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airboot.asm@ 83

Last change on this file since 83 was 82, checked in by Ben Rietbroek, 8 years ago

Increased scratch buffer [v1.1.1-testing]

Now it can hold a sector, handy while debugging.

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: 94.9 KB

Line
1	;
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	;
19
20
21
22
23
24
25
26	;##############################################################################
27	; AiR-BOOT / DEFINITIONS
28	;##############################################################################
29
30	;
31	; Include AiR-BOOT Version Information.
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.
35	;
36	include ../include/version.inc
37
38	;
39	; Include OS/2 BLDLEVEL Information.
40	; It uses the version-information in VERSION.INC to build it's signature.
41	;
42	include bldlevel.inc
43
44	;
45	; Include some macro's.
46	; This file contains the ORIGIN macro that is used to detect overlaps.
47	;
48	include ../include/asm.inc
49
50
51	; We actually don't want to use this directive because it generates extra
52	; NOP instructions that we can do without.
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.
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)
60	IFDEF TASM
61	;~ JUMPS
62	ENDIF
63
64
65	;
66	; If defined then each module is prefixed with it's name.
67	; This is used for debugging purposes but it also increases code space.
68	; It should be off in release code.
69	;
70	;~ MODULE_NAMES EQU
71
72
73
74	; -----------------------------------------------------------------------------
75	; DEBUG
76	; -----------------------------------------------------------------------------
77
78	;
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.
82	;
83	AUX_DEBUG EQU
84
85	;
86	; To have FX enabled, make sure FX_ENABLE is defined.
87	; There is no need (for now) to remove Cooper Bars from the setup-menu
88	; because AiR-BOOT does not crash when enabling Cooper Bars while FX
89	; is not compiled in. Only TAB to post-screen does not work.
90	; Way to go Martin !
91	;
92	IFNDEF AUX_DEBUG
93	FX_ENABLED EQU
94	ENDIF
95
96
97
98	; -----------------------------------------------------------------------------
99	; AUX
100	; -----------------------------------------------------------------------------
101	;
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	;
111
112	; 9600 bps, no parity, 1 stop-bit, 8 bits per char
113	AUX_INIT_PARMS EQU 11100011b
114
115	; Com-port for debugging, 0 is disabled
116	BIOS_COM_PORT EQU 1
117
118	; Default word value for BIOS_AuxParms variable
119	; Note that is has moved since v1.07
120	BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
121
122	; Default byte value for BIOS_BootDisk variable
123	BIOS_BOOTDISK_DEFAULT EQU 80h
124
125
126
127	; -----------------------------------------------------------------------------
128	; LABELS
129	; -----------------------------------------------------------------------------
130	; Address labels after code-move
131	BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
132	BootBasePtr equ 0h ; We put our MBR to this location
133	BootBaseExec equ BootBasePtr+offset MBR_RealStart
134	StackSeg equ 07000h ; Put the stack below the code
135	StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
136	StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
137
138
139
140	; -----------------------------------------------------------------------------
141	; VIDEO
142	; -----------------------------------------------------------------------------
143	; Video pages, no INT 10h is used for menu-drawing etc.
144	VideoIO_Page0 equ 0B800h
145	VideoIO_Page1 equ 0B900h
146	VideoIO_Page2 equ 0BA00h
147	VideoIO_Page4 equ 0BC00h
148	VideoIO_FXSegment equ 0A000h
149
150	; Special line-drawing characters
151	TextChar_WinLineRight equ 0C4h
152	TextChar_WinLineDown equ 0B3h
153	TextChar_WinRep1 equ 0D1h
154	TextChar_WinRep2 equ 0C5h
155	TextChar_WinRep3 equ 0CFh
156	TextChar_WinRep4 equ 0B5h
157	TextChar_WinRep5 equ 0C6h
158	TextChar_WinRep6 equ 0D8h
159
160
161
162	; -----------------------------------------------------------------------------
163	; PARTITION TABLE
164	; -----------------------------------------------------------------------------
165	; Offsets for Partition-Entries in MBR/EBRs
166	LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
167	LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
168	LocBRPT_BeginCHS equ 1 ; Packed CHS value
169	LocBRPT_BeginHead equ 1 ; Start head, usually < 16
170	LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
171	LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
172	LocBRPT_SystemID equ 4 ; Type of system using the partition
173	LocBRPT_EndCHS equ 5 ; Packed CHS value
174	LocBRPT_EndHead equ 5 ; End head, usually < 16
175	LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
176	LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
177	LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
178	LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
179
180	; Signature relative to start of MBR/EBR
181	LocBR_Magic equ 510 ; Offset of 0AA55h signature
182
183	; -----------------------------------------------------------------------------
184	; LVM RECORD
185	; -----------------------------------------------------------------------------
186	; Used as a quick compare in LVM.ASM
187	LocLVM_SignatureByte0 equ 02h
188
189	; Offsets for LVM Information Sector.
190	; These are relative to the start of the LVM sector.
191	LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
192	LocLVM_CRC equ 08h ; CRC is a DWORD
193	LocLVM_Heads equ 1ch ; Number of heads
194	LocLVM_Secs equ 20h ; Sectors per Track
195	LocLVM_DiskName equ 24h ; Name of the disk
196	LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
197	LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
198
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.
204	LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
205
206
207	; -----------------------------------------------------------------------------
208	; LVM ENTRY
209	; -----------------------------------------------------------------------------
210	; Offsets for LVM entry.
211	; These are relative to the start of the entry.
212	LocLVM_VolumeID equ 00h ; DWORD
213	LocLVM_PartitionID equ 04h ; DWORD
214	LocLVM_PartitionSize equ 08h ; DWORD
215	LocLVM_PartitionStart equ 0ch ; DWORD
216	LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
217	LocLVM_Startable equ 11h ; is Startable (newly installed system)
218	LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
219	LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
220	LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
221
222	; Truncated to 11 chars when displayed in menu.
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.
226	; These offsets are relative to an LVM entry.
227	LocLVM_VolumeName equ 14h ; 20 bytes
228	LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
229
230	; LVM constants.
231	LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
232	LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
233	LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
234	LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
235
236
237	; -----------------------------------------------------------------------------
238	; AiR-BOOT IPT
239	; -----------------------------------------------------------------------------
240	; Offsets for IPT (Internal Partition Table)
241	LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
242	LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
243	LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
244	LocIPT_Serial equ 0 ; Serial from MBR ?
245	LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
246	LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
247	LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
248	LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
249	LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
250	LocIPT_LocationBegin equ 20 ; Begin of Partition
251	LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
252	LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
253	LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
254
255
256	; AiR-BOOT IPT-Flags
257	LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
258	LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
259
260	Flags_Bootable equ 00000001b
261	Flags_VIBR_Detection equ 00000010b
262	Flags_HideFeature equ 00000100b
263	Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
264	Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
265	Flags_NoPartName equ 01000000b
266	Flags_NowFound equ 10000000b ; temp only in OldPartTable
267	Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
268
269	FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
270	FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
271	FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
272	FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
273
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 !
282	LocHPT_LenOfHPT equ 34
283
284
285	; -----------------------------------------------------------------------------
286	; NAVIGATION KEYS
287	; -----------------------------------------------------------------------------
288	; Navigation keys
289	Keys_Up equ 48h
290	Keys_Down equ 50h
291	Keys_Left equ 4Bh
292	Keys_Right equ 4Dh
293	Keys_PageUp equ 49h
294	Keys_PageDown equ 51h
295	Keys_GrayPlus equ 4Eh
296	Keys_GrayMinus equ 4Ah
297	Keys_Plus equ 1Bh
298	Keys_Minus equ 35h
299	Keys_ENTER equ 1Ch
300	Keys_ESC equ 1h
301	Keys_F1 equ 3Bh
302	Keys_F10 equ 44h
303	Keys_C equ 2Eh ; Add. Check for Ctrl!
304	Keys_Y equ 2Ch
305	Keys_Z equ 15h
306	Keys_N equ 31h
307	Keys_TAB equ 0Fh
308	Keys_Delete equ 53h
309	Keys_Backspace equ 0Eh
310	Keys_Space equ 20h
311
312	Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
313
314
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)
322	InitialFreeDriveletterMap equ 00000011111111111111111111111100b
323
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	;
330	MaxDisks equ 64
331
332
333
334
335
336
337	;##############################################################################
338	; AiR-BOOT / MAIN-CODE
339	;##############################################################################
340
341	;
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.
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	;
352	.286
353
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	;
363	IFDEF TASM
364	;~ .model large, basic
365	.model tiny,c
366	ENDIF
367
368	;
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.
372	; The 2-segment layout was needed for JWasm because it does not treat
373	; db ? at the end of a code segment as bss-data.
374	; Therefore, a true BSS segment is now used.
375	; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
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	;
382	SEGMENTED EQU
383
384	IFDEF SEGMENTED
385	AIRBOOT GROUP LDRIMAGE,VOLATILE
386	ENDIF
387
388	; Our code-segment starts here.
389	LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
390
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
396
397
398
399	;==============================================================================
400	; Sector 1
401	;==============================================================================
402
403	;------------------------------------------------------------------------------
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.
410	org 00000h
411	;------------------------------------------------------------------------------
412
413
414	;
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.
422	;
423
424	;
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	;
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.
434	; But there was no room to insert the CLI and of course he did not want to
435	; change the location of the AiR-BOOT signature.
436	; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
437	; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
438	;
439
440
441	; -----------------------------------------------------------------------------
442	; FIRST ENTRY-POINT
443	; -----------------------------------------------------------------------------
444	; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
445	; ######################################################
446	; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
447	; ######################################################
448	AiR_BOOT:
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
454
455	; JMP-Short -> MBR_Start
456	; Uses the 'A' from the signature as the displacement !
457	MBR_JmpOpc db 0EBh
458
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
462
463	; Total Code Sectors Count.
464	; Actual value will be inserted by FIXCODE.
465	MBR_CodeSecs db 1
466
467	; Total Code Sectors Count, dynamically calculated.
468	;~ db (code_end-$)/512
469
470	; Check-Sum for Code
471	MBR_CheckCode dw 0
472
473
474
475	; -----------------------------------------------------------------------------
476	; THIRD ENTRY-POINT
477	; -----------------------------------------------------------------------------
478	; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
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.
482	;
483	MBR_Start:
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	;
490
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	;
501	; Setup some base stuff
502	; AX got loaded wrongly for debug, changed the instructions
503	; without modifying the number of bytes.
504	; Don't comment-out the redundant instruction below because it
505	; will change the number of bytes and break the jump-chain.
506	;
507
508	; The segment we are moving ourself from (NOT USED)
509	;mov ax, StartBaseSeg
510	;mov ds, ax
511
512	; Make sure DS points to CS.
513	push cs
514	pop ds
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
519	mov es, ax
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
527
528	; Size of the MBR in words.
529	mov cx, 256 ; Pre-boot environment
530
531	;
532	; This moves this 512-byte sector, loaded by the BIOS at
533	; 0000:7c00 to 8000:0000.
534	;
535	cld
536	rep movsw
537
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
543	; Code an intersegment jump to the new location.
544	; jmp BootBaseSeg:BootBaseExec
545	; Note that DX:BX containts the old SS:SP.
546	db 0EAh
547	dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
548	dw BootBaseSeg ; This is 08000h
549
550
551
552
553	; -----------------------------------------------------------------------------
554	; SIMPLE MBR FUNCTIONS
555	; -----------------------------------------------------------------------------
556	;
557	; Some MBR-functions to provide absolute minimum functionality.
558	;
559
560	;
561	; BOOKMARK: Halt System
562	; Entry-point for halting the system.
563	;
564	MBR_HaltSystem:
565	mov ax, 8600h
566	xor cx, cx
567	mov dx, 500
568	int 15h ; Wait to display the whole screen :]
569	MBR_HaltSys:
570	;~ cli
571	jmp MBR_HaltSys
572
573
574	; Base of some MBR variables
575	ORIGIN 0003Ch
576
577	MBR_Variables:
578
579	; Comport settings.
580	; It had to be moved to create room for the double I13X signature.
581	; It cannot be in the config-area (sector 55)
582	; because that area is crc-protected and would not allow 'poking'.
583	BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
584
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.
590	BIOS_BootDisk db BIOS_BOOTDISK_DEFAULT ; Get overwritten with 'DL'
591
592	; Reserved space for future variables.
593	IFDEF AUX_DEBUG
594	reserved db 5 dup('X')
595	ELSE
596	reserved db 5 dup(0)
597	ENDIF
598
599
600
601
602	; -----------------------------------------------------------------------------
603	; SECOND ENTRY-POINT
604	; -----------------------------------------------------------------------------
605
606	;
607	; We arrive here after the first jump using the 'A' of the
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...
612	;
613	ORIGIN 00044h
614
615	; Jump again...
616	; This time to the code that relocates to 8000:0000.
617	; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
618	jmp MBR_Start
619
620	;
621	; Entry-point when loading fails.
622	;
623	db 'LOAD ERROR!', 0
624	MBR_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
631	MBR_LoadError EndP
632
633	;
634	; Entry-point when saving fails.
635	;
636	db 'SAVE ERROR!', 0
637	MBR_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
644	MBR_SaveError EndP
645
646
647	; Put text on the screen using the BIOS tele-type function.
648	; No attributes like color are supported.
649	; In: SI - Pointer to begin of string (EOS is 0)
650	; Destroyed: SI
651	MBR_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
662	MBR_Teletype EndP
663
664	;
665	; Rousseau: DO NOT ADD CODE TO THIS SECTION !
666	;
667
668	; In: BX - Base Check
669	; DS:SI - Pointer to 512-byte-area to be included
670	; Out: BX - Base Check Result
671	; Destroyed: SI will get updated (+512)
672	MBR_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
684	MBR_GetCheckOfSector EndP
685
686
687
688
689
690
691	; -----------------------------------------------------------------------------
692	; ENTRY-POINT OF MOVED CODE
693	; -----------------------------------------------------------------------------
694
695	;
696	; When we arrive here we are running at 8000:0000.
697	; CX:BX contains the SS:SP of the old stack.
698	;
699
700	;
701	; This is where the rest of AiR-BOOT gets loaded from track0.
702	;
703	; BOOKMARK: Running at relocated position (Load additional sectors)
704	;------------------------------------------------------------------------------
705	MBR_RealStart:
706	;
707	; Setup new stack and other segment registers.
708	;
709	mov ax, StackSeg ; 07000h, below the moved code
710	mov ss, ax
711	mov sp, 7FFEh ; Even is better
712	push es ; ES holds segment where we moved to
713	pop ds ; Set DS=ES to Code Segment
714
715	;
716	; Push the old SS:SP which was saved in CX:BX on the new stack.
717	;
718	push cx ; Old SS
719	push bx ; Old SP
720
721	;
722	; Store the BIOS disk-number AirBoot was loaded from.
723	;
724	mov [BIOS_BootDisk], dl
725
726	; Load the configuration-sectors from disk.
727	; These are the main configuration sector and the various
728	; tables that follow it upto but not including the MBR backup.
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
735	jnc MBR_ConfigCopy_NoError
736
737	; Some error occured
738	MBR_ConfigCopy_LoadError:
739	jmp MBR_LoadError ; Will Abort BootUp
740
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.
744	MBR_ConfigCopy_NoError:
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
751	jnc MBR_RealStart_NoError
752
753	; Some error occured
754	jmp MBR_LoadError ; Will Abort BootUp
755
756
757	; I13X Signatures
758	ORIGIN 000d0h
759
760	; [v1.05+]
761	; Signature for IBM's LVM to detect our "powerful" features ;)
762	;
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
769	;
770	; Update: These are actually MOV EAX,'X31I' instructions
771	; in the eCS LVM MBR-code. They are at different places in
772	; the v1.x and v2.x LVM MBR-code. Other code might depend on
773	; their presence. Let's protect their location.
774	db 'I13X',0,'I13X',0
775
776
777	MBR_RealStart_NoError:
778	; Now Check Code with CheckSum
779	mov si, offset FurtherMoreLoad
780
781	;movzx cx, bptr ds:[10h]
782	mov cl, ds:[10h]
783	mov ch,0
784
785	; Claculate checksum
786	xor bx, bx
787	MBR_RealStart_CheckCodeLoop:
788	call MBR_GetCheckOfSector
789	loop MBR_RealStart_CheckCodeLoop
790
791	; Verify checksum
792	cmp MBR_CheckCode, bx
793	;~ je MBR_RealStart_CheckSuccess ; CRC verified
794	jmp MBR_RealStart_CheckSuccess ; Ignore CRC
795
796	; Oops, checksum mismatch -- halt the system
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
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	;
811	MBR_RealStart_CheckSuccess:
812	jmp AiR_BOOT_Start
813
814
815
816
817
818	;------------------------------------------------------------------------------
819	include text/txtmbr.asm ; All translateable Text in MBR
820	;------------------------------------------------------------------------------
821
822	; Disk Signature
823	ORIGIN 001B8h
824
825
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.
830	; AiR-BOOT installer will merge the field
831	; from the MBR it replaces.
832	MBR_DrvSig db 'DSIG'
833
834	; Unused word at 01BCh.
835	; An LVM 2.x MBR puts 0CC33h here.
836	; AiR-BOOT installer will merge the field
837	; from the MBR it replaces.
838	MBR_Spare dw '$$'
839
840
841	; Partition Table.
842	ORIGIN 001BEh
843
844	; The 4 entries just for show.
845	; AiR-BOOT installer will merge them from the MBR it replaces.
846	MBR_PartTable:
847	db 16 dup('0')
848	db 16 dup('1')
849	db 16 dup('2')
850	db 16 dup('3')
851
852	; Boot Sigbature
853	MBR_Sig dw 0aa55h
854
855
856
857
858
859
860
861	;==============================================================================
862	; Sector 2
863	;==============================================================================
864
865	; -----------------------------------------------------------------------------
866	; FILE-SYSTEM TABLES
867	; -----------------------------------------------------------------------------
868
869	; First sector the rest of the loader image
870	ORIGIN 00200h
871
872	;
873	; Everything beyond this point is loaded on startup
874	; and is NOT existant at first
875	;
876	FurtherMoreLoad:
877
878	;
879	; Filesystem table correlating id with name.
880	;
881
882	; first Normal-Partition-ID, Hidden-Partition-ID
883	; and Default-Partition-Flags.
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
888	db 'AiRSYS-TABLE'
889	FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
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
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
902	FileSysNames 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 '
914	; -> 44 Partition-Types
915
916
917
918
919
920
921	;==============================================================================
922	; Sector 3
923	;==============================================================================
924
925	; -----------------------------------------------------------------------------
926	; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
927	; -----------------------------------------------------------------------------
928
929	; The entry-point jumped to from the MBR code
930	ORIGIN 00400h
931
932
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	;##############################################################################
942	; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
943	AiR_BOOT_Start:
944
945
946	;
947	; Enable interrupts.
948	;
949	sti
950
951	;
952	; Pop the old SS:SP from the stack and save it in the BSS.
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.
956	;
957	pop [OldSP]
958	pop [OldSS]
959
960
961	; Verify we still got the BIOS disk in DL
962	IFDEF AUX_DEBUG
963	mov ax, dx
964	call AuxIO_TeletypeHexWord
965	call AuxIO_TeletypeNL
966	mov ax, bx
967	call AuxIO_TeletypeHexWord
968	call AuxIO_TeletypeNL
969	xor ah, ah
970	mov al, [BIOS_BootDisk]
971	call AuxIO_TeletypeHexWord
972	call AuxIO_TeletypeNL
973	ENDIF
974
975	; -----------------------------------------------------------------------------
976	; IBM-BM BOOT PREPARATION
977	; -----------------------------------------------------------------------------
978	;
979	; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
980	; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
981	; signature is required at 3000:0000, FS needs to contain 3000h
982	; and the 32-bit LBA address needs to follow the 'I13X' signature.
983	; For booting IBM-BM from the second disk, a copy of the MBR of the
984	; first disk is also required at 0000:7E00.
985	; This information is derived from the eCS 2.x LVM MBR.
986	;
987	; So, now is a good time to copy the MBR of the first disk to
988	; 0000:7E00 in case the partition that will be started is IBM-BM.
989	; This copy is located at 8000:0000 and DS already points to this
990	; segment. The 'I13X' signature and FS will be setup later.
991	;
992	pusha ; Save all the general purpose regs
993	push es ; We need ES too, so save its value
994	xor ax,ax ; Segment 0000h
995	mov es,ax ; Make ES point to it
996	mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
997	mov di,7e00h ; Destination for the MBR for IBM-BM
998	mov cx,100h ; 256 words = 512 bytes
999	cld ; Direction from low to high
1000	rep movsw ; Copy the 256 words of the MBR
1001	pop es ; Restore previous value of ES
1002	popa ; Restore all the general purpose regs
1003
1004
1005	; -----------------------------------------------------------------------------
1006	; PRECRAP
1007	; -----------------------------------------------------------------------------
1008
1009	;
1010	; First it clears the BSS area.
1011	; Note that the old SS:SP is stored outside this area so this
1012	; does not get lost.
1013	; Then initialize various runtime variables and structures.
1014	;
1015	; BOOKMARK: Pre Crap
1016	call PRECRAP_Main
1017	; Number of harddisks and other system-info is now known.
1018
1019	;!
1020	;! DEBUG_BLOCK
1021	;! Let's see what the BIOS supplied us with...
1022	;! Uncomment below to activate.
1023	;!
1024	__DUMP_BIOS_REGS__ EQU
1025	IFDEF AUX_DEBUG
1026	IFDEF __DUMP_BIOS_REGS__
1027	pushf
1028	pusha
1029	; Print title.
1030	mov si,offset [bios_reg]
1031	call AuxIO_Print
1032	; Save the current stack (SS:SP).
1033	mov ax,ss
1034	mov [CurrentSS],ax
1035	mov [CurrentSP],sp
1036
1037	; Restore the old stack.
1038	mov ss,[OldSS]
1039	mov sp,[OldSP]
1040
1041	; Pop the registers with the BIOS values.
1042	popa
1043	; Push them back for AiR-BOOT restart (debug mode).
1044	pusha
1045	; Dump them to the serial-port.
1046	call DEBUG_DumpRegisters
1047	; Restore the current stack.
1048	mov ax,[CurrentSS]
1049	mov ss,ax
1050	mov sp,[CurrentSP]
1051
1052	; Restore registers.
1053	popa
1054	popf
1055	ENDIF
1056	ENDIF
1057
1058
1059	;!
1060	;! DEBUG_BLOCK
1061	;! Dump the registers at this point.
1062	;! Uncomment below to activate.
1063	;!
1064	IFDEF AUX_DEBUG
1065	;~ call DEBUG_DumpRegisters
1066	; Dump drive-letters of dl-feature before partitions are
1067	; scanned and processed.
1068	call DEBUG_DumpDriveLetters
1069	call DEBUG_DumpVolumeLetters
1070	call DEBUG_DumpPartitionXref
1071	ENDIF
1072
1073	; -----------------------------------------------------------------------------
1074	; PARTITION SCAN
1075	; -----------------------------------------------------------------------------
1076
1077
1078
1079
1080
1081
1082	;
1083	; BOOKMARK: Scan all partitions
1084	;
1085	call PARTSCAN_ScanForPartitions
1086	; Internal Partition Table is now populated.
1087
1088	;!
1089	;! DEBUG_BLOCK
1090	;! Dump various tables.
1091	;! Uncomment below to activate.
1092	;!
1093	IFDEF AUX_DEBUG
1094	;~ call DEBUG_DumpIPT
1095	;~ call DEBUG_DumpPartitionPointers
1096	;~ call DEBUG_DumpNewPartTable
1097	;~ call DEBUG_DumpDriveLetters
1098	call DEBUG_DumpDriveLetters
1099	call DEBUG_DumpVolumeLetters
1100	call DEBUG_DumpPartitionXref
1101	ENDIF
1102
1103
1104	; -----------------------------------------------------------------------------
1105	; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
1106	; -----------------------------------------------------------------------------
1107
1108	;
1109	; Reconnect forced drive-letters to their corresponding
1110	; partitions.
1111	;
1112	; BOOKMARK: Update Driveletters so they are in-sync again
1113	call PARTSCAN_UpdateDriveLetters
1114	; Driveletter <-> Partition correlation is now restored.
1115
1116
1117
1118	;!
1119	;! DEBUG_BLOCK
1120	;! Dump various tables.
1121	;! Uncomment below to activate.
1122	;!
1123	IFDEF AUX_DEBUG
1124	;~ call DEBUG_DumpIPT
1125	;~ call DEBUG_DumpPartitionPointers
1126	;~ call DEBUG_DumpNewPartTable
1127	;~ call DEBUG_DumpDriveLetters
1128	call DEBUG_DumpDriveLetters
1129	call DEBUG_DumpVolumeLetters
1130	call DEBUG_DumpPartitionXref
1131	ENDIF
1132
1133
1134	; -----------------------------------------------------------------------------
1135	; SHOW WE ARE ALIVE
1136	; -----------------------------------------------------------------------------
1137
1138	;
1139	; Put some info about AiR-BOOT and the system on the screen.
1140	;
1141
1142	; Display number of physical disks found
1143	mov si, offset DisksFound
1144	call MBR_Teletype
1145	mov al, [TotalHarddiscs]
1146	call VideoIO_SyncPos
1147	call VideoIO_PrintByteDynamicNumber
1148	xor si,si
1149	call MBR_TeletypeNL
1150
1151	; Display number of partitions found
1152	mov si, offset PartitionsFound
1153	call MBR_Teletype
1154	mov al, [CFG_Partitions]
1155	call VideoIO_SyncPos
1156	call VideoIO_PrintByteDynamicNumber
1157
1158	; Dump summier disk-info for disks found
1159	xor si,si
1160	call MBR_TeletypeNL
1161	call MBR_TeletypeNL
1162	call VideoIO_SyncPos
1163	mov dl,80h
1164	call VideoIO_DumpDiskInfo
1165
1166
1167
1168
1169
1170	; -----------------------------------------------------------------------------
1171	; eComStation PHASE1 CHECK
1172	; -----------------------------------------------------------------------------
1173
1174	;
1175	; BOOKMARK: Check for OS/2 being installed
1176	; Here we check if OS/2 is being installed.
1177	; If so, we forgo the menu and directly boot it.
1178	;
1179
1180	; If the first byte of the name of the Install Volume is not 0
1181	; then we potentially have a phase1 boot.
1182	test byte ptr [OS2_InstallVolume],0ffh
1183	; Nope, so continue normally.
1184	jz MBR_Main_ContinueBoot
1185
1186	; Setup phase1.
1187	; It is still possible that a name was set for the
1188	; Install Volume that does not exist.
1189	; In that case CY will be clear and AL=0FFh.
1190	call PART_SetupPhase1
1191	; Oops, Install Volume not found, continue normally.
1192	jnc MBR_Main_ContinueBoot
1193
1194
1195	;
1196	; == Install Volume Found ==
1197	;
1198
1199
1200	;!
1201	;! DEBUG_BLOCK
1202	;! Dump various tables.
1203	;! Uncomment below to activate.
1204	;!
1205	IFDEF AUX_DEBUG
1206	;~ call DEBUG_DumpIPT
1207	;~ call DEBUG_DumpPartitionPointers
1208	;~ call DEBUG_DumpPartitionXref
1209	;~ call DEBUG_DumpNewPartTable
1210	;~ call DEBUG_DumpDriveLetters
1211	ENDIF
1212
1213
1214	; BOOKMARK: Scan for Partitions (Only if OS/2 install going on)
1215	; Because one or more partitions are possibly added, the
1216	; PartitionXref table is not 'in sync' and could cause the
1217	; wrong system to be automatically booted.
1218	; So we rescan all partitions causing the PartitionXref
1219	; table to be filled with correct values so the auto-boot
1220	; from the new partition will work correctly.
1221	call PARTSCAN_ScanForPartitions
1222
1223
1224	;!
1225	;! DEBUG_BLOCK
1226	;! Dump various tables.
1227	;! Uncomment below to activate.
1228	;!
1229	IFDEF AUX_DEBUG
1230	;~ call DEBUG_DumpIPT
1231	;~ call DEBUG_DumpPartitionPointers
1232	;~ call DEBUG_DumpPartitionXref
1233	;~ call DEBUG_DumpNewPartTable
1234	;~ call DEBUG_DumpDriveLetters
1235	ENDIF
1236
1237	; Setup automatic boot to forgo the Menu.
1238	; PART_SetupPhase1 has filled in the other variables.
1239	mov byte ptr [CFG_AutomaticBoot],1
1240
1241	;
1242	; At this point the AiR-BOOT configuration has been altered
1243	; to automatically boot the newly installed system without
1244	; displaying the menu.
1245	; Code further down the road will take care of that.
1246	;
1247	jmp MBR_Main_ContinueBoot
1248
1249
1250
1251
1252	;
1253	; Wether a new system is being installed or not,
1254	; booting continues here.
1255	;
1256	MBR_Main_ContinueBoot:
1257
1258	;
1259	; Inform user how to switch between post-screen and menu
1260	; by putting this info on the screen.
1261	;
1262	xor si,si
1263	call MBR_TeletypeNL
1264	xor si,si
1265	call MBR_TeletypeNL
1266	call MBR_TeletypeSyncPos
1267	xor si,si
1268	call MBR_TeletypeNL
1269	call MBR_TeletypeNL
1270	mov si, offset ShowMenu
1271	call MBR_TeletypeBold
1272
1273
1274	;
1275	; Debug stop.
1276	;
1277
1278	;
1279	; ####################### WAIT FOR KEY ########################
1280	;
1281
1282	; Wait for key so we can see debug log if ab-menu hangs.
1283	;~ xor ax, ax
1284	;~ int 16h
1285	;call SOUND_Beep
1286
1287
1288	; Copy BIOS POST to Second Page
1289	mov ax, VideoIO_Page1
1290	call VideoIO_BackUpTo
1291
1292	;call SOUND_Beep
1293
1294
1295	; BOOKMARK: Save Configuration
1296	; Save configuration so phase1 boot-through is disabled
1297	; on next boot.
1298	mov byte ptr [OS2_InstallVolume], 0
1299	call DriveIO_SaveConfiguration
1300
1301
1302
1303	;
1304	; See if setup needs to be entered.
1305	;
1306	MBR_Main_ReEnterSetup:
1307	call SETUP_CheckEnterSETUP
1308
1309	;
1310	; Do some post processing.
1311	;
1312	; BOOKMARK: After Crap
1313	call AFTERCRAP_Main
1314
1315	; [Linux support removed since v1.02]
1316	; Now get FAT16-Linux Kernel Partition, If requested
1317	;cmp [CFG_LinuxKrnlPartition], 0FFh
1318	;je MBR_Main_NoLinuxKrnlPartition
1319	;call LINUX_InitFAT16access
1320	;MBR_Main_NoLinuxKrnlPartition:
1321
1322
1323
1324	MBR_Main_ReEnterBootMenuPre:
1325	; SetUp PartitionPointers for BootMenu (filter non-bootable)
1326	call PART_CalculateMenuPartPointers
1327
1328	; ...and count that one...
1329	cmp byte ptr [PartitionPointerCount], 0
1330	jne MBR_Main_SomethingBootAble
1331	mov si, offset TXT_NoBootAble
1332	call MBR_Teletype
1333	jmp MBR_HaltSystem
1334
1335	MBR_Main_SomethingBootAble:
1336	; FixUp Values, define Timed Setup booting, etc.
1337	call PART_FixUpDefaultPartitionValues
1338
1339
1340
1341	; -------------------------------------------------- BOOT-MENU
1342	MBR_Main_ReEnterBootMenu:
1343	call BOOTMENU_ResetMenuVars ; reset has to be done
1344	test byte ptr [CFG_AutomaticBoot], 1
1345	jz MBR_Main_NoAutomaticBooting
1346
1347
1348	; ------------------------------------------ AUTOMATIC BOOTING
1349	; Select automatic partition, disable automatic booting for
1350	; next time and boot system...
1351	mov byte ptr [CFG_AutomaticBoot], 0
1352	call PASSWORD_AskSystemPwd
1353	mov al, Menu_EntryAutomatic
1354
1355	;mov al, 2
1356
1357	mov Menu_EntrySelected, al ; zero based
1358	jmp MBR_Main_NoBootMenu
1359
1360
1361	MBR_Main_NoAutomaticBooting:
1362
1363	;call SOUND_Beep
1364
1365	test byte ptr [CFG_BootMenuActive], 0FFh
1366	jnz MBR_Main_GotBootMenu
1367	; ----------------------------------------------- NO BOOT-MENU
1368	; Select default partition and boot system...
1369	call PASSWORD_AskSystemPwd
1370
1371	;call VideoIO_DBG_WriteString2
1372
1373	mov al, Menu_EntryDefault
1374	;mov al,0 ; zero based
1375	mov Menu_EntrySelected, al
1376	jmp MBR_Main_NoBootMenu
1377
1378	MBR_Main_GotBootMenu:
1379	; ------------------------------------------ BOOT-MENU VISUALS
1380
1381
1382	IFDEF FX_ENABLED
1383	call FX_StartScreen
1384	ENDIF
1385
1386	; BOOKMARK: Build Main Menu
1387	call BOOTMENU_BuildBackground
1388	call BOOTMENU_BuildMain
1389
1390	IFDEF FX_ENABLED
1391	call FX_EndScreenRight
1392	ENDIF
1393
1394	call PASSWORD_AskSystemPwd
1395	call BOOTMENU_ResetTimedBoot
1396
1397	; BOOKMARK: Display Main Menu
1398	call BOOTMENU_Execute
1399
1400	jc MBR_Main_ReEnterSetup
1401	call BOOTMENU_SetVarsAfterMenu
1402
1403	; ---------------------------------------------------- BOOTING
1404	MBR_Main_NoBootMenu:
1405
1406	IFDEF FX_ENABLED
1407	call FX_StartScreen
1408	ENDIF
1409
1410	; BOOKMARK: Display bye-screen and start selected partition
1411	call BOOTMENU_BuildGoodBye
1412
1413	IFDEF FX_ENABLED
1414	call FX_EndScreenRight
1415	ENDIF
1416
1417	call PASSWORD_AskChangeBootPwd
1418
1419	call ANTIVIR_SaveBackUpMBR
1420
1421	; Preload the selected menu-entry
1422	; However, this value will be wrong if OS/2 phase1 is
1423	; active and the installation partition is newly created.
1424	; See below for the adjustment.
1425	mov dl, byte ptr [Menu_EntrySelected]
1426
1427
1428	;
1429	; Prepare to start the partition.
1430	;
1431	jmp MBR_Main_StartPartition
1432
1433
1434
1435	; -----------------------------------------------------------------------------
1436	; START PARTITION
1437	; -----------------------------------------------------------------------------
1438
1439	MBR_Main_StartPartition:
1440
1441	IFDEF AUX_DEBUG
1442	;~ call DEBUG_DumpIPT
1443	;~ call DEBUG_DumpPartitionPointers
1444	;~ call DEBUG_DumpPartitionXref
1445	;~ call DEBUG_DumpNewPartTable
1446	ENDIF
1447
1448
1449	; -------------------------------------------- START PARTITION
1450	; THIS DOES NOT RETURN !
1451	call PART_StartPartition
1452
1453
1454
1455
1456	;
1457	; This entry-point restarts AiR-BOOT almost from scratch.
1458	; It skips the movement of the MBR but otherwise it is a functional restart.
1459	; The old BIOS SS:SP where the registers on entry are stored is passed along.
1460	; This entry-point is used for debugging purposes.
1461	;
1462	; BOOKMARK: AiR-BOOT Restart (used for debugging)
1463	AirbootRestart:
1464	mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
1465	mov cx, [OldSS] ; Old SS when BIOS transferred control to AB
1466	xor dh, dh ; Head 0
1467	mov dl, [BIOS_BootDisk] ; Disk AirBoot was loaded from
1468	jmp MBR_RealStart
1469
1470
1471	;
1472	; This entry-point displays a popup that the system is halted
1473	; and then halts the system.
1474	; It is entered on severe error conditions.
1475	;
1476	; BOOKMARK: Halt System
1477	HaltSystem:
1478	call VideoIO_ClearScreen
1479	mov ax,0ababh
1480	mov cx, 0C04h
1481	mov si, offset SystemHalted
1482	call SETUP_ShowErrorBox
1483	; Halt the system.
1484	jmp MBR_HaltSystem
1485
1486
1487
1488
1489
1490
1491	;
1492	; The following section includes various assembler modules
1493	; at the source level. These contain functionality for a
1494	; multitude of categories like disk-access, video-io, lvm,
1495	; debugging, etc. Later versions of AiR-BOOT will use such
1496	; modules at the object-file level so they can be shared
1497	; more easily.
1498	;
1499
1500
1501	; -----------------------------------------------------------------------------
1502	; INCLUDED FILE SECTION
1503	; -----------------------------------------------------------------------------
1504
1505	; BOOKMARK: Include Section
1506
1507	;
1508	; Include other code-modules here.
1509	;
1510
1511	b_std_txt:
1512	include regular/std_text.asm ; Standard (non-translateable text)
1513	size_std_txt = $-b_std_txt
1514
1515	b_driveio:
1516	include regular/driveio.asm ; Drive I/O, Config Load/Save
1517	size_driveio = $-b_driveio
1518
1519	b_lvm:
1520	include special/lvm.asm ; LVM-specific code
1521	size_lvm = $-b_lvm
1522
1523	b_videoio:
1524	include regular/videoio.asm ; Video I/O
1525	size_videoio = $-b_videoio
1526
1527	b_timer:
1528	include regular/timer.asm ; Timer
1529	size_timer = $-b_timer
1530
1531	b_partmain:
1532	include regular/partmain.asm ; Regular Partition Routines
1533	size_partmain = $-b_partmain
1534
1535	b_partscan:
1536	include regular/partscan.asm ; Partition Scanning
1537	size_partscan = $-b_partscan
1538
1539	b_bootmenu:
1540	include regular/bootmenu.asm ; Boot-Menu
1541	size_bootmenu = $-b_bootmenu
1542
1543	b_password:
1544	include regular/password.asm ; Password related
1545	size_password = $-b_password
1546
1547	b_other:
1548	include regular/other.asm ; Other Routines
1549	size_other = $-b_other
1550
1551	b_main:
1552	include setup/main.asm ; The whole AiR-BOOT SETUP
1553	size_main = $-b_main
1554
1555	b_math:
1556	include regular/math.asm ; Math functions (like 32-bit multiply)
1557	size_math = $-b_math
1558
1559	b_txtother:
1560	include text/txtother.asm ; All translateable Text-Strings
1561	size_txtother = $-b_txtother
1562
1563	b_txtmenus:
1564	include text/txtmenus.asm ; All translateable Menu-text
1565	size_txtmenus = $-b_txtmenus
1566
1567	b_charset:
1568	include text/charset.asm ; Special Video Charsets (if needed)
1569	size_charset = $-b_charset
1570
1571	b_conv:
1572	include regular/conv.asm ; Various conversion routines
1573	size_conv = $-b_conv
1574
1575	b_virus:
1576	include special/virus.asm ; Virus Detection / Anti-Virus
1577	size_virus = $-b_virus
1578
1579	; [Linux support removed since v1.02]
1580	;include special/fat16.asm ; FAT-16 Support
1581	;include special/linux.asm ; Linux Kernel Support
1582
1583	b_billsuxx:
1584	include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
1585	size_billsuxx = $-b_billsuxx
1586
1587	b_sound:
1588	include special/sound.asm ; Sound
1589	size_sound = $-b_sound
1590
1591	b_apm:
1592	include special/apm.asm ; Power Managment Support
1593	size_apm = $-b_apm
1594
1595
1596
1597	;
1598	; Cyrillic support.
1599	;
1600	IFDEF TXT_IncludeCyrillic
1601	b_ccharset:
1602	include special/charset.asm ; Charset Support (e.g. Cyrillic)
1603	size_ccharset = $-b_ccharset
1604	ENDIF
1605
1606	; Various debugging routines, uses AUXIO and CONV
1607	IFDEF AUX_DEBUG
1608	b_debug:
1609	include regular/debug.asm ; Debug module
1610	size_debug = $-b_debug
1611	b_auxio:
1612	include regular/auxio.asm ; Com-port support for debugging
1613	size_auxio = $-b_auxio
1614	ENDIF
1615
1616	;
1617	; We only include this if FX_ENABLED is defined.
1618	; FX is disabled when debugging to have more room for debug-code.
1619	; The module compiles to 50eh = 1294 bytes, so that is a lot.
1620	;
1621	IFDEF FX_ENABLED
1622	b_fx:
1623	include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
1624	size_fx = $-b_fx
1625	ENDIF
1626
1627
1628	;
1629	; End of code marker.
1630	;
1631	; BOOKMARK: END OF CODE
1632	db 'BABE'
1633	db 'FACE'
1634
1635
1636	; -----------------------------------------------------------------------------
1637	; END OF CODE
1638	; -----------------------------------------------------------------------------
1639	code_end:
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650	; -----------------------------------------------------------------------------
1651	; BLDLEVEL INFORMATION
1652	; -----------------------------------------------------------------------------
1653
1654	; BOOKMARK: BLDLEVEL Information
1655	ORIGIN 068A0h
1656
1657	;
1658	; The space between this offset and code_end is the space
1659	; available for code.
1660	;
1661	zzz_code_space = $ - code_end
1662
1663
1664	bld_level:
1665	;
1666	; Here we insert the OS/2 BLDLEVEL Information.
1667	; It is composed of the AiR-BOOT version-info and other
1668	; information. It is unique for each release of AiR-BOOT.
1669	;
1670
1671	;
1672	; ?? When AUX_DEBUG is enabled and the above org is active,
1673	; the BLDLEVEL gets corrupted eventhough it gets inserted here
1674	; explicitly. The effect is almost like an 'OR' or a merge
1675	; with the already generated FX code.
1676	; Tasm and JWasm produce different results.
1677	; ??
1678	;
1679	InsertBuildLevel
1680
1681
1682
1683
1684
1685	;==============================================================================
1686	; Sector 53
1687	;==============================================================================
1688
1689	;
1690	; From here on, the layout of the image consists of:
1691	; - AiR-BOOT Protection Image
1692	; - AiR-BOOT Configuration
1693	; - DriveLetters
1694	; - Install Volume
1695	; - Floppy/CDROM/BIOS BOOT ENTRIES
1696	; - Internal Partition Table (IPT)
1697	; - Hidden Partition Table (HPT)
1698	; - MBR Backup
1699	;
1700
1701	;
1702	; After that, the BSS follows with several runtime
1703	; variables and structures.
1704	; The BSS is not part of the image on disk of course.
1705	;
1706
1707	; -----------------------------------------------------------------------------
1708	; PROTECTION IMAGE
1709	; -----------------------------------------------------------------------------
1710
1711	;
1712	; This is the AiR-BOOT MBR Protection Image.
1713	; The stuff generated here gets overwritten when the
1714	; MBR_PROT module, which is assembled separately,
1715	; gets binary merged.
1716	; So you won't find the string below in the generated binary.
1717	;
1718	; BOOKMARK: AiR-BOOT MBR Protection Image
1719	ORIGIN 06900h
1720
1721
1722
1723
1724	;
1725	; Hardcoded to 768 bytes (MBR_PROT.ASM)
1726	; The string below is searched for by the FIXCODE helper and must be
1727	; page (256 bytes) aligned.
1728	;
1729	; It seems to be possible to shrink the protection-image to 768 bytes.
1730	; That gives us an additional 256 bytes of code-space.
1731	; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
1732	; Also the granularity needs to change from 512 bytes to 256 bytes since
1733	; 6900h is not a 512-byte boundary.
1734	;
1735	; 20120908 - Done.
1736	;
1737	MBR_Protection db 'AiR-BOOT MBR-Protection Image'
1738
1739	; Just fill.
1740	;~ db 1024-($-MBR_Protection) dup('M')
1741	db 768-($-MBR_Protection) dup('M')
1742
1743
1744
1745
1746
1747
1748
1749	;==============================================================================
1750	; Sector 55
1751	;==============================================================================
1752	; -----------------------------------------------------------------------------
1753	; AiR-BOOT CONFIGURATION
1754	; -----------------------------------------------------------------------------
1755
1756	;
1757	; This section contains the AiR-BOOT configuration.
1758	; Note that it has a version that should be updated
1759	; when stuff is added.
1760	; Also add stuff to the end so that offsets of other
1761	; variables remain vaild.
1762	;
1763	; BOOKMARK: AiR-BOOT Configuration Sector
1764	ORIGIN 06C00h
1765
1766	Configuration:
1767	; This is the signature for the AiR-BOOT Configuration.
1768	; Note that this configuration section, like the code section,
1769	; is CRC protected. This means that poking values in these
1770	; sections on the disk will invalidate AiR-BOOT and cause it
1771	; to halt. This is a protection method against other software
1772	; modifying stuff in track 0.
1773	db 'AiRCFG-TABLE',0adh
1774	db 01h, 10h, 'U' ; "Compressed" ID String
1775	; Version 1.02 was for code 1.06, 1.03 was internal
1776	; and 1.04,1.05 and 1.06 do not exist.
1777	;
1778	; 1.07 was used with AB v1.07 and introduced the phase1
1779	; system-name. For the rest it is compatible with v1.02.
1780	;
1781	; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
1782	; of several components and the packing of the hideparttable.
1783	; The core configuration has not changed but the generated
1784	; configuration has. The v1.0.8 installer handles upgrading.
1785	;
1786	; It has been decided that uneven minor numbers will be
1787	; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
1788	;
1789	; It is not required for the config to have the
1790	; same version as the code, so in the future
1791	; the code version might be higher than the
1792	; config version if there are no changes to the latter.
1793	;
1794
1795	CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
1796	CFG_LastTimeEditHi dw 0 ; second 16 bit part...
1797
1798	CFG_CheckConfig dw 0 ; Check-Sum for Configuration
1799
1800	CFG_Partitions db 0 ; Count of partitions in IPT
1801	CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
1802	CFG_PartDefault db 0 ; Default-Partition (Base=0)
1803
1804	CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
1805	CFG_TimedBoot db 0 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
1806	CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
1807	CFG_TimedDelay dw 123 ; Timed Boot - Delay
1808	CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
1809	CFG_RememberBoot db 1 ; Remember Manual Boot Choice
1810	CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
1811	CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
1812	CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
1813	; v0.29+ -> 2 - Detailed Bootmenu
1814	CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
1815	CFG_PasswordSetup db 0 ; Ask Password when entering Setup
1816	CFG_PasswordSystem db 0 ; Ask Password when booting System
1817	CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
1818	CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
1819	CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
1820	CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
1821	CFG_DetectVirus db 0 ; Detect Virus ?
1822	CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
1823	CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
1824	CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
1825	CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
1826	dw 07A53h
1827	dw 0E797h
1828	dw 0A896h
1829	CFG_BootPassword dw 0101Fh ; Another CR... ;-)
1830	dw 07A53h
1831	dw 0E797h
1832	dw 0A896h
1833	db 0 ; Rude-Protection - Removed since v0.28b
1834	CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
1835	CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
1836	; 0 - Do Nothing
1837	; 1 - Reset Time
1838	; 2 - Stop Time
1839	CFG_MakeSound db 0 ; Should be clear ;)
1840	CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
1841	CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
1842	; 0 - Disabled
1843	; 1 - CD-ROM
1844	; 2 - Network
1845	; 3 - ZIP/LS120
1846	CFG_CooperBars db 0 ; If Cooper Bars should be shown
1847	CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
1848	CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
1849	; FFh -> Disabled
1850	CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
1851	CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
1852	CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
1853	CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
1854	CFG_PartAutomatic db 0 ; Partition-No for automatic booting
1855	CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
1856	CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
1857
1858
1859	;
1860	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
1861	;
1862
1863	;
1864	; Drive Letters.
1865	;
1866	; BOOKMARK: Stored Drive Letters
1867	ORIGIN 06CB0h
1868
1869
1870	; -----------------------------------------------------------------------------
1871	; DRIVE LETTERS
1872	; -----------------------------------------------------------------------------
1873
1874	;
1875	; Moved here to make room for packed hiddenparttable.
1876	; This gets filled with drive-letters that are assigned using the dl-feature.
1877	;
1878	DriveLetters db LocIPT_MaxPartitions dup (0)
1879	; Format is:
1880	;============
1881	; Drive-Letter : BYTE (80h-C:, 81h-D:)
1882	; --------------------> 1 Byte * 45
1883
1884
1885
1886	; -----------------------------------------------------------------------------
1887	; INSTALL VOLUME
1888	; -----------------------------------------------------------------------------
1889
1890	;
1891	; Allways have the name of the installation volume
1892	; at this offset.
1893	; So future config changes will not break auto-install.
1894	;
1895	; BOOKMARK: Name of OS/2 Installation Volume
1896	ORIGIN 06D00h
1897
1898	; SET(A)BOOT stores the volume name of the OS/2 system being installed here.
1899	; It is truncated to 11 chars because AiR-BOOT currently does not support
1900	; longer labelnames. The name is also capitalized.
1901	;OS2_InstallVolume db 12 dup (0)
1902	;OS2_InstallVolume db 'HIGHLOG' ,0
1903	;OS2_InstallVolume db 'ECS-MIDDLE',0,0
1904	;OS2_InstallVolume db 'ECS-HIGH',0,0,0,0
1905	;OS2_InstallVolume db 'ECS-HIGH',0,'NO',0
1906	;OS2_InstallVolume db 'KANWEG2',0
1907	OS2_InstallVolume db 0,'NOPHASEONE' ,0
1908
1909	;
1910	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
1911	;
1912
1913
1914	; -----------------------------------------------------------------------------
1915	; FLOPPY/CDROM/BIOS BOOT ENTRIES
1916	; -----------------------------------------------------------------------------
1917
1918	;
1919	; 06DABh - 06C00h = 01ABh = 427 bytes.
1920	; Entries allocated down from 06E00 boundary.
1921	;
1922	; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
1923	ORIGIN 06DABh ; 427 Boundry
1924
1925	; (432 - 5 = 427)
1926	AutoDrvLetter db 0
1927	AutoDrvLetterSerial dd 0
1928
1929	; This entry is also 34 bytes long (466 - 34 = 432)
1930	BIOScontIPTentry:
1931	db 0, 0, 0, 0, ' '
1932	db 0, 0FEh, Flags_Bootable
1933	dw 0 ; No Checksum :)
1934	db 0, 1, 0
1935	db 0, 1, 0 ; Location of Partition/Boot Record
1936	dd 0, 0
1937
1938	; VIR variables are for the AiR-BOOT Anti Virus Code
1939	; Most of them are backups of Interrupt Points, so we can check, if a
1940	; stealth virus is on-line, we can intercept its call.
1941	; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
1942	; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
1943	; system from working, so the user has to press reset.
1944	; That's saver than a Reboot.
1945	;
1946	; If a virus is found on the partition to boot, the system will ONLY halt,
1947	; nothing more, because we can not remove it. The user shall do it :)
1948	; Those viruses are detected via a real nasty method...Checksum-Checking of the
1949	; boot-record, which is to be executed. If it does not match the one in our
1950	; internal partition table, we will stop. You may however switch this detection
1951	; off or just reset it by switching 'VIBR Detection'.
1952
1953	; 478 - 12 = 466 ; 466 Sub-Part
1954	CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
1955	CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
1956	CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
1957
1958	; 478 Boundry (512-34)
1959	; This entry is also 34 bytes long
1960	FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
1961	db 0, 0FFh, Flags_Bootable
1962	dw 0 ; No Checksum :)
1963	db 0, 1, 0
1964	db 0, 1, 0 ; Location of Partition/Boot Record
1965	dd 0, 0
1966
1967
1968
1969	; -----------------------------------------------------------------------------
1970	; INTERNAL PARTITION TABLE (IPT)
1971	; -----------------------------------------------------------------------------
1972
1973	;
1974	; AiR-BOOT Internal Partition Table (IPT)
1975	;
1976	; BOOKMARK: Internal Partition Table
1977	ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
1978
1979
1980	;
1981	; Rousseau: This is the start of the AiR-BOOT IPT
1982	;
1983	PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
1984	; no-partitions detected... :]
1985	; db 1, 0, 0, 0, 'Harddisc 1'
1986	; db 0, 0FFh, Flags_BootAble
1987	; dw 0 ; No Checksum :)
1988	; db 0, 0, 1
1989	; db 0, 0, 1 ; Location of Partition/Boot Record
1990	; dd 0, 0
1991
1992	; Format is:
1993	;============
1994	; SerialNumber * 4
1995	; PartitionName * 11
1996	; Drive * 1
1997	; SystemID * 1 (means the partition type)
1998	; Flags * 1
1999	; Checksum * 2 (for virus checking)
2000	; LocationBegin * 3 (where the partition begins)
2001	; LocationPartTab * 3 (where the partition table is)
2002	; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
2003	; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
2004	; --------------------> 34 Bytes (total maximum partition-entries = 30)
2005
2006
2007
2008	; No need to check overlap here because this string will
2009	; be overwritten if the maximum partition count is reached.
2010	; So this is not a critical boundary.
2011	ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
2012
2013	db 'AiRBOOTPAR' ; 1K internal partition table
2014
2015
2016
2017	; -----------------------------------------------------------------------------
2018	; HIDDEN PARTITION TABLE (HPT)
2019	; -----------------------------------------------------------------------------
2020
2021	;
2022	; Hidden Partition Table (6-bit packed as of v1.0.8)
2023	;
2024	; BOOKMARK: Hidden Partition Table (packed)
2025	ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
2026
2027	HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
2028	; Format is:
2029	;============
2030	; PartitionPtr : BYTE * 30
2031	; --------------------> 30 Bytes * 45
2032
2033	;
2034	; Driveletters were here.
2035	; Moved down to make room for packed hideparttable.
2036	;
2037
2038
2039	;
2040	; End of hidden partition table.
2041	; Check overlap here for security reasons.
2042	;
2043	ORIGIN % (image_size - 200h - 5)
2044
2045	; 79fa - end of packed hide table
2046	db 'ABHID' ; 1K internal Hide-partition table
2047
2048
2049
2050
2051	;==============================================================================
2052	; Sector 62
2053	;==============================================================================
2054	; -----------------------------------------------------------------------------
2055	; MBR BACKUP
2056	; -----------------------------------------------------------------------------
2057
2058	;
2059	; AiR-BOOT MBR Backup.
2060	;
2061	; BOOKMARK: MBR Backup
2062	ORIGIN % (image_size - 200h)
2063
2064
2065	MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
2066	' - Just to fill this sector with something',0
2067	AirBootRocks db 'AiR-BOOT Rocks!',0
2068
2069	db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
2070
2071	; End of Image signature.
2072	;
2073	ORIGIN % (image_size - 2)
2074	dw 0BABEh
2075
2076
2077	;
2078	; End of Image.
2079	;
2080	ORIGIN % (image_size)
2081
2082
2083
2084	;
2085	; Terminate LDRIMAGE segment.
2086	;
2087	IFDEF SEGMENTED
2088	LDRIMAGE ENDS
2089	ENDIF
2090
2091
2092
2093
2094
2095
2096
2097	;##############################################################################
2098	; BSS SEGMENT
2099	;##############################################################################
2100
2101	; BOOKMARK: BSS Segment
2102
2103	;
2104	; Open BSS segment.
2105	;
2106	IFDEF SEGMENTED
2107	VOLATILE SEGMENT USE16 PUBLIC 'BSS'
2108	ENDIF
2109
2110
2111
2112	sobss:
2113	;------------------------------------------------------------------------------
2114
2115	;
2116	; Removed ORG for BSS data to be more compatible
2117	; with segment-concatenated layout.
2118	;
2119	; What happens before this space ??
2120	; If org 0 corruption occurs.
2121	;
2122
2123	;
2124	; Filling hiddenparttable goes out-of-bounds !
2125	; Fixed with 6-bit packing.
2126	;
2127
2128	;
2129	; If segmented, offsets are relative to the BSS segment.
2130	; They are resolved at link-time.
2131	; If not segmented, offsets are relative to the CODE segment.
2132	;
2133	IFDEF SEGMENTED
2134	ORG 02400h
2135	ELSE
2136	ORG 0A000h
2137	ENDIF
2138
2139
2140	; -----------------------------------------------------------------------------
2141	; START OF BSS DATA
2142	; -----------------------------------------------------------------------------
2143
2144	; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
2145	BeginOfVariables:
2146
2147
2148	; -----------------------------------------------------------------------------
2149	; SECTOR BUFFERS
2150	; -----------------------------------------------------------------------------
2151	; BOOKMARK: Sector Buffers
2152	PartitionSector db 512 dup (?) ; Temporary Sector for Partition
2153	PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
2154	LVMSector db 512 dup (?) ; Temporary Sector for LVM
2155	TmpSector db 512 dup (?) ; Temporary Sector
2156	Scratch db 512 dup (?) ; Scratch buffer
2157
2158	; -----------------------------------------------------------------------------
2159	; NEW PARTITION TABLE
2160	; -----------------------------------------------------------------------------
2161	; Everything used to build a new IPT and reference it to the old one
2162	; BOOKMARK: New Partition Table
2163	NewPartTable db 1536 dup (?) ; New Partition Table
2164
2165
2166	; -----------------------------------------------------------------------------
2167	; NEW HIDE PARTITION TABLE
2168	; -----------------------------------------------------------------------------
2169	; BOOKMARK: New Hide-Partition Table
2170	NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
2171
2172	;~ even
2173
2174	; -----------------------------------------------------------------------------
2175	; NEW DRIVE LETTERS
2176	; -----------------------------------------------------------------------------
2177	; BOOKMARK: Logical Drive-Letters
2178	NewDriveLetters db LocIPT_MaxPartitions dup (?)
2179
2180	;~ even
2181
2182	; -----------------------------------------------------------------------------
2183	; PARTITION SIZE TABLE
2184	; -----------------------------------------------------------------------------
2185	; Size-Table (6 bytes per partition)
2186	; BOOKMARK: Partition Size Table
2187	PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
2188
2189
2190	; -----------------------------------------------------------------------------
2191	; PARTITION POINTERS
2192	; -----------------------------------------------------------------------------
2193	; Maximum is 52 word entries till now
2194	; BOOKMARK: Partition Pointers
2195	PartitionPointers dw 52 dup (?)
2196
2197	; Count of total Partition Pointers
2198	PartitionPointerCount db ?
2199
2200	; -----------------------------------------------------------------------------
2201	; XREF TABLE
2202	; -----------------------------------------------------------------------------
2203
2204	; X-Reference Table (holds new partnr, index is old part nr)
2205	; BOOKMARK: Xref Table
2206	PartitionXref db LocIPT_MaxPartitions dup (?)
2207
2208	; -----------------------------------------------------------------------------
2209	; VOLUME LETTERS
2210	; -----------------------------------------------------------------------------
2211
2212	; Volume-Letters
2213	; 0 - no LVM support
2214	; 1 - LVM support, but no letter
2215	; 'C'-'Z' - assigned drive letter
2216	; BOOKMARK: Volume Drive Letters
2217	PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
2218
2219
2220
2221	; -----------------------------------------------------------------------------
2222	; MISC VARS AND FLAGS
2223	; -----------------------------------------------------------------------------
2224	; BOOKMARK: Misc Vars and Flags
2225	TotalHarddiscs db ? ; Total harddrives (by POST)
2226	LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
2227	NewPartitions db ? ; Freshly found partitions
2228	; Independent of SaveConfiguration
2229	TooManyPartitions db ? ; Non-zero if too many partitions found
2230
2231	VideoIO_Segment dw ? ; Segment for Video I/O
2232
2233	ExtendedAbsPos dd ? ; Extended Partition Absolute Position
2234	ExtendedAbsPosSet db ? ; If Absolute Position set
2235
2236	CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
2237	CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
2238	; (filled out by PreCrap)
2239	CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
2240	; (for detailed error message)
2241
2242	; [Linux support removed since v1.02]
2243	;GotLinux db ? ; 1-Linux found
2244
2245
2246	; -----------------------------------------------------------------------------
2247	; MENU RELATED VARS
2248	; -----------------------------------------------------------------------------
2249	Menu_EntrySelected db ? ; Which partition we boot this time...
2250	Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
2251	Menu_AbsoluteX db ? ; Pos where Menu stuff starts
2252	Menu_TotalParts db ? ; Copy of CFG_BootParts
2253	Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
2254	Menu_EntryDefault db ? ; Default Entry in filtered View
2255	Menu_EntryLast db ? ; LastBooted Entry in filtered View
2256	Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
2257	; - All adjusted to menu locations
2258
2259	; -----------------------------------------------------------------------------
2260	; PARTITION RELATED VARS
2261	; -----------------------------------------------------------------------------
2262	PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
2263	PartSetup_ActivePart db ? ; Active Partition
2264	PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
2265	PartSetup_HiddenX db ? ; Pos for Hidden-Setup
2266	PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
2267
2268	; -----------------------------------------------------------------------------
2269	; TIMER / SETUP RELATED VARS
2270	; -----------------------------------------------------------------------------
2271	TimedBootEnable db ? ; Local Enable/Disable for timed boot
2272	TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
2273	TimedSecondLeft db ? ; How many seconds are left till boom ?
2274	TimedSecondBack db ? ; To get a modification noticed
2275	TimedBootUsed db ? ; Timed Boot used for bootup ?
2276	FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
2277	SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
2278	SETUP_ExitEvent db ? ; Exit Event to end SETUP
2279	TempPasswordEntry db 17 dup (?)
2280	SETUP_OldPwd db 17 dup (?)
2281	SETUP_NewPwd db 17 dup (?)
2282	SETUP_VerifyPwd db 17 dup (?)
2283	StartSoundPlayed db ?
2284	ChangePartNameSave db ? ; Save label after user-edit ?
2285	SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
2286
2287
2288	; -----------------------------------------------------------------------------
2289	; FX RELATED VARS
2290	; -----------------------------------------------------------------------------
2291	FX_UseCount dw ?
2292	FX_OverallTimer dw ?
2293	FX_WideScrollerTimer dw ?
2294	FX_WideScrollerCurPos dw ?
2295	FX_WideScrollerSpeed db ?
2296	FX_WideScrollerSpeedState db ?
2297	FX_WideScrollerDirection db ?
2298	FX_WideScrollerAbsDirection db ?
2299	FX_WideScrollerBounceSpeed db ?
2300	FX_CooperBarsTimer dw ?
2301
2302	; Dynamically Generated Tables - do not need to get initialized with NUL
2303	FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
2304	FX_CooperState db 7 dup (?)
2305	FX_SinusPos db 7 dup (?)
2306	FX_CooperPos dw 7 dup (?)
2307
2308
2309	; -----------------------------------------------------------------------------
2310	; CHARSET BUFFER
2311	; -----------------------------------------------------------------------------
2312	CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
2313
2314	; -----------------------------------------------------------------------------
2315	; LVM CRC TABLE
2316	; -----------------------------------------------------------------------------
2317	LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
2318
2319	;~ ; [Linux support removed since v1.02]
2320	;~ FAT16_Drive db ? ; FAT-16: Drive of FAT16-partition
2321	;~ FAT16_AbsPartitionBegin dd ? ; FAT-16: LBA Begin of Partition
2322	;~ FAT16_SecsPerCluster db ? ; FAT-16: Sectors Per Cluster
2323	;~ FAT16_NumOfRootEntries dw ? ; FAT-16: Number of Root Entries
2324	;~ FAT16_SecsPerFAT dw ? ; FAT-16: Sectors Per FAT
2325	;~ FAT16_AbsFATBegin dd ? ; FAT-16: LBA Begin of FAT
2326	;~ FAT16_AbsRootBegin dd ? ; FAT-16: LBA Begin of Root
2327	;~ FAT16_AbsClusterBegin dd ? ; FAT-16: LBA Begin of Clusters
2328	;~ FAT16_FATCacheSector db ? ; FAT-16: FAT-Sector No in Cache
2329	;~ FAT16_FATCache db 512 dup (?) ; FAT-16: FAT-Area Cache
2330	;~ LINUX_KernelEntries db 680 dup (?) ; 34*20 -> Space for Kernel-Entries
2331	;~ LINUX_KernelNo db ? ; Total of Kernels in KernelEntries
2332	;~ LINUX_KernelSizeTable db 120 dup (?) ; Size-Table (6 bytes per kernel)
2333
2334
2335	;
2336	; Rousseau: added some stuff.
2337	;
2338	; -----------------------------------------------------------------------------
2339	; ECS PHASE1 RELATED
2340	; -----------------------------------------------------------------------------
2341	Phase1Active db ?
2342	OldPartitionCount db ?
2343
2344
2345	; -----------------------------------------------------------------------------
2346	; DISK PARAMETERS
2347	; -----------------------------------------------------------------------------
2348	;EVEN
2349	HugeDisk db MaxDisks dup(?)
2350	TrueSecs dd MaxDisks dup(?)
2351
2352	; BIOS geometry of the boot-drive
2353	; Note that heads cannot be 256 due to legacy DOS/BIOS bug
2354	; If Int13X is supported those values are used, otherwise the legacy values.
2355	BIOS_Cyls dd MaxDisks dup(?)
2356	BIOS_Heads dd MaxDisks dup(?)
2357	BIOS_Secs dd MaxDisks dup(?)
2358	BIOS_Bytes dw MaxDisks dup(?)
2359	BIOS_TotalSecs dq MaxDisks dup(?)
2360
2361	; LBA geometry of the boot-drive
2362	; Note that these values are taken from the BPB of a partition boot-record
2363	LVM_Cyls dd MaxDisks dup(?)
2364	LVM_Heads dd MaxDisks dup(?)
2365	LVM_Secs dd MaxDisks dup(?)
2366	LVM_Bytes dw MaxDisks dup(?)
2367	LVM_TotalSecs dq MaxDisks dup(?)
2368
2369	; OS/2 geometry of the boot-drive
2370	; Note that these values are taken from the BPB of a partition boot-record
2371	LOG_Cyls dd MaxDisks dup(?)
2372	LOG_Heads dd MaxDisks dup(?)
2373	LOG_Secs dd MaxDisks dup(?)
2374	LOG_Bytes dw MaxDisks dup(?)
2375	LOG_TotalSecs dq MaxDisks dup(?)
2376
2377	; Get's initialized at startup to: 00000011111111111111111111111100b
2378	; Meaning A,B not free; C-Z free, rest unused. (right to left)
2379	; Each partition with an assigned drive-letter clears a bit in this map.
2380	FreeDriveletterMap dd ?
2381
2382	; LBA address of master LVM sector, zero if non-existant
2383	MasterLVMLBA dd ?
2384
2385
2386	; -----------------------------------------------------------------------------
2387	; I13X BUFFER
2388	; -----------------------------------------------------------------------------
2389	;
2390	; BOOKMARK: Temporary buffer for 48h INT13X bios call.
2391	;
2392
2393	; Size of the buffer.
2394	; this param must be filled in.
2395	; Code inserts it.
2396	i13xbuf dw 1 dup (?)
2397
2398	; The buffer itself.
2399	db 126 dup(?)
2400
2401	; Size of buffer calculated.
2402	; (excluding the size word at the start).
2403	i13xbuf_size = $-offset i13xbuf-2
2404
2405	; Some debug area.
2406	ott db 512 dup(?)
2407
2408
2409	; End of transient variables.
2410	EndOfVariables:
2411
2412
2413
2414
2415	; -----------------------------------------------------------------------------
2416	; OLD AND NEW STACKS
2417	; -----------------------------------------------------------------------------
2418	; BOOKMARK: Storage for Old and New Stack Pointers
2419	;
2420	; These need to be outside the variable section because AiR-BOOT can restart
2421	; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
2422	; they would be cleared on AiR-BOOT restart.
2423	;
2424
2425	; The variable section is cleared word-wise, so it could clear one byte extra
2426	; depending on the alignment and size. This DD prevents the OldSP and OldSS
2427	; to be partly overwritten by the clearing routine.
2428	dd ?
2429
2430	; SS:SP from before our relocation.
2431	; The registers values when the BIOS transferred control to us were pushed
2432	; on this stack.
2433
2434	OldSP dw ?
2435	OldSS dw ?
2436
2437	; SS:SP currently in use.
2438	; They are temporarily dumped here so we can pop the resgisters from
2439	; the old stack to display them in debug mode.
2440	CurrentSP dw ?
2441	CurrentSS dw ?
2442
2443
2444
2445	;
2446	; End of BSS segment.
2447	;
2448	eobss:
2449
2450	;
2451	; Close BSS segment.
2452	;
2453	IFDEF SEGMENTED
2454	VOLATILE ENDS
2455	ELSE
2456	LDRIMAGE ENDS
2457	ENDIF
2458
2459	; BOOKMARK: End of Module
2460	END AiR_BOOT
2461

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source: trunk/bootcode/airboot.asm@ 83

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