 466 Sub-Part
1937CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
1938CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
1939CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
[30]1940
[37]1941; 478 Boundry (512-34)
1942; This entry is also 34 bytes long
1943FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
1944 db 0, 0FFh, Flags_Bootable
1945 dw 0 ; No Checksum :)
1946 db 0, 1, 0
1947 db 0, 1, 0 ; Location of Partition/Boot Record
1948 dd 0, 0
[30]1949
1950
[51]1951
1952; -----------------------------------------------------------------------------
1953; INTERNAL PARTITION TABLE (IPT)
1954; -----------------------------------------------------------------------------
1955
[45]1956 ;
1957 ; AiR-BOOT Internal Partition Table (IPT)
1958 ;
[52]1959 ; BOOKMARK: Internal Partition Table
[45]1960 ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
[30]1961
1962
[45]1963;
1964; Rousseau: This is the start of the AiR-BOOT IPT
1965;
1966PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
1967; no-partitions detected... :]
[7]1968; db 1, 0, 0, 0, 'Harddisc 1'
1969; db 0, 0FFh, Flags_BootAble
1970; dw 0 ; No Checksum :)
1971; db 0, 0, 1
[46]1972; db 0, 0, 1 ; Location of Partition/Boot Record
[7]1973; dd 0, 0
1974
[37]1975 ; Format is:
1976 ;============
1977 ; SerialNumber * 4
1978 ; PartitionName * 11
1979 ; Drive * 1
1980 ; SystemID * 1 (means the partition type)
1981 ; Flags * 1
1982 ; Checksum * 2 (for virus checking)
1983 ; LocationBegin * 3 (where the partition begins)
1984 ; LocationPartTab * 3 (where the partition table is)
1985 ; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
1986 ; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
1987 ; --------------------> 34 Bytes (total maximum partition-entries = 30)
[7]1988
[30]1989
[37]1990
1991 ; No need to check overlap here because this string will
1992 ; be overwritten if the maximum partition count is reached.
1993 ; So this is not a critical boundary.
[45]1994 ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
[37]1995
1996 db 'AiRBOOTPAR' ; 1K internal partition table
[30]1997
1998
1999
[51]2000; -----------------------------------------------------------------------------
2001; HIDDEN PARTITION TABLE (HPT)
2002; -----------------------------------------------------------------------------
[30]2003
[45]2004 ;
2005 ; Hidden Partition Table (6-bit packed as of v1.0.8)
2006 ;
[52]2007 ; BOOKMARK: Hidden Partition Table (packed)
[45]2008 ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
[30]2009
[38]2010HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
[37]2011 ; Format is:
2012 ;============
2013 ; PartitionPtr : BYTE * 30
[38]2014 ; --------------------> 30 Bytes * 45
[30]2015
[37]2016;
[45]2017; Driveletters were here.
2018; Moved down to make room for packed hideparttable.
2019;
[30]2020
[37]2021
[45]2022 ;
2023 ; End of hidden partition table.
2024 ; Check overlap here for security reasons.
2025 ;
2026 ORIGIN % (image_size - 200h - 5)
[30]2027
[45]2028; 79fa - end of packed hide table
2029 db 'ABHID' ; 1K internal Hide-partition table
[30]2030
2031
2032
2033
[51]2034;==============================================================================
2035; Sector 62
2036;==============================================================================
2037; -----------------------------------------------------------------------------
2038; MBR BACKUP
2039; -----------------------------------------------------------------------------
[37]2040
[45]2041 ;
2042 ; AiR-BOOT MBR Backup.
2043 ;
[52]2044 ; BOOKMARK: MBR Backup
[45]2045 ORIGIN % (image_size - 200h)
[37]2046
[31]2047
[46]2048MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
2049 ' - Just to fill this sector with something',0
[37]2050AirBootRocks db 'AiR-BOOT Rocks!',0
[7]2051
[45]2052 db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
[36]2053
[45]2054 ; End of Image signature.
2055 ;
2056 ORIGIN % (image_size - 2)
2057 dw 0BABEh
[30]2058
2059
[45]2060 ;
2061 ; End of Image.
2062 ;
2063 ORIGIN % (image_size)
[97]2064image_end:
[30]2065
2066;
[51]2067; Terminate LDRIMAGE segment.
[30]2068;
[51]2069IFDEF SEGMENTED
[43]2070LDRIMAGE ENDS
[51]2071ENDIF
[30]2072
[37]2073
[51]2074
2075
2076
2077
2078
2079;##############################################################################
2080; BSS SEGMENT
2081;##############################################################################
2082
[52]2083; BOOKMARK: BSS Segment
[51]2084
[30]2085;
[51]2086; Open BSS segment.
[30]2087;
[51]2088IFDEF SEGMENTED
[37]2089VOLATILE SEGMENT USE16 PUBLIC 'BSS'
2090ENDIF
2091
[46]2092
2093
[30]2094sobss:
[31]2095;------------------------------------------------------------------------------
[46]2096
[37]2097 ;
[46]2098 ; Removed ORG for BSS data to be more compatible
[38]2099 ; with segment-concatenated layout.
[37]2100 ;
[42]2101 ; What happens before this space ??
2102 ; If org 0 corruption occurs.
[46]2103 ;
2104
2105 ;
[45]2106 ; Filling hiddenparttable goes out-of-bounds !
[46]2107 ; Fixed with 6-bit packing.
[42]2108 ;
[37]2109
[46]2110;
2111; If segmented, offsets are relative to the BSS segment.
2112; They are resolved at link-time.
2113; If not segmented, offsets are relative to the CODE segment.
2114;
2115IFDEF SEGMENTED
2116 ORG 02400h
2117ELSE
2118 ORG 0A000h
2119ENDIF
2120
2121
[51]2122; -----------------------------------------------------------------------------
2123; START OF BSS DATA
2124; -----------------------------------------------------------------------------
2125
[7]2126; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
2127BeginOfVariables:
[51]2128
2129
2130; -----------------------------------------------------------------------------
2131; SECTOR BUFFERS
2132; -----------------------------------------------------------------------------
[52]2133; BOOKMARK: Sector Buffers
[46]2134PartitionSector db 512 dup (?) ; Temporary Sector for Partition
[51]2135PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
[46]2136LVMSector db 512 dup (?) ; Temporary Sector for LVM
2137TmpSector db 512 dup (?) ; Temporary Sector
[82]2138Scratch db 512 dup (?) ; Scratch buffer
[30]2139
[51]2140; -----------------------------------------------------------------------------
2141; NEW PARTITION TABLE
2142; -----------------------------------------------------------------------------
[7]2143; Everything used to build a new IPT and reference it to the old one
[52]2144; BOOKMARK: New Partition Table
[46]2145NewPartTable db 1536 dup (?) ; New Partition Table
[43]2146
[51]2147
2148; -----------------------------------------------------------------------------
2149; NEW HIDE PARTITION TABLE
2150; -----------------------------------------------------------------------------
[52]2151; BOOKMARK: New Hide-Partition Table
[51]2152NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
[7]2153
[51]2154 ;~ even
2155
2156; -----------------------------------------------------------------------------
2157; NEW DRIVE LETTERS
2158; -----------------------------------------------------------------------------
[52]2159; BOOKMARK: Logical Drive-Letters
[51]2160NewDriveLetters db LocIPT_MaxPartitions dup (?)
[7]2161
[51]2162 ;~ even
2163
2164; -----------------------------------------------------------------------------
2165; PARTITION SIZE TABLE
2166; -----------------------------------------------------------------------------
[46]2167; Size-Table (6 bytes per partition)
[52]2168; BOOKMARK: Partition Size Table
[51]2169PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
[46]2170
[51]2171
2172; -----------------------------------------------------------------------------
2173; PARTITION POINTERS
2174; -----------------------------------------------------------------------------
[49]2175; Maximum is 52 word entries till now
[52]2176; BOOKMARK: Partition Pointers
[46]2177PartitionPointers dw 52 dup (?)
2178
2179; Count of total Partition Pointers
2180PartitionPointerCount db ?
2181
[51]2182; -----------------------------------------------------------------------------
2183; XREF TABLE
2184; -----------------------------------------------------------------------------
2185
[46]2186; X-Reference Table (holds new partnr, index is old part nr)
[52]2187; BOOKMARK: Xref Table
[51]2188PartitionXref db LocIPT_MaxPartitions dup (?)
[46]2189
[51]2190; -----------------------------------------------------------------------------
2191; VOLUME LETTERS
2192; -----------------------------------------------------------------------------
2193
[46]2194; Volume-Letters
2195; 0 - no LVM support
2196; 1 - LVM support, but no letter
2197; 'C'-'Z' - assigned drive letter
[52]2198; BOOKMARK: Volume Drive Letters
[51]2199PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
[46]2200
2201
2202
[51]2203; -----------------------------------------------------------------------------
2204; MISC VARS AND FLAGS
2205; -----------------------------------------------------------------------------
[52]2206; BOOKMARK: Misc Vars and Flags
[46]2207TotalHarddiscs db ? ; Total harddrives (by POST)
2208LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
2209NewPartitions db ? ; Freshly found partitions
[37]2210 ; Independent of SaveConfiguration
[46]2211TooManyPartitions db ? ; Non-zero if too many partitions found
[7]2212
[46]2213VideoIO_Segment dw ? ; Segment for Video I/O
[7]2214
[46]2215ExtendedAbsPos dd ? ; Extended Partition Absolute Position
2216ExtendedAbsPosSet db ? ; If Absolute Position set
[7]2217
[46]2218CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
2219CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
2220 ; (filled out by PreCrap)
2221CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
[37]2222 ; (for detailed error message)
[7]2223
[29]2224; [Linux support removed since v1.02]
2225;GotLinux db ? ; 1-Linux found
[7]2226
[51]2227
2228; -----------------------------------------------------------------------------
2229; MENU RELATED VARS
2230; -----------------------------------------------------------------------------
[46]2231Menu_EntrySelected db ? ; Which partition we boot this time...
2232Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
2233Menu_AbsoluteX db ? ; Pos where Menu stuff starts
2234Menu_TotalParts db ? ; Copy of CFG_BootParts
2235Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
2236Menu_EntryDefault db ? ; Default Entry in filtered View
2237Menu_EntryLast db ? ; LastBooted Entry in filtered View
2238Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
[7]2239 ; - All adjusted to menu locations
2240
[51]2241; -----------------------------------------------------------------------------
2242; PARTITION RELATED VARS
2243; -----------------------------------------------------------------------------
[46]2244PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
2245PartSetup_ActivePart db ? ; Active Partition
2246PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
2247PartSetup_HiddenX db ? ; Pos for Hidden-Setup
2248PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
[7]2249
[51]2250; -----------------------------------------------------------------------------
2251; TIMER / SETUP RELATED VARS
2252; -----------------------------------------------------------------------------
[46]2253TimedBootEnable db ? ; Local Enable/Disable for timed boot
2254TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
2255TimedSecondLeft db ? ; How many seconds are left till boom ?
2256TimedSecondBack db ? ; To get a modification noticed
2257TimedBootUsed db ? ; Timed Boot used for bootup ?
2258FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
2259SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
2260SETUP_ExitEvent db ? ; Exit Event to end SETUP
2261TempPasswordEntry db 17 dup (?)
2262SETUP_OldPwd db 17 dup (?)
2263SETUP_NewPwd db 17 dup (?)
2264SETUP_VerifyPwd db 17 dup (?)
2265StartSoundPlayed db ?
2266ChangePartNameSave db ? ; Save label after user-edit ?
2267SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
[7]2268
[51]2269
2270; -----------------------------------------------------------------------------
2271; FX RELATED VARS
2272; -----------------------------------------------------------------------------
[37]2273FX_UseCount dw ?
2274FX_OverallTimer dw ?
2275FX_WideScrollerTimer dw ?
2276FX_WideScrollerCurPos dw ?
2277FX_WideScrollerSpeed db ?
2278FX_WideScrollerSpeedState db ?
2279FX_WideScrollerDirection db ?
2280FX_WideScrollerAbsDirection db ?
2281FX_WideScrollerBounceSpeed db ?
2282FX_CooperBarsTimer dw ?
[7]2283
[51]2284; Dynamically Generated Tables - do not need to get initialized with NUL
2285FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
2286FX_CooperState db 7 dup (?)
2287FX_SinusPos db 7 dup (?)
2288FX_CooperPos dw 7 dup (?)
2289
2290
2291; -----------------------------------------------------------------------------
2292; CHARSET BUFFER
2293; -----------------------------------------------------------------------------
2294CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
2295
2296; -----------------------------------------------------------------------------
2297; LVM CRC TABLE
2298; -----------------------------------------------------------------------------
2299LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
2300
[7]2301
2302
[30]2303;
2304; Rousseau: added some stuff.
2305;
[51]2306; -----------------------------------------------------------------------------
2307; ECS PHASE1 RELATED
2308; -----------------------------------------------------------------------------
[49]2309Phase1Active db ?
2310OldPartitionCount db ?
[30]2311
[51]2312
2313; -----------------------------------------------------------------------------
2314; DISK PARAMETERS
2315; -----------------------------------------------------------------------------
[30]2316 ;EVEN
[37]2317HugeDisk db MaxDisks dup(?)
2318TrueSecs dd MaxDisks dup(?)
[30]2319
2320; BIOS geometry of the boot-drive
2321; Note that heads cannot be 256 due to legacy DOS/BIOS bug
2322; If Int13X is supported those values are used, otherwise the legacy values.
[37]2323BIOS_Cyls dd MaxDisks dup(?)
2324BIOS_Heads dd MaxDisks dup(?)
2325BIOS_Secs dd MaxDisks dup(?)
2326BIOS_Bytes dw MaxDisks dup(?)
2327BIOS_TotalSecs dq MaxDisks dup(?)
[30]2328
2329; LBA geometry of the boot-drive
2330; Note that these values are taken from the BPB of a partition boot-record
[37]2331LVM_Cyls dd MaxDisks dup(?)
2332LVM_Heads dd MaxDisks dup(?)
2333LVM_Secs dd MaxDisks dup(?)
2334LVM_Bytes dw MaxDisks dup(?)
2335LVM_TotalSecs dq MaxDisks dup(?)
[30]2336
2337; OS/2 geometry of the boot-drive
2338; Note that these values are taken from the BPB of a partition boot-record
[37]2339LOG_Cyls dd MaxDisks dup(?)
2340LOG_Heads dd MaxDisks dup(?)
2341LOG_Secs dd MaxDisks dup(?)
2342LOG_Bytes dw MaxDisks dup(?)
2343LOG_TotalSecs dq MaxDisks dup(?)
[30]2344
[51]2345; Get's initialized at startup to: 00000011111111111111111111111100b
2346; Meaning A,B not free; C-Z free, rest unused. (right to left)
2347; Each partition with an assigned drive-letter clears a bit in this map.
2348FreeDriveletterMap dd ?
[30]2349
[51]2350; LBA address of master LVM sector, zero if non-existant
2351MasterLVMLBA dd ?
[30]2352
[51]2353
2354; -----------------------------------------------------------------------------
[105]2355; INT13X DAP
[51]2356; -----------------------------------------------------------------------------
[105]2357
2358; Disk Address Package that holds information for LBA-access using INT13X
2359INT13X_DAP db ? ; Size of paket, inserted by code
2360 db ? ; Reserved
2361INT13X_DAP_NumBlocks dw ? ; Number of blocks
2362INT13X_DAP_Transfer dd ? ; Transfer Adress
2363INT13X_DAP_Absolute dd ? ; Absolute Sector
2364 dd ? ; Second Part of QWORD
2365INT13X_DAP_Size = $-offset [INT13X_DAP] ; Calculated size
2366
[46]2367;
[52]2368; BOOKMARK: Temporary buffer for 48h INT13X bios call.
[46]2369;
[30]2370
[46]2371 ; Size of the buffer.
2372 ; this param *must* be filled in.
2373 ; Code inserts it.
2374i13xbuf dw 1 dup (?)
[30]2375
[46]2376 ; The buffer itself.
2377 db 126 dup(?)
2378
2379 ; Size of buffer calculated.
2380 ; (excluding the size word at the start).
2381 i13xbuf_size = $-offset i13xbuf-2
2382
2383 ; Some debug area.
[89]2384dbg_scratch db 512 dup(?)
[44]2385
[51]2386
2387; End of transient variables.
2388EndOfVariables:
2389
2390
2391
2392
2393; -----------------------------------------------------------------------------
2394; OLD AND NEW STACKS
2395; -----------------------------------------------------------------------------
[52]2396; BOOKMARK: Storage for Old and New Stack Pointers
[51]2397;
2398; These need to be outside the variable section because AiR-BOOT can restart
2399; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
2400; they would be cleared on AiR-BOOT restart.
2401;
2402
2403; The variable section is cleared word-wise, so it could clear one byte extra
2404; depending on the alignment and size. This DD prevents the OldSP and OldSS
2405; to be partly overwritten by the clearing routine.
2406 dd ?
2407
2408; SS:SP from before our relocation.
2409; The registers values when the BIOS transferred control to us were pushed
2410; on this stack.
2411
2412OldSP dw ?
2413OldSS dw ?
2414
2415; SS:SP currently in use.
2416; They are temporarily dumped here so we can pop the resgisters from
2417; the old stack to display them in debug mode.
2418CurrentSP dw ?
2419CurrentSS dw ?
2420
2421;
2422; End of BSS segment.
2423;
[30]2424eobss:
2425
[51]2426;
[97]2427; Total RAM occupied, including BSS.
2428; BASE is 8000:0000, LIMIT is 8000:FFFF.
2429; Note that the LDRIMAGE is of constant size, 7C00h = 62 sectors of 512 bytes.
2430;
2431resident_size = (offset eobss + image_size)
2432
2433;
[51]2434; Close BSS segment.
2435;
[37]2436IFDEF SEGMENTED
[46]2437 VOLATILE ENDS
[37]2438ELSE
[46]2439 LDRIMAGE ENDS
[37]2440ENDIF
[43]2441
[52]2442 ; BOOKMARK: End of Module
[45]2443 END AiR_BOOT
[30]2444
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