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air-boot.asm@ 65

Last change on this file since 65 was 60, checked in by Ben Rietbroek, 10 years ago

Fixed building on Linux [v1.1.1-testing]

Of course the lowercasing broke building on Linux.
This commit fixes that.

File size: 95.0 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 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	; If ReleaseCode is not defined, it will produce debug-able code...
98	; Rousseau: This is currently not functional so don't use it !
99	; It was used to debug AiR-BOOT as a .COM file.
100	;
101	ReleaseCode equ -1
102
103
104	; -----------------------------------------------------------------------------
105	; AUX
106	; -----------------------------------------------------------------------------
107	;
108	; bits 7-5 = datarate
109	; (000=110,001=150,010=300,011=600,100=1200,101=2400,110=4800,111=9600 bps)
110	; bits 4-3 = parity
111	; (00 or 10 = none, 01 = odd, 11 = even)
112	; bit 2 = stop-bits
113	; (set = 2 stop-bits, clear = 1 stop-bit)
114	; bits 1-0 = data-bits
115	; (00 = 5, 01 = 6, 10 = 7, 11 = 8)
116	;
117
118	; 9600 bps, no parity, 1 stop-bit, 8 bits per char
119	AUX_INIT_PARMS EQU 11100011b
120
121	; Com-port for debugging, 0 is disabled
122	BIOS_COM_PORT EQU 1
123
124	; Default word value for BIOS_AuxParms variable
125	; Note that is has moved since v1.07
126	BIOS_AUXPARMS_DEFAULT EQU (AUX_INIT_PARMS SHL 8) OR BIOS_COM_PORT
127
128
129
130
131	; -----------------------------------------------------------------------------
132	; LABELS
133	; -----------------------------------------------------------------------------
134	; Address labels after code-move
135	BootBaseSeg equ 08000h ; Pre-boot, in the low 640K
136	BootBasePtr equ 0h ; We put our MBR to this location
137	BootBaseExec equ BootBasePtr+offset MBR_RealStart
138	StackSeg equ 07000h ; Put the stack below the code
139
140	; Use different addresses depending on whether in pre-boot
141	; or debug (dos) environment.
142	IFDEF ReleaseCode
143	StartBaseSeg equ 00000h ; Pre-boot, we are in low memory
144	StartBasePtr equ 07C00h ; BIOS starts our MBR at 0:7C00
145	ELSE
146	; Rousseau: where does this value come from ?
147	; Should be CS.
148	; Rectified in actual code by ignoring this value.
149	StartBaseSeg equ 03A98h ; Adjust to DOS segment
150	StartBasePtr equ 00100h ; We are a .COM file, DOS is active
151	ENDIF
152
153
154
155	; -----------------------------------------------------------------------------
156	; VIDEO
157	; -----------------------------------------------------------------------------
158	; Video pages, no INT 10h is used for menu-drawing etc.
159	VideoIO_Page0 equ 0B800h
160	VideoIO_Page1 equ 0B900h
161	VideoIO_Page2 equ 0BA00h
162	VideoIO_Page4 equ 0BC00h
163	VideoIO_FXSegment equ 0A000h
164
165	; Special line-drawing characters
166	TextChar_WinLineRight equ 0C4h ; 'Ä'
167	TextChar_WinLineDown equ 0B3h ; '³'
168	TextChar_WinRep1 equ 0D1h ; 'Ñ'
169	TextChar_WinRep2 equ 0C5h ; 'Å'
170	TextChar_WinRep3 equ 0CFh ; 'Ï'
171	TextChar_WinRep4 equ 0B5h ; 'µ'
172	TextChar_WinRep5 equ 0C6h ; 'Æ'
173	TextChar_WinRep6 equ 0D8h ; 'Ø'
174
175
176
177	; -----------------------------------------------------------------------------
178	; PARTITION TABLE
179	; -----------------------------------------------------------------------------
180	; Offsets for Partition-Entries in MBR/EBRs
181	LocBRPT_LenOfEntry equ 16 ; Length of a standard MBR or EPR entry
182	LocBRPT_Flags equ 0 ; Bootable, Hidden, etc.
183	LocBRPT_BeginCHS equ 1 ; Packed CHS value
184	LocBRPT_BeginHead equ 1 ; Start head, usually < 16
185	LocBRPT_BeginSector equ 2 ; Start sector, max 63 + cyl high bits
186	LocBRPT_BeginCylinder equ 3 ; Start cylinder 8+2 bits, max 1023
187	LocBRPT_SystemID equ 4 ; Type of system using the partition
188	LocBRPT_EndCHS equ 5 ; Packed CHS value
189	LocBRPT_EndHead equ 5 ; End head, usually < 16
190	LocBRPT_EndSector equ 6 ; End sector, max 63 + cyl high bits
191	LocBRPT_EndCylinder equ 7 ; End cylinder 8+2 bits, max 1023
192	LocBRPT_RelativeBegin equ 8 ; LBA32 address of partition
193	LocBRPT_AbsoluteLength equ 12 ; 32-bit length of partition
194
195	; Signature relative to start of MBR/EBR
196	LocBR_Magic equ 510 ; Offset of 0AA55h signature
197
198	; -----------------------------------------------------------------------------
199	; LVM RECORD
200	; -----------------------------------------------------------------------------
201	; Used as a quick compare in LVM.ASM
202	LocLVM_SignatureByte0 equ 02h
203
204	; Offsets for LVM Information Sector.
205	; These are relative to the start of the LVM sector.
206	LocLVM_SignatureStart equ 00h ; 02h,'RMBPMFD' (8 bytes)
207	LocLVM_CRC equ 08h ; CRC is a DWORD
208	LocLVM_Heads equ 1ch ; Number of heads
209	LocLVM_Secs equ 20h ; Sectors per Track
210	LocLVM_DiskName equ 24h ; Name of the disk
211	LocLVM_StartOfEntries equ 3ch ; (contains maximum of 4 entries)
212	LocLVM_LenOfEntry equ 3ch ; Length of an LVM-entry
213
214	; An LVM info-sector can contain information on max. 4 partitions.
215	; All 4 entries will be used when there 4 primary partitions defined.
216	; For logical partitions, the LVM info-sector is located below the start
217	; of the logical partition and only one LVM entry is used in that logical
218	; LVM info-sector.
219	LocLVM_MaxEntries equ 4 ; Max entries in an LVM-sector
220
221
222	; -----------------------------------------------------------------------------
223	; LVM ENTRY
224	; -----------------------------------------------------------------------------
225	; Offsets for LVM entry.
226	; These are relative to the start of the entry.
227	LocLVM_VolumeID equ 00h ; DWORD
228	LocLVM_PartitionID equ 04h ; DWORD
229	LocLVM_PartitionSize equ 08h ; DWORD
230	LocLVM_PartitionStart equ 0ch ; DWORD
231	LocLVM_OnBootMenu equ 10h ; is on IBM BM Bootmenu
232	LocLVM_Startable equ 11h ; is Startable (newly installed system)
233	LocLVM_VolumeLetter equ 12h ; Drive Letter for partition (C-Z or 0)
234	LocLVM_Unknown equ 13h ; unknown BYTE (can be used ?)
235	LocLVM_InstallLetter equ 13h ; unknown BYTE (can be used ?)
236
237	; Truncated to 11 chars when displayed in menu.
238	; MiniLVM sets both to the same value.
239	; Also, MiniLVM uses a 0-byte terminator, so the maximum length is 19d.
240	; Same goes for LocLVM_DiskName.
241	; These offsets are relative to an LVM entry.
242	LocLVM_VolumeName equ 14h ; 20 bytes
243	LocLVM_PartitionName equ 28h ; 20 bytes (Used in menu)
244
245	; LVM constants.
246	LocLVM_LabelLen equ 14h ; Length of LVM Label (Disk/Part/Vol)
247	LocLVM_DiskNameLen equ 14h ; Length of LVM DiskName
248	LocLVM_VolumeNameLen equ 14h ; Length of LVM VolumeName
249	LocLVM_PartitionNameLen equ 14h ; Length of LVM PartitionName
250
251
252	; -----------------------------------------------------------------------------
253	; AiR-BOOT IPT
254	; -----------------------------------------------------------------------------
255	; Offsets for IPT (Internal Partition Table)
256	LocIPT_MaxPartitions equ max_partitions ; 45 in v1.07+
257	LocIPT_LenOfSizeElement equ 6 ; Size of one Size-Element
258	LocIPT_LenOfIPT equ 34 ; Length of an IPT-entry
259	LocIPT_Serial equ 0 ; Serial from MBR ?
260	LocIPT_Name equ 4 ; Name from FS or LVM (part/vol)
261	LocIPT_Drive equ 15 ; Drive-ID (80h,81h)
262	LocIPT_SystemID equ 16 ; Partition-Type (06,07,etc)
263	LocIPT_Flags equ 17 ; AiR-BOOT Flags for part (see below)
264	LocIPT_BootRecordCRC equ 18 ; CRC of Boot-Record
265	LocIPT_LocationBegin equ 20 ; Begin of Partition
266	LocIPT_LocationPartTable equ 23 ; PartitionTable of Partition
267	LocIPT_AbsoluteBegin equ 26 ; Absolute Sector of Begin
268	LocIPT_AbsolutePartTable equ 30 ; Absolute Sector of PartTable
269
270
271	; AiR-BOOT IPT-Flags
272	LocIPT_DefaultFlags equ 00000011b ; Don't know if boot-able :)
273	LocIPT_DefaultNonBootFlags equ 00000010b ; VIBR Detection is always on
274
275	Flags_Bootable equ 00000001b
276	Flags_VIBR_Detection equ 00000010b
277	Flags_HideFeature equ 00000100b
278	Flags_DriveLetter equ 00001000b ; OS/2 FAT16/HPFS only
279	Flags_ExtPartMShack equ 00010000b ; Ext. Partition M$-Hack req ?
280	Flags_NoPartName equ 01000000b
281	Flags_NowFound equ 10000000b ; temp only in OldPartTable
282	Flags_SpecialMarker equ 10000000b ; temp only for HiddenSetup
283
284	FileSysFlags_BootAble equ 00000001b ; Is this Partition boot-able ?
285	FileSysFlags_FAT32 equ 00010000b ; FAT 32 specific name getting
286	FileSysFlags_NoName equ 00100000b ; No Name - use PartitionName
287	FileSysFlags_DriveLetter equ 01000000b ; DriveLetter Feature possible
288
289
290	; -----------------------------------------------------------------------------
291	; AiR-BOOT HPT
292	; -----------------------------------------------------------------------------
293	; Hidden Partition Table
294	; Length of an HPT-entry ((45 * 6 bits-per-part) / 8) * 45
295	; 33.75 = 34 bytes for HPT-entry, coincidently same as length of IPT-entry.
296	; Packed table !
297	LocHPT_LenOfHPT equ 34
298
299
300	; -----------------------------------------------------------------------------
301	; NAVIGATION KEYS
302	; -----------------------------------------------------------------------------
303	; Navigation keys
304	Keys_Up equ 48h
305	Keys_Down equ 50h
306	Keys_Left equ 4Bh
307	Keys_Right equ 4Dh
308	Keys_PageUp equ 49h
309	Keys_PageDown equ 51h
310	Keys_GrayPlus equ 4Eh
311	Keys_GrayMinus equ 4Ah
312	Keys_Plus equ 1Bh
313	Keys_Minus equ 35h
314	Keys_ENTER equ 1Ch
315	Keys_ESC equ 1h
316	Keys_F1 equ 3Bh
317	Keys_F10 equ 44h
318	Keys_C equ 2Eh ; Add. Check for Ctrl!
319	Keys_Y equ 2Ch
320	Keys_Z equ 15h
321	Keys_N equ 31h
322	Keys_TAB equ 0Fh
323	Keys_Delete equ 53h
324	Keys_Backspace equ 0Eh
325	Keys_Space equ 20h
326
327	Keys_Flags_EnterSetup equ 1100b ; Strg+Alt (AL)
328
329
330	; -----------------------------------------------------------------------------
331	; MISC
332	; -----------------------------------------------------------------------------
333	; Initial value for the FreeDriveletterMap
334	; Meaning A,B not free; C-Z free, rest unused. (right to left)
335	; Each partition with an assigned drive-letter clears a bit in this map.
336	; (Not implemented yet)
337	InitialFreeDriveletterMap equ 00000011111111111111111111111100b
338
339	;
340	; The first harddisk is BIOS coded 80h.
341	; This makes a total of 128 disks that could be supported using this coding.
342	; This value is used to store disk-information and this info is allocated
343	; in the BSS. 64 disks ought to be enough for everybody :-)
344	;
345	MaxDisks equ 64
346
347
348
349
350
351
352	;##############################################################################
353	; AiR-BOOT / MAIN-CODE
354	;##############################################################################
355
356	;
357	; Because of the TASM-bug the processor had to be changed to turn JUMPS
358	; off. Existing movzx instructions were replaced with 286 equivalent code.
359	; Out of range relative jumps have been recoded.
360	;
361	; Since version 1.0.8, JWasm is the preferred assembler and Tasm will be
362	; dropped. Also, the chances of AiR-BOOT being used on a 286-machine are
363	; very slim, so a future version will revert back to .386 and also incorporate
364	; 32-bit code. This will enable some enhanced constructs such as scaled
365	; indexing, bit-instructions, 32-bit registers and what not.
366	;
367	.286
368
369	;
370	; For Tasm, MODEL is needed for the USES directive to work.
371	; So always use a model when assembling with Tasm otherwise registers on
372	; function calls that use USES are not saved and restored.
373	; The model itself, has no real effect because we generate a binary image
374	; and not a segmented executable.
375	; For the other assemblers we define no model to get rid of the default C/C++
376	; segments for future object-linked versions of AiR-BOOT.
377	;
378	IFDEF TASM
379	;~ .model large, basic
380	.model tiny,c
381	ENDIF
382
383	;
384	; The below is used to switch between the original 1-segment (code_seg) layout
385	; and the new 2-segment (code_seg and bss_data) layout.
386	; It will be removed in future versions.
387	; The 2-segment layout was needed for JWasm because it does not treat
388	; db ? at the end of a code segment as bss-data.
389	; Therefore, a true BSS segment is now used.
390	; Both the code_seg and the bss_data are grouped to the logical AIRBOOT
391	; segment.
392	; Note that this influences the offsets in the BSS in the list-file and
393	; the wdis disassembly file (.WDA).
394	; They are now segment-relative. The true offset is resolved at link
395	; time.
396	;
397	SEGMENTED EQU
398
399	IFDEF SEGMENTED
400	AIRBOOT GROUP LDRIMAGE,VOLATILE
401	ENDIF
402
403	; Our code-segment starts here.
404	LDRIMAGE SEGMENT USE16 PUBLIC 'CODE'
405
406	IFDEF SEGMENTED
407	ASSUME CS:AIRBOOT, DS:AIRBOOT, ES:nothing, SS:nothing
408	ELSE
409	ASSUME CS:LDRIMAGE,DS:LDRIMAGE,ES:nothing, SS:nothing
410	ENDIF
411
412
413
414	;==============================================================================
415	; Sector 1
416	;==============================================================================
417
418	;------------------------------------------------------------------------------
419	; We are not a .COM file at 100h but a BINARY image
420	; of which only the 1st sector gets loaded at 0000:07c00h
421	; by the BIOS. The code in this 1st sector is position
422	; independent and moves itself to a new location at 8000:0000h.
423	; Then it jumps to a new entry-point and loads the rest of
424	; the image to the new location.
425	org 00000h
426	;------------------------------------------------------------------------------
427
428
429	;
430	; Since AiR-BOOT is a boot-loader residing in track0, the first 512 bytes
431	; have the layout of a Master Boot Record (MBR). When AiR-BOOT get's installed,
432	; the first 512 bytes of this code get's merged with the Partition Table.
433	; The rest is installed in the remaining sectors with sector 62 (LBA 61)
434	; being the last sector used by AiR-BOOT. Sector 63 is reserved for IBM LVM.
435	; The last sector used by AiR-BOOT is a copy of the MBR that AiR-BOOT makes
436	; every time a system gets booted.
437	;
438
439	;
440	; Due to the addition of an extra 'I13X' sugnature and code to preserve the
441	; values of the registers on entry, the MBR-code has become a bit messy.
442	; This will be cleaned-up in future versions.
443	;
444
445	;
446	; Martin had a short jump followed by the AiRBOOT signature at first.
447	; Then he encountered strange behaviour by some M$ operating-systems
448	; if the the first insruction was not a CLI.
449	; But there was no room to insert the CLI and of course he did not want to
450	; change the location of the AiR-BOOT signature.
451	; He solved this by inserting the M$ needed CLI at offset 0 followed by a short
452	; jump that uses the 'A' of the AiR-BOOT signature as the jump displacement.
453	;
454
455
456	; -----------------------------------------------------------------------------
457	; FIRST ENTRY-POINT
458	; -----------------------------------------------------------------------------
459	; BOOKMARK: FIRST ENTRY-POINT (Invoked by BIOS)
460	; ######################################################
461	; # ENTRY-POINT WHERE THE BIOS TRANSFERS CONTROL TO US #
462	; ######################################################
463	AiR_BOOT:
464	; Some M$ operating systems need a CLI
465	; here otherwise they will go beserk
466	; and will do funny things during
467	; boot phase, it's laughable!
468	MBR_1stOpc: cli
469
470	; JMP-Short -> MBR_Start
471	; Uses the 'A' from the signature as the displacement !
472	MBR_JmpOpc db 0EBh
473
474	; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
475	;~ db 'AiRBOOT',24h,02h,20h,12h,01h,08h,TXT_LanguageID
476	MBR_ABSig: InsertAirbootSignature TXT_LanguageID
477
478	; Total Code Sectors Count.
479	; Actual value will be inserted by FIXCODE.
480	MBR_CodeSecs db 1
481
482	; Total Code Sectors Count, dynamically calculated.
483	;~ db (code_end-$)/512
484
485	; Check-Sum for Code
486	MBR_CheckCode dw 0
487
488
489
490	; -----------------------------------------------------------------------------
491	; THIRD ENTRY-POINT
492	; -----------------------------------------------------------------------------
493	; BOOKMARK: THIRD ENTRY-POINT (Relocate code)
494	;
495	; No single instruction below should be changed, added or removed in the code
496	; below as this will cause the jump-link to go haywire.
497	;
498	MBR_Start:
499	;
500	; When we arrive here, no registers have been used yet.
501	; So, they still contain the values the BIOS left in them.
502	; We want to preserve those value's for later inspection
503	; by putting them on the stack.
504	;
505
506	; No space for this instruction here.
507	; We'll enable interrupts later.
508	;sti ; This opcode is dedicated to:
509	; =MICROSOFT JUMP DEPARTMENT=
510
511
512	; Push all registers with values provided by the BIOS
513	; on the stack.
514	pusha
515	; Temporary save SS and SP so we still have access to this
516	; stack after we have setup our own.
517	mov dx,ss
518	mov bx,sp
519
520	;
521	; Setup some base stuff
522	; AX got loaded wrongly for debug, changed the instructions
523	; without modifying the number of bytes.
524	; Don't comment-out the redundant instruction below because it
525	; will change the number of bytes and break the jump-chain.
526	;
527
528	; The segment we are moving ourself from (NOT USED)
529	;mov ax, StartBaseSeg
530	;mov ds, ax
531
532	; Make sure DS points to CS.
533	push cs
534	pop ds
535
536	; Setup the source and destination for the code move.
537	mov si, StartBasePtr ; The offset we move ourself from
538	mov ax, BootBaseSeg ; The target segment we move to
539	mov es, ax
540	;mov di, BootBasePtr ; The target offset we move to
541	; Changed the instruction to make room.
542	; So, BootBasePtr is not used !
543	; The offset in the target segment is assumed to be 0000
544	; anyway.
545	xor di,di
546	;sti
547
548	; Depending on pre-boot or debug.
549	; Note that ReleaseCode is obsolete, so we will always move
550	; 256 words; aka this sector, the MBR.
551	IFDEF ReleaseCode
552	mov cx, 256 ; Pre-boot environment
553	ELSE
554	mov cx, 32700 ; Old Debug environment (move ~64kB)
555	ENDIF
556
557	;
558	; This moves this 512-byte sector, loaded by the BIOS at
559	; 0000:7c00 to 8000:0000.
560	;
561	cld
562	rep movsw
563
564	; Code an intersegment jump to the new location.
565	; jmp BootBaseSeg:BootBaseExec
566	; Note that DX:BX containts the old SS:SP.
567	db 0EAh
568	dw BootBaseExec ; This is MBR_RealStart + BootBasePtr
569	dw BootBaseSeg ; This is 08000h
570
571
572
573
574	; -----------------------------------------------------------------------------
575	; SIMPLE MBR FUNCTIONS
576	; -----------------------------------------------------------------------------
577	;
578	; Some MBR-functions to provide absolute minimum functionality.
579	;
580
581	;
582	; BOOKMARK: Halt System
583	; Entry-point for halting the system.
584	;
585	MBR_HaltSystem:
586	mov ax, 8600h
587	xor cx, cx
588	mov dx, 500
589	int 15h ; Wait to display the whole screen :]
590	MBR_HaltSys:
591	cli
592	jmp MBR_HaltSys
593
594
595	;
596	; Some small space for variables.
597	;
598	ORIGIN 0003Ch
599
600	; Comport settings.
601	; It had to be moved to create room for the double I13X signature.
602	; It cannot be in the config-area (sector 55)
603	; because that area is crc-protected and would not allow 'poking'.
604	BIOS_AuxParms dw BIOS_AUXPARMS_DEFAULT
605
606
607	IFDEF AUX_DEBUG
608	reserved db 6 dup('X')
609	ELSE
610	reserved db 6 dup(0)
611	ENDIF
612
613
614
615
616	; -----------------------------------------------------------------------------
617	; SECOND ENTRY-POINT
618	; -----------------------------------------------------------------------------
619	;
620	; We arrive here after the first jump using the 'A' of the
621	; AiR-BOOT signature. So we ensure the jump is always at
622	; this offset. We jump here, because Martin needed to
623	; insert a CLI on start and did not want to change the
624	; AiR-BOOT signature because of Microsoft inventions...
625	;
626	ORIGIN 00044h
627
628	; Jump again...
629	; This time to the code that relocates to 8000:0000.
630	; BOOKMARK: SECOND ENTRY_POINT (Skipped over AB signature)
631	jmp MBR_Start
632
633	;
634	; Entry-point when loading fails.
635	;
636	db 'LOAD ERROR!', 0
637	MBR_LoadError Proc Near
638	mov si, offset $-12
639	push cs
640	pop ds
641	call MBR_Teletype
642	MBRLE_Halt:
643	jmp MBRLE_Halt
644	MBR_LoadError EndP
645
646	;
647	; Entry-point when saving fails.
648	;
649	db 'SAVE ERROR!', 0
650	MBR_SaveError Proc Near
651	mov si, offset $-12
652	push cs
653	pop ds
654	call MBR_Teletype
655	MBRSE_Halt:
656	jmp MBRSE_Halt
657	MBR_SaveError EndP
658
659
660	; Put text on the screen using the BIOS tele-type function.
661	; No attributes like color are supported.
662	; In: SI - Pointer to begin of string (EOS is 0)
663	; Destroyed: SI
664	MBR_Teletype Proc Near Uses ax bx cx
665	mov ah, 0Eh
666	mov bx, 7
667	MBRT_Loop:
668	lodsb
669	or al, al
670	jz MBRT_End
671	int 10h
672	jmp MBRT_Loop
673	MBRT_End:
674	ret
675	MBR_Teletype EndP
676
677	;
678	; Rousseau: DO NOT ADD CODE TO THIS SECTION !
679	;
680
681	; In: BX - Base Check
682	; DS:SI - Pointer to 512-byte-area to be included
683	; Out: BX - Base Check Result
684	; Destroyed: SI will get updated (+512)
685	MBR_GetCheckOfSector Proc Near Uses ax cx
686	mov cx, 256
687	MBRGCOS_Loop:
688	lodsw
689	xor ax, 0BABEh
690	xor bx, ax
691	loop MBRGCOS_Loop
692	or bx, bx
693	jnz MBRGCOS_NoFixUp
694	mov bx, 1 ; dont allow 0, cause 0 == empty
695	MBRGCOS_NoFixUp:
696	ret
697	MBR_GetCheckOfSector EndP
698
699
700
701
702
703
704	; -----------------------------------------------------------------------------
705	; ENTRY-POINT OF MOVED CODE
706	; -----------------------------------------------------------------------------
707
708	;
709	; When we arrive here we are running at 8000:0000.
710	; DX:BX contains the SS:SP of the old stack.
711	;
712
713	;
714	; This is where the rest of AiR-BOOT gets loaded from track0.
715	;
716	; BOOKMARK: Running at relocated position (Load additional sectors)
717	;------------------------------------------------------------------------------
718	MBR_RealStart:
719	;
720	; Setup new stack and other segment registers.
721	;
722	mov ax, StackSeg ; 07000h, below the moved code
723	mov ss, ax
724	mov sp, 7FFEh ; Even is better
725	push es ; ES holds segment where we moved to
726	pop ds ; Set DS=ES to Code Segment
727
728	;
729	; Push the old SS:SP which was saved in DX:BX on the new stack.
730	;
731	push dx ; Old SS
732	push bx ; Old SP
733
734
735	; If we are in debug-mode, all code is moved already,
736	; so we can directly jump to it.
737	; One difference is that in debug-mode, the whole .com image is
738	; loaded by dos while when air-boot is active from the MBR it
739	; does the loading itself.
740	; (This debug environment is obsolete and dis-fuctional)
741	IFNDEF ReleaseCode
742	jmp AiR_BOOT_Start
743	ENDIF
744
745	; Load the configuration-sectors from disk.
746	; These are the main configuration sector and the various
747	; tables that follow it upto but not including the MBR backup.
748	mov bx, offset Configuration
749	mov dx, 0080h ; First harddrive
750	mov cx, 0037h ; Config sector is at 55d (CHS)
751
752	; Call the i/o-part
753	call MBR_LoadConfig
754	jnc MBR_ConfigCopy_NoError
755
756	; Some error occured
757	MBR_ConfigCopy_LoadError:
758	call MBR_LoadError ; Will Abort BootUp
759
760	; Load the code sectors
761	MBR_ConfigCopy_NoError:
762	mov bx, offset FurtherMoreLoad ; Directly after MBR in mem
763	mov dx, 0080h ; First harddrive
764	mov cx, 0002h ; Start at second sector
765	mov ah, 02h ; Read sectors
766
767	; This location is in the MBR.
768	; It is filled in by the FIXCODE helper that post processes
769	; the AIRBOOT loader image after it has been built.
770	; FIXCODE also embeds the MBR protection-image.
771	mov al, ds:[10h] ; Number of code sectors
772	int 13h ; Call BIOS service
773	jnc MBR_RealStart_NoError
774	jmp MBR_ConfigCopy_LoadError
775
776
777	; [v1.05+]
778	; Signature for IBM's LVM to detect our "powerful" features ;)
779	;
780	; [v1.0.8+]
781	; Reworked MBR code to be able to create a
782	; double 'I13X' signature.
783	; MBR's created with LVM eCS v1.x have the signature at 0d5h
784	; MBR's created with LVM eCS v2.x have the signature at 0d0h
785	; See eCS bugtracker issue #3002
786	;
787	; Update: These are actually MOV EAX,'X31I' instructions
788	; in the eCS LVM MBR-code. They are at different places in
789	; the v1.x and v2.x LVM MBR-code. Other code might depend on
790	; their presence. Let's protect their location.
791	ORIGIN 000d0h
792	db 'I13X',0,'I13X',0
793
794
795	MBR_RealStart_NoError:
796	; Now Check Code with CheckSum
797	mov si, offset FurtherMoreLoad
798
799	;movzx cx, bptr ds:[10h]
800	mov cl, ds:[10h]
801	mov ch,0
802
803	; Claculate checksum
804	xor bx, bx
805	MBR_RealStart_CheckCodeLoop:
806	call MBR_GetCheckOfSector
807	loop MBR_RealStart_CheckCodeLoop
808
809
810	cmp MBR_CheckCode, bx
811	je MBR_RealStart_CheckSuccess
812
813	mov si, offset TXT_ERROR_Attention
814	call MBR_Teletype
815	mov si, offset TXT_ERROR_CheckCode
816	call MBR_Teletype
817	mov si, offset TXT_ERROR_CheckFailed
818	call MBR_Teletype
819	jmp MBR_HaltSystem
820
821
822	;
823	; OK, all loading went fine so the rest of the code
824	; is present now, so we jump to it.
825	; The old SS:SP is still on the stack.
826	;
827	MBR_RealStart_CheckSuccess:
828	jmp AiR_BOOT_Start
829
830
831
832
833
834	;------------------------------------------------------------------------------
835	include text/txtmbr.asm ; All translateable Text in MBR
836	;------------------------------------------------------------------------------
837
838
839
840	; This is an ugly kludge function to create space for the
841	; double 'I13X' signature.
842	; It loads the configuration sectors, but bx,cx and dx are not initialized
843	; in this function. That's done around line 500.
844	; Putting this few bytes here creates just enough room.
845	MBR_LoadConfig Proc Near
846	; Changed from conditional assembler to calculated value
847	; Fixes issue: #2987 -- "air-boot doesn't remember drive letter"
848	; Size of the ab-configuration in 512 byte sectors
849	mov al, (MBR_BackUpMBR - Configuration) / 200h
850	mov ah,02h
851	int 13h
852	ret
853	MBR_LoadConfig EndP
854
855
856	; Disk Signature
857	; Note that in an LVM 2.x MBR this collides
858	; with the dummy PTE that it uses to look for IBM-BM
859	; on the second harddisk.
860	ORIGIN 001B8h
861
862	; AiR-BOOT installer will merge the field
863	; from the MBR it replaces.
864	MBR_DrvSig db 'DSIG'
865
866	; Unused word at 01BCh.
867	; An LVM 2.x MBR puts 0CC33h here.
868	; AiR-BOOT installer will merge the field
869	; from the MBR it replaces.
870	MBR_Spare dw '$$'
871
872
873	;
874	; Partition Table.
875	;
876	ORIGIN 001BEh
877
878	; The 4 entries just for show.
879	; AiR-BOOT installer will merge them from the MBR it replaces.
880	MBR_PartTable:
881	db 16 dup('0')
882	db 16 dup('1')
883	db 16 dup('2')
884	db 16 dup('3')
885
886	; Boot Sigbature
887	MBR_Sig dw 0aa55h
888
889
890
891
892
893
894
895	;==============================================================================
896	; Sector 2
897	;==============================================================================
898
899	; -----------------------------------------------------------------------------
900	; FILE-SYSTEM TABLES
901	; -----------------------------------------------------------------------------
902
903
904	ORIGIN 00200h
905
906	;
907	; Everything beyond this point is loaded on startup
908	; and is NOT existant at first
909	;
910	FurtherMoreLoad:
911
912	;
913	; Filesystem table correlating id with name.
914	;
915
916	; first Normal-Partition-ID, Hidden-Partition-ID
917	; and Default-Partition-Flags.
918	; 01h -> Boot-Able
919	; 10h -> FAT32 - Name Getting Scheme
920	; 20h -> No Name To Get (use Partition Name from IPT)
921	; 40h -> 'L' flag possible
922	db 'AiRSYS-TABLE'
923	FileSysIDs db 01h, 11h,01h, 04h,014h,01h, 06h,016h,41h, 0Eh,00Eh,01h
924	db 07h, 17h,41h, 08h,017h,21h, 35h,035h,20h,0FCh,017h,41h
925	db 09h, 19h,11h, 0Bh,01Bh,11h, 0Ch,01Ch,11h,0EBh,0EBh,01h
926	db 63h, 63h,21h, 81h,081h,21h, 83h,083h,21h, 40h,040h,21h
927	db 0A5h,0A5h,21h,0A6h,0A6h,21h, 82h,082h,20h,0A7h,0A7h,21h
928	db 63h, 63h,21h, 4Dh,04Dh,21h, 4Eh,04Eh,21h, 4Fh,04Fh,21h
929	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
930	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
931	db 01h, 01h,01h, 01h,001h,01h, 01h,001h,01h, 01h,001h,01h
932	db 01h, 01h,01h,0FDh,0FDh,20h, 84h,084h,20h,0A0h,0A0h,20h
933	db 0Ah, 0Ah,20h,0FEh,0FEh,21h,0FFh,0FFh,21h, 00h,000h,21h
934	db 16 dup (0)
935
936	FileSysNames db 'FAT12 ', 'FAT16 ', 'FAT16Big', 'FAT16Big'
937	db 'HPFS ', 'NTFS ', 'LVM-Data', 'JFS '
938	db 'FAT32 ', 'FAT32 ', 'FAT32 ', 'BeOS '
939	db 'Unix ', 'Minix ', 'Linux ', 'Venix ' ; x row ;)
940	db 'BSD/386 ', 'OpenBSD ', 'LinuxSwp', 'NeXTSTEP'
941	db 'GNU HURD', 'QNX ', 'QNX ', 'QNX '
942	db ' ', ' ', ' ', ' '
943	db ' ', ' ', ' ', ' '
944	db ' ', ' ', ' ', ' '
945	db ' ', 'Kernel ', ' ', '0V-Award'
946	; db 'OS/2 Man', 'via BIOS', 'Floppy ', 'Unknown '
947	db 'OS2-BMGR', 'via BIOS', 'Floppy ', 'Unknown '
948	; -> 44 Partition-Types
949
950
951
952
953
954
955	;==============================================================================
956	; Sector 3
957	;==============================================================================
958
959	; -----------------------------------------------------------------------------
960	; ENTRY-POINT AFTER LOADING THE REST OF THE CODE
961	; -----------------------------------------------------------------------------
962
963	ORIGIN 00400h
964
965
966	; ############################################
967	; # ENTRY-POINT AFTER ALL THE INITIAL HASSLE #
968	; ############################################
969	; BOOKMARK: AiR_BOOT_Start (AiR-BOOT now completely loaded)
970	AiR_BOOT_Start:
971
972
973	;
974	; Enable interrupts.
975	;
976	sti
977
978	;
979	; Pop the old SS:SP from the stack and save it in the BSS.
980	; Note that this is outside the normal variable area that gets cleared.
981	; This allows AiR-BOOT to restart itself when debugging and come-up
982	; with access to the original values of registers the BIOS passed.
983	;
984	pop [OldSP]
985	pop [OldSS]
986
987
988	; -----------------------------------------------------------------------------
989	; IBM-BM BOOT PREPARATION
990	; -----------------------------------------------------------------------------
991	;
992	; Since v1.0.8, AiR-BOOT is able to chainload IBM-BM.
993	; When IBM-BM resides above the 1024-cylinder limit, the 'I13X'
994	; signature is required at 3000:0000, FS needs to contain 3000h
995	; and the 32-bit LBA address needs to follow the 'I13X' signature.
996	; For booting IBM-BM from the second disk, a copy of the MBR of the
997	; first disk is also required at 0000:7E00.
998	; This information is derived from the eCS 2.x LVM MBR.
999	;
1000	; So, now is a good time to copy the MBR of the first disk to
1001	; 0000:7E00 in case the partition that will be started is IBM-BM.
1002	; This copy is located at 8000:0000 and DS already points to this
1003	; segment. The 'I13X' signature and FS will be setup later.
1004	;
1005	pusha ; Save all the general purpose regs
1006	push es ; We need ES too, so save its value
1007	xor ax,ax ; Segment 0000h
1008	mov es,ax ; Make ES point to it
1009	mov si,offset BootBasePtr ; Start of AiR-BOOT which has the MBR
1010	mov di,7e00h ; Destination for the MBR for IBM-BM
1011	mov cx,100h ; 256 words = 512 bytes
1012	cld ; Direction from low to high
1013	rep movsw ; Copy the 256 words of the MBR
1014	pop es ; Restore previous value of ES
1015	popa ; Restore all the general purpose regs
1016
1017
1018	; -----------------------------------------------------------------------------
1019	; PRECRAP
1020	; -----------------------------------------------------------------------------
1021
1022	;
1023	; First it clears the BSS area.
1024	; Note that the old SS:SP is stored outside this area so this
1025	; does not get lost.
1026	; Then initialize various runtime variables and structures.
1027	;
1028	; BOOKMARK: Pre Crap
1029	call PRECRAP_Main
1030	; Number of harddisks and other system-info is now known.
1031
1032	;!
1033	;! DEBUG_BLOCK
1034	;! Let's see what the BIOS supplied us with...
1035	;! Uncomment below to activate.
1036	;!
1037	__DUMP_BIOS_REGS__ EQU
1038	IFDEF AUX_DEBUG
1039	IFDEF __DUMP_BIOS_REGS__
1040	pushf
1041	pusha
1042	; Print title.
1043	mov si,offset [bios_reg]
1044	call AuxIO_Print
1045	; Save the current stack (SS:SP).
1046	mov ax,ss
1047	mov [CurrentSS],ax
1048	mov [CurrentSP],sp
1049
1050	; Restore the old stack.
1051	mov ss,[OldSS]
1052	mov sp,[OldSP]
1053
1054	; Pop the registers with the BIOS values.
1055	popa
1056	; Push them back for AiR-BOOT restart (debug mode).
1057	pusha
1058	; Dump them to the serial-port.
1059	call DEBUG_DumpRegisters
1060	; Restore the current stack.
1061	mov ax,[CurrentSS]
1062	mov ss,ax
1063	mov sp,[CurrentSP]
1064
1065	; Restore registers.
1066	popa
1067	popf
1068	ENDIF
1069	ENDIF
1070
1071
1072
1073
1074	;!
1075	;! DEBUG_BLOCK
1076	;! Dump the registers at this point.
1077	;! Uncomment below to activate.
1078	;!
1079	IFDEF AUX_DEBUG
1080	;~ call DEBUG_DumpRegisters
1081	; Dump drive-letters of dl-feature before partitions are
1082	; scanned and processed.
1083	call DEBUG_DumpDriveLetters
1084	call DEBUG_DumpVolumeLetters
1085	call DEBUG_DumpPartitionXref
1086	ENDIF
1087
1088	; -----------------------------------------------------------------------------
1089	; PARTITION SCAN
1090	; -----------------------------------------------------------------------------
1091	;
1092	; BOOKMARK: Scan all partitions
1093	;
1094	call PARTSCAN_ScanForPartitions
1095	; Internal Partition Table is now populated.
1096
1097	;!
1098	;! DEBUG_BLOCK
1099	;! Dump various tables.
1100	;! Uncomment below to activate.
1101	;!
1102	IFDEF AUX_DEBUG
1103	;~ call DEBUG_DumpIPT
1104	;~ call DEBUG_DumpPartitionPointers
1105	;~ call DEBUG_DumpNewPartTable
1106	;~ call DEBUG_DumpDriveLetters
1107	call DEBUG_DumpDriveLetters
1108	call DEBUG_DumpVolumeLetters
1109	call DEBUG_DumpPartitionXref
1110	ENDIF
1111
1112
1113	; -----------------------------------------------------------------------------
1114	; RESTORE FORCED DRIVELETTER CORRELATION [LVM]
1115	; -----------------------------------------------------------------------------
1116
1117	;
1118	; Reconnect forced drive-letters to their corresponding
1119	; partitions.
1120	;
1121	; BOOKMARK: Update Driveletters so they are in-sync again
1122	call PARTSCAN_UpdateDriveLetters
1123	; Driveletter <-> Partition correlation is now restored.
1124
1125
1126
1127	;!
1128	;! DEBUG_BLOCK
1129	;! Dump various tables.
1130	;! Uncomment below to activate.
1131	;!
1132	IFDEF AUX_DEBUG
1133	;~ call DEBUG_DumpIPT
1134	;~ call DEBUG_DumpPartitionPointers
1135	;~ call DEBUG_DumpNewPartTable
1136	;~ call DEBUG_DumpDriveLetters
1137	call DEBUG_DumpDriveLetters
1138	call DEBUG_DumpVolumeLetters
1139	call DEBUG_DumpPartitionXref
1140	ENDIF
1141
1142
1143	; -----------------------------------------------------------------------------
1144	; SHOW WE ARE ALIVE
1145	; -----------------------------------------------------------------------------
1146
1147	;
1148	; Put some info about AiR-BOOT and the system on the screen.
1149	;
1150
1151	; Display number of physical disks found
1152	mov si, offset DisksFound
1153	call MBR_Teletype
1154	mov al, [TotalHarddiscs]
1155	call VideoIO_SyncPos
1156	call VideoIO_PrintByteDynamicNumber
1157	xor si,si
1158	call MBR_TeletypeNL
1159
1160	; Display number of partitions found
1161	mov si, offset PartitionsFound
1162	call MBR_Teletype
1163	mov al, [CFG_Partitions]
1164	call VideoIO_SyncPos
1165	call VideoIO_PrintByteDynamicNumber
1166
1167	; Dump summier disk-info for disks found
1168	xor si,si
1169	call MBR_TeletypeNL
1170	call MBR_TeletypeNL
1171	call VideoIO_SyncPos
1172	mov dl,80h
1173	call VideoIO_DumpDiskInfo
1174
1175
1176
1177
1178
1179	; -----------------------------------------------------------------------------
1180	; eComStation PHASE1 CHECK
1181	; -----------------------------------------------------------------------------
1182
1183	;
1184	; BOOKMARK: Check for eCS being installed
1185	; Here we check if eComStation v2.1+ is being installed.
1186	; If so, we forgo the menu and directly boot it.
1187	;
1188
1189	; If the first byte of the name of the Install Volume is not 0
1190	; then we potentially have a phase1 boot.
1191	test byte ptr [eCS_InstallVolume],0ffh
1192	; Nope, so continue normally.
1193	jz MBR_Main_ContinueBoot
1194
1195	; Setup phase1.
1196	; It is still possible that a name was set for the
1197	; Install Volume that does not exist.
1198	; In that case CY will be clear and AL=0FFh.
1199	call PART_SetupPhase1
1200	; Oops, Install Volume not found, continue normally.
1201	jnc MBR_Main_ContinueBoot
1202
1203
1204	;
1205	; == Install Volume Found ==
1206	;
1207
1208
1209	;!
1210	;! DEBUG_BLOCK
1211	;! Dump various tables.
1212	;! Uncomment below to activate.
1213	;!
1214	IFDEF AUX_DEBUG
1215	;~ call DEBUG_DumpIPT
1216	;~ call DEBUG_DumpPartitionPointers
1217	;~ call DEBUG_DumpPartitionXref
1218	;~ call DEBUG_DumpNewPartTable
1219	;~ call DEBUG_DumpDriveLetters
1220	ENDIF
1221
1222
1223	; BOOKMARK: Scan for Partitions (Only if eCS install going on)
1224	; Because one or more partitions are possibly added, the
1225	; PartitionXref table is not 'in sync' and could cause the
1226	; wrong system to be automatically booted.
1227	; So we rescan all partitions causing the PartitionXref
1228	; table to be filled with correct values so the auto-boot
1229	; from the new partition will work correctly.
1230	call PARTSCAN_ScanForPartitions
1231
1232
1233	;!
1234	;! DEBUG_BLOCK
1235	;! Dump various tables.
1236	;! Uncomment below to activate.
1237	;!
1238	IFDEF AUX_DEBUG
1239	;~ call DEBUG_DumpIPT
1240	;~ call DEBUG_DumpPartitionPointers
1241	;~ call DEBUG_DumpPartitionXref
1242	;~ call DEBUG_DumpNewPartTable
1243	;~ call DEBUG_DumpDriveLetters
1244	ENDIF
1245
1246	; Setup automatic boot to forgo the Menu.
1247	; PART_SetupPhase1 has filled in the other variables.
1248	mov byte ptr [CFG_AutomaticBoot],1
1249
1250	;
1251	; At this point the AiR-BOOT configuration has been altered
1252	; to automatically boot the newly installed system without
1253	; displaying the menu.
1254	; Code further down the road will take care of that.
1255	;
1256	jmp MBR_Main_ContinueBoot
1257
1258
1259
1260
1261	;
1262	; Wether a new system is being installed or not,
1263	; booting continues here.
1264	;
1265	MBR_Main_ContinueBoot:
1266
1267	;
1268	; Inform user how to switch between post-screen and menu
1269	; by putting this info on the screen.
1270	;
1271	xor si,si
1272	call MBR_TeletypeNL
1273	xor si,si
1274	call MBR_TeletypeNL
1275	call MBR_TeletypeSyncPos
1276	xor si,si
1277	call MBR_TeletypeNL
1278	call MBR_TeletypeNL
1279	mov si, offset ShowMenu
1280	call MBR_TeletypeBold
1281
1282
1283	;
1284	; Debug stop.
1285	;
1286
1287	;
1288	; ####################### WAIT FOR KEY ########################
1289	;
1290
1291	; Wait for key so we can see debug log if ab-menu hangs.
1292	;~ xor ax, ax
1293	;~ int 16h
1294	;call SOUND_Beep
1295
1296
1297	; Copy BIOS POST to Second Page
1298	mov ax, VideoIO_Page1
1299	call VideoIO_BackUpTo
1300
1301	;call SOUND_Beep
1302
1303
1304	; BOOKMARK: Save Configuration
1305	; Save configuration so phase1 boot-through is disabled
1306	; on next boot.
1307	mov byte ptr [eCS_InstallVolume], 0
1308	call DriveIO_SaveConfiguration
1309
1310
1311
1312	;
1313	; See if setup needs to be entered.
1314	;
1315	MBR_Main_ReEnterSetup:
1316	call SETUP_CheckEnterSETUP
1317
1318	;
1319	; Do some post processing.
1320	;
1321	; BOOKMARK: After Crap
1322	call AFTERCRAP_Main
1323
1324	; [Linux support removed since v1.02]
1325	; Now get FAT16-Linux Kernel Partition, If requested
1326	;cmp [CFG_LinuxKrnlPartition], 0FFh
1327	;je MBR_Main_NoLinuxKrnlPartition
1328	;call LINUX_InitFAT16access
1329	;MBR_Main_NoLinuxKrnlPartition:
1330
1331
1332
1333	MBR_Main_ReEnterBootMenuPre:
1334	; SetUp PartitionPointers for BootMenu (filter non-bootable)
1335	call PART_CalculateMenuPartPointers
1336
1337	; ...and count that one...
1338	cmp byte ptr [PartitionPointerCount], 0
1339	jne MBR_Main_SomethingBootAble
1340	mov si, offset TXT_NoBootAble
1341	call MBR_Teletype
1342	jmp MBR_HaltSystem
1343
1344	MBR_Main_SomethingBootAble:
1345	; FixUp Values, define Timed Setup booting, etc.
1346	call PART_FixUpDefaultPartitionValues
1347
1348
1349
1350	; -------------------------------------------------- BOOT-MENU
1351	MBR_Main_ReEnterBootMenu:
1352	call BOOTMENU_ResetMenuVars ; reset has to be done
1353	test byte ptr [CFG_AutomaticBoot], 1
1354	jz MBR_Main_NoAutomaticBooting
1355
1356
1357	; ------------------------------------------ AUTOMATIC BOOTING
1358	; Select automatic partition, disable automatic booting for
1359	; next time and boot system...
1360	mov byte ptr [CFG_AutomaticBoot], 0
1361	call PASSWORD_AskSystemPwd
1362	mov al, Menu_EntryAutomatic
1363
1364	;mov al, 2
1365
1366	mov Menu_EntrySelected, al ; zero based
1367	jmp MBR_Main_NoBootMenu
1368
1369
1370	MBR_Main_NoAutomaticBooting:
1371
1372	;call SOUND_Beep
1373
1374	test byte ptr [CFG_BootMenuActive], 0FFh
1375	jnz MBR_Main_GotBootMenu
1376	; ----------------------------------------------- NO BOOT-MENU
1377	; Select default partition and boot system...
1378	call PASSWORD_AskSystemPwd
1379
1380	;call VideoIO_DBG_WriteString2
1381
1382	mov al, Menu_EntryDefault
1383	;mov al,0 ; zero based
1384	mov Menu_EntrySelected, al
1385	jmp MBR_Main_NoBootMenu
1386
1387	MBR_Main_GotBootMenu:
1388	; ------------------------------------------ BOOT-MENU VISUALS
1389
1390
1391	IFDEF FX_ENABLED
1392	call FX_StartScreen
1393	ENDIF
1394
1395	; BOOKMARK: Build Main Menu
1396	call BOOTMENU_BuildBackground
1397	call BOOTMENU_BuildMain
1398
1399	IFDEF FX_ENABLED
1400	call FX_EndScreenRight
1401	ENDIF
1402
1403	call PASSWORD_AskSystemPwd
1404	call BOOTMENU_ResetTimedBoot
1405
1406	; BOOKMARK: Display Main Menu
1407	call BOOTMENU_Execute
1408
1409	jc MBR_Main_ReEnterSetup
1410	call BOOTMENU_SetVarsAfterMenu
1411
1412	; ---------------------------------------------------- BOOTING
1413	MBR_Main_NoBootMenu:
1414
1415	IFDEF FX_ENABLED
1416	call FX_StartScreen
1417	ENDIF
1418
1419	; BOOKMARK: Display bye-screen and start selected partition
1420	call BOOTMENU_BuildGoodBye
1421
1422	IFDEF FX_ENABLED
1423	call FX_EndScreenRight
1424	ENDIF
1425
1426	call PASSWORD_AskChangeBootPwd
1427
1428	IFNDEF ReleaseCode
1429	; Debug Code to terminate DOS .COM program - used for
1430	; testing AiR-BOOT
1431	; Obsolete.
1432	int 3
1433	mov ax, 6200h
1434	int 21h
1435	mov es, bx
1436	mov ax, 4C00h ; Quit program
1437	int 21h
1438	ENDIF
1439	call ANTIVIR_SaveBackUpMBR
1440
1441	; Preload the selected menu-entry
1442	; However, this value will be wrong if eCS phase1 is
1443	; active and the installation partition is newly created.
1444	; See below for the adjustment.
1445	mov dl, byte ptr [Menu_EntrySelected]
1446
1447
1448	;
1449	; Prepare to start the partition.
1450	;
1451	jmp MBR_Main_StartPartition
1452
1453
1454
1455	; -----------------------------------------------------------------------------
1456	; START PARTITION
1457	; -----------------------------------------------------------------------------
1458
1459	MBR_Main_StartPartition:
1460
1461	IFDEF AUX_DEBUG
1462	;~ call DEBUG_DumpIPT
1463	;~ call DEBUG_DumpPartitionPointers
1464	;~ call DEBUG_DumpPartitionXref
1465	;~ call DEBUG_DumpNewPartTable
1466	ENDIF
1467
1468
1469	; -------------------------------------------- START PARTITION
1470	; THIS DOES NOT RETURN !
1471	call PART_StartPartition
1472
1473
1474
1475
1476	;
1477	; This entry-point restarts AiR-BOOT almost from scratch.
1478	; It skips the movement of the MBR but otherwise it is a functional restart.
1479	; The old BIOS SS:SP where the registers on entry are stored is passed along.
1480	; This entry-point is used for debugging purposes.
1481	;
1482	; BOOKMARK: AiR-BOOT Restart (used for debugging)
1483	AirbootRestart:
1484	mov bx, [OldSP] ; Old SP when BIOS transferred control to AB
1485	mov dx, [OldSS] ; Old SS when BIOS transferred control to AB
1486	jmp MBR_RealStart
1487
1488
1489	;
1490	; This entry-point displays a popup that the system is halted
1491	; and then halts the system.
1492	; It is entered on severe error conditions.
1493	;
1494	; BOOKMARK: Halt System
1495	HaltSystem:
1496	call VideoIO_ClearScreen
1497	mov ax,0ababh
1498	mov cx, 0C04h
1499	mov si, offset SystemHalted
1500	call SETUP_ShowErrorBox
1501	; Halt the system.
1502	jmp MBR_HaltSystem
1503
1504
1505
1506
1507
1508
1509	;
1510	; The following section includes various assembler modules
1511	; at the source level. These contain functionality for a
1512	; multitude of categories like disk-access, video-io, lvm,
1513	; debugging, etc. Later versions of AiR-BOOT will use such
1514	; modules at the object-file level so they can be shared
1515	; more easily.
1516	;
1517
1518
1519	; -----------------------------------------------------------------------------
1520	; INCLUDED FILE SECTION
1521	; -----------------------------------------------------------------------------
1522
1523	; BOOKMARK: Include Section
1524
1525	;
1526	; Include other code-modules here.
1527	;
1528
1529	b_std_txt:
1530	include regular/std_text.asm ; Standard (non-translateable text)
1531	size_std_txt = $-b_std_txt
1532
1533	b_driveio:
1534	include regular/driveio.asm ; Drive I/O, Config Load/Save
1535	size_driveio = $-b_driveio
1536
1537	b_lvm:
1538	include special/lvm.asm ; LVM-specific code
1539	size_lvm = $-b_lvm
1540
1541	b_videoio:
1542	include regular/videoio.asm ; Video I/O
1543	size_videoio = $-b_videoio
1544
1545	b_timer:
1546	include regular/timer.asm ; Timer
1547	size_timer = $-b_timer
1548
1549	b_partmain:
1550	include regular/partmain.asm ; Regular Partition Routines
1551	size_partmain = $-b_partmain
1552
1553	b_partscan:
1554	include regular/partscan.asm ; Partition Scanning
1555	size_partscan = $-b_partscan
1556
1557	b_bootmenu:
1558	include regular/bootmenu.asm ; Boot-Menu
1559	size_bootmenu = $-b_bootmenu
1560
1561	b_password:
1562	include regular/password.asm ; Password related
1563	size_password = $-b_password
1564
1565	b_other:
1566	include regular/other.asm ; Other Routines
1567	size_other = $-b_other
1568
1569	b_main:
1570	include setup/main.asm ; The whole AiR-BOOT SETUP
1571	size_main = $-b_main
1572
1573	b_math:
1574	include regular/math.asm ; Math functions (like 32-bit multiply)
1575	size_math = $-b_math
1576
1577	b_txtother:
1578	include text/txtother.asm ; All translateable Text-Strings
1579	size_txtother = $-b_txtother
1580
1581	b_txtmenus:
1582	include text/txtmenus.asm ; All translateable Menu-text
1583	size_txtmenus = $-b_txtmenus
1584
1585	b_charset:
1586	include text/charset.asm ; Special Video Charsets (if needed)
1587	size_charset = $-b_charset
1588
1589	b_conv:
1590	include regular/conv.asm ; Various conversion routines
1591	size_conv = $-b_conv
1592
1593	b_virus:
1594	include special/virus.asm ; Virus Detection / Anti-Virus
1595	size_virus = $-b_virus
1596
1597	; [Linux support removed since v1.02]
1598	;include special/fat16.asm ; FAT-16 Support
1599	;include special/linux.asm ; Linux Kernel Support
1600
1601	b_billsuxx:
1602	include special/f00k/billsuxx.asm ; Extended Partition - Microsoft-Hack
1603	size_billsuxx = $-b_billsuxx
1604
1605	b_sound:
1606	include special/sound.asm ; Sound
1607	size_sound = $-b_sound
1608
1609	b_apm:
1610	include special/apm.asm ; Power Managment Support
1611	size_apm = $-b_apm
1612
1613
1614
1615	;
1616	; Cyrillic support.
1617	;
1618	IFDEF TXT_IncludeCyrillic
1619	b_ccharset:
1620	include special/charset.asm ; Charset Support (e.g. Cyrillic)
1621	size_ccharset = $-b_ccharset
1622	ENDIF
1623
1624	; Various debugging routines, uses AUXIO and CONV
1625	IFDEF AUX_DEBUG
1626	b_debug:
1627	include regular/debug.asm ; Debug module
1628	size_debug = $-b_debug
1629	b_auxio:
1630	include regular/auxio.asm ; Com-port support for debugging
1631	size_auxio = $-b_auxio
1632	ENDIF
1633
1634	;
1635	; We only include this if FX_ENABLED is defined.
1636	; FX is disabled when debugging to have more room for debug-code.
1637	; The module compiles to 50eh = 1294 bytes, so that is a lot.
1638	;
1639	IFDEF FX_ENABLED
1640	b_fx:
1641	include special/fx.asm ; l33t Cooper-Bars/Scrolling <bg>
1642	size_fx = $-b_fx
1643	ENDIF
1644
1645
1646	;
1647	; End of code marker.
1648	;
1649	; BOOKMARK: END OF CODE
1650	db 'BABE'
1651	db 'FACE'
1652
1653
1654	; -----------------------------------------------------------------------------
1655	; END OF CODE
1656	; -----------------------------------------------------------------------------
1657	code_end:
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668	; -----------------------------------------------------------------------------
1669	; BLDLEVEL INFORMATION
1670	; -----------------------------------------------------------------------------
1671
1672	; BOOKMARK: BLDLEVEL Information
1673	ORIGIN 068A0h
1674
1675	;
1676	; The space between this offset and code_end is the space
1677	; available for code.
1678	;
1679	zzz_code_space = $ - code_end
1680
1681
1682	bld_level:
1683	;
1684	; Here we insert the OS/2 BLDLEVEL Information.
1685	; It is composed of the AiR-BOOT version-info and other
1686	; information. It is unique for each release of AiR-BOOT.
1687	;
1688
1689	;
1690	; ?? When AUX_DEBUG is enabled and the above org is active,
1691	; the BLDLEVEL gets corrupted eventhough it gets inserted here
1692	; explicitly. The effect is almost like an 'OR' or a merge
1693	; with the already generated FX code.
1694	; Tasm and JWasm produce different results.
1695	; ??
1696	;
1697	InsertBuildLevel
1698
1699
1700
1701
1702
1703	;==============================================================================
1704	; Sector 53
1705	;==============================================================================
1706
1707	;
1708	; From here on, the layout of the image consists of:
1709	; - AiR-BOOT Protection Image
1710	; - AiR-BOOT Configuration
1711	; - DriveLetters
1712	; - Install Volume
1713	; - Floppy/CDROM/BIOS BOOT ENTRIES
1714	; - Internal Partition Table (IPT)
1715	; - Hidden Partition Table (HPT)
1716	; - MBR Backup
1717	;
1718
1719	;
1720	; After that, the BSS follows with several runtime
1721	; variables and structures.
1722	; The BSS is not part of the image on disk of course.
1723	;
1724
1725	; -----------------------------------------------------------------------------
1726	; PROTECTION IMAGE
1727	; -----------------------------------------------------------------------------
1728
1729	;
1730	; This is the AiR-BOOT MBR Protection Image.
1731	; The stuff generated here gets overwritten when the
1732	; MBR_PROT module, which is assembled separately,
1733	; gets binary merged.
1734	; So you won't find the string below in the generated binary.
1735	;
1736	; BOOKMARK: AiR-BOOT MBR Protection Image
1737	ORIGIN 06900h
1738
1739
1740
1741
1742	;
1743	; Hardcoded to 768 bytes (MBR_PROT.ASM)
1744	; The string below is searched for by the FIXCODE helper and must be
1745	; page (256 bytes) aligned.
1746	;
1747	; It seems to be possible to shrink the protection-image to 768 bytes.
1748	; That gives us an additional 256 bytes of code-space.
1749	; MBR-PROT.ASM,FIXCODE.C,PARTMAIN.ASM and AIR-BOOT.ASM need to be adjusted for that.
1750	; Also the granularity needs to change from 512 bytes to 256 bytes since
1751	; 6900h is not a 512-byte boundary.
1752	;
1753	; 20120908 - Done.
1754	;
1755	MBR_Protection db 'AiR-BOOT MBR-Protection Image'
1756
1757	; Just fill.
1758	;~ db 1024-($-MBR_Protection) dup('M')
1759	db 768-($-MBR_Protection) dup('M')
1760
1761
1762
1763
1764
1765
1766
1767	;==============================================================================
1768	; Sector 55
1769	;==============================================================================
1770	; -----------------------------------------------------------------------------
1771	; AiR-BOOT CONFIGURATION
1772	; -----------------------------------------------------------------------------
1773
1774	;
1775	; This section contains the AiR-BOOT configuration.
1776	; Note that it has a version that should be updated
1777	; when stuff is added.
1778	; Also add stuff to the end so that offsets of other
1779	; variables remain vaild.
1780	;
1781	; BOOKMARK: AiR-BOOT Configuration Sector
1782	ORIGIN 06C00h
1783
1784	Configuration:
1785	; THERE IS A NON-ASCII CHAR HERE !!
1786	; Your editor may not display this non-ASCII
1787	; character at the end if the 'AiRCFG-TABLE'
1788	; string. When this character get's deleted,
1789	; AiR-BOOT will not function because it cannot
1790	; find the config-signature which includes this
1791	; invisible character. The code of the char is: 0adh.
1792	db 'AiRCFG-TABLE'
1793	db 01h, 10h, 'U' ; "Compressed" ID String
1794	; Version 1.02 was for code 1.06, 1.03 was internal
1795	; and 1.04,1.05 and 1.06 do not exist.
1796	;
1797	; 1.07 was used with AB v1.07 and introduced the phase1
1798	; system-name. For the rest it is compatible with v1.02.
1799	;
1800	; 1.0.8 is introduced with AB v1.0.8 and indicates the movement
1801	; of several components and the packing of the hideparttable.
1802	; The core configuration has not changed but the generated
1803	; configuration has. The v1.0.8 installer handles upgrading.
1804	;
1805	; It has been decided that uneven minor numbers will be
1806	; test-versions. Therefore v1.0.8 has been bumbed to v1.1.0.
1807	;
1808	; It is not required for the config to have the
1809	; same version as the code, so in the future
1810	; the code version might be higher than the
1811	; config version if there are no changes to the latter.
1812	;
1813
1814	CFG_LastTimeEditLow dw 0 ; Last Time Edited Stamp (will incr every setup)
1815	CFG_LastTimeEditHi dw 0 ; second 16 bit part...
1816
1817	CFG_CheckConfig dw 0 ; Check-Sum for Configuration
1818
1819	CFG_Partitions db 0 ; Count of partitions in IPT
1820	CFG_MiscFlags db 1 ; Miscellaneous Flags (See EQUates)
1821	CFG_PartDefault db 0 ; Default-Partition (Base=0)
1822
1823	CFG_PartLast db 0 ; Which Partition was booted last time ? (Base=0)
1824	CFG_TimedBoot db 0 ; Timed Boot Enable (for REAL Enable look TimedBootEnable)
1825	CFG_TimedSecs db 15 ; Timed Boot - How Many Seconds Till Boot
1826	CFG_TimedDelay dw 123 ; Timed Boot - Delay
1827	CFG_TimedBootLast db 1 ; Timed Boot - Boot From Last Drive Booted From
1828	CFG_RememberBoot db 1 ; Remember Manual Boot Choice
1829	CFG_RememberTimed db 0 ; Remember if Timed Boot (if both disabled: Boot Default)
1830	CFG_IncludeFloppy db 1 ; Include Floppy Drives in Boot-Menu
1831	CFG_BootMenuActive db 1 ; Display Boot-Menu (if Disabled: Boot Default)
1832	; v0.29+ -> 2 - Detailed Bootmenu
1833	CFG_PartitionsDetect db 1 ; Autodetect New Partitions (Auto-Add!)
1834	CFG_PasswordSetup db 0 ; Ask Password when entering Setup
1835	CFG_PasswordSystem db 0 ; Ask Password when booting System
1836	CFG_PasswordChangeBoot db 0 ; Ask Password when changing boot partition
1837	CFG_ProtectMBR db 0 ; Protect MBR via TSR ?
1838	CFG_IgnoreWriteToMBR db 0 ; Just ignore writes to MBR, otherwise crash
1839	CFG_FloppyBootGetName db 0 ; Gets floppy name for display purposes
1840	CFG_DetectVirus db 0 ; Detect Virus ?
1841	CFG_DetectStealth db 0 ; Detect Stealth-Virus ?
1842	CFG_DetectVIBR db 0 ; Detect BootRecord-Virus ?
1843	CFG_AutoEnterSetup db 0 ; Automatic Enter Setup (first install!)
1844	CFG_MasterPassword dw 0101Fh ; Encoded Password (this is just CR)
1845	dw 07A53h
1846	dw 0E797h
1847	dw 0A896h
1848	CFG_BootPassword dw 0101Fh ; Another CR... ;-)
1849	dw 07A53h
1850	dw 0E797h
1851	dw 0A896h
1852	db 0 ; Rude-Protection - Removed since v0.28b
1853	CFG_LinuxRootPartition db 0 ; Linux Root Partition (Base=0)
1854	CFG_TimedKeyHandling db 0 ; Timed Key Handling (for Timed Boot)
1855	; 0 - Do Nothing
1856	; 1 - Reset Time
1857	; 2 - Stop Time
1858	CFG_MakeSound db 0 ; Should be clear ;)
1859	CFG_FloppyBootGetTimer db 0 ; Floppy Name will get updated every 2 secs
1860	CFG_ResumeBIOSbootSeq db 1 ; If BIOS Boot Sequence should be resumed
1861	; 0 - Disabled
1862	; 1 - CD-ROM
1863	; 2 - Network
1864	; 3 - ZIP/LS120
1865	CFG_CooperBars db 0 ; If Cooper Bars should be shown
1866	CFG_LinuxCommandLine db 75 dup (0) ; Linux Command Line
1867	CFG_LinuxKrnlPartition db 0FFh ; FAT-16 Linux Kernel Partition (Base=0)
1868	; FFh -> Disabled
1869	CFG_LinuxDefaultKernel db 'DEFAULT', 4 dup (32), 0 ; Default Kernel Name
1870	CFG_LinuxLastKernel db 11 dup (32), 0 ; Last-Booted Kernel Name
1871	CFG_ExtPartitionMShack db 0 ; Extended Partition M$-Hack Global Enable
1872	CFG_AutomaticBoot db 0 ; Automatic Booting (only one bootup)
1873	CFG_PartAutomatic db 0 ; Partition-No for automatic booting
1874	CFG_ForceLBAUsage db 1 ; LBA-BIOS-API forced on any HDD I/O
1875	CFG_IgnoreLVM db 0 ; Ignores any LVM-Information
1876
1877
1878	;
1879	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
1880	;
1881
1882	;
1883	; Drive Letters.
1884	;
1885	; BOOKMARK: Stored Drive Letters
1886	ORIGIN 06CB0h
1887
1888
1889	; -----------------------------------------------------------------------------
1890	; DRIVE LETTERS
1891	; -----------------------------------------------------------------------------
1892
1893	;
1894	; Moved here to make room for packed hiddenparttable.
1895	; This gets filled when drive-letters that are assigned using the dl-feature.
1896	;
1897	DriveLetters db LocIPT_MaxPartitions dup (0)
1898	; Format is:
1899	;============
1900	; Drive-Letter : BYTE (80h-C:, 81h-D:)
1901	; --------------------> 1 Byte * 45
1902
1903
1904
1905	; -----------------------------------------------------------------------------
1906	; INSTALL VOLUME
1907	; -----------------------------------------------------------------------------
1908
1909	;
1910	; Allways have the name of the installation volume
1911	; at this offset.
1912	; So future config changes will not break auto-install.
1913	;
1914	; BOOKMARK: Name of eCS Installation Volume
1915	ORIGIN 06D00h
1916
1917	; SET(A)BOOT stores the volume name of the eCS system being installed here.
1918	; It is truncated to 11 chars because AiR-BOOT currently does not support
1919	; longer labelnames. The name is also capitalized.
1920	;eCS_InstallVolume db 12 dup (0)
1921	;eCS_InstallVolume db 'HIGHLOG' ,0
1922	;eCS_InstallVolume db 'ECS-MIDDLE',0,0
1923	;eCS_InstallVolume db 'ECS-HIGH',0,0,0,0
1924	;eCS_InstallVolume db 'ECS-HIGH',0,'NO',0
1925	;eCS_InstallVolume db 'KANWEG2',0
1926	eCS_InstallVolume db 0,'NOPHASEONE' ,0
1927
1928	;
1929	; THERE IS ROOM RESERVED HERE FOR MORE VARIABLES
1930	;
1931
1932
1933	; -----------------------------------------------------------------------------
1934	; FLOPPY/CDROM/BIOS BOOT ENTRIES
1935	; -----------------------------------------------------------------------------
1936
1937	;
1938	; 06DABh - 06C00h = 01ABh = 427 bytes.
1939	; Entries allocated down from 06E00 boundary.
1940	;
1941	; BOOKMARK: Floppy/CD-ROM/BIOS Boot Entries
1942	ORIGIN 06DABh ; 427 Boundry
1943
1944	; (432 - 5 = 427)
1945	AutoDrvLetter db 0
1946	AutoDrvLetterSerial dd 0
1947
1948	; This entry is also 34 bytes long (466 - 34 = 432)
1949	BIOScontIPTentry:
1950	db 0, 0, 0, 0, ' '
1951	db 0, 0FEh, Flags_Bootable
1952	dw 0 ; No Checksum :)
1953	db 0, 1, 0
1954	db 0, 1, 0 ; Location of Partition/Boot Record
1955	dd 0, 0
1956
1957	; VIR variables are for the AiR-BOOT Anti Virus Code
1958	; Most of them are backups of Interrupt Points, so we can check, if a
1959	; stealth virus is on-line, we can intercept its call.
1960	; Normal (non stealth) virus are trapped simply by rereading the MBR sector.
1961	; If a virus is found, we will restore MBR from Sektor 60/62 and stop the
1962	; system from working, so the user has to press reset.
1963	; That's saver than a Reboot.
1964	;
1965	; If a virus is found on the partition to boot, the system will ONLY halt,
1966	; nothing more, because we can not remove it. The user shall do it :)
1967	; Those viruses are detected via a real nasty method...Checksum-Checking of the
1968	; boot-record, which is to be executed. If it does not match the one in our
1969	; internal partition table, we will stop. You may however switch this detection
1970	; off or just reset it by switching 'VIBR Detection'.
1971
1972	; 478 - 12 = 466 ; 466 Sub-Part
1973	CFG_VIR_INT08 dd 0 ; pointer to saved 08h entry point
1974	CFG_VIR_INT13 dd 0 ; pointer to saved 13h entry point
1975	CFG_VIR_INT1C dd 0 ; pointer to saved 1Ch entry point
1976
1977	; 478 Boundry (512-34)
1978	; This entry is also 34 bytes long
1979	FloppyIPTentry db 0, 0, 0, 0, 'FloppyDrive'
1980	db 0, 0FFh, Flags_Bootable
1981	dw 0 ; No Checksum :)
1982	db 0, 1, 0
1983	db 0, 1, 0 ; Location of Partition/Boot Record
1984	dd 0, 0
1985
1986
1987
1988	; -----------------------------------------------------------------------------
1989	; INTERNAL PARTITION TABLE (IPT)
1990	; -----------------------------------------------------------------------------
1991
1992	;
1993	; AiR-BOOT Internal Partition Table (IPT)
1994	;
1995	; BOOKMARK: Internal Partition Table
1996	ORIGIN % (image_size - 0a00h - (image_size - image_size_60secs))
1997
1998
1999	;
2000	; Rousseau: This is the start of the AiR-BOOT IPT
2001	;
2002	PartitionTable db (LocIPT_MaxPartitions * LocIPT_LenOfIPT) dup (0)
2003	; no-partitions detected... :]
2004	; db 1, 0, 0, 0, 'Harddisc 1'
2005	; db 0, 0FFh, Flags_BootAble
2006	; dw 0 ; No Checksum :)
2007	; db 0, 0, 1
2008	; db 0, 0, 1 ; Location of Partition/Boot Record
2009	; dd 0, 0
2010
2011	; Format is:
2012	;============
2013	; SerialNumber * 4
2014	; PartitionName * 11
2015	; Drive * 1
2016	; SystemID * 1 (means the partition type)
2017	; Flags * 1
2018	; Checksum * 2 (for virus checking)
2019	; LocationBegin * 3 (where the partition begins)
2020	; LocationPartTab * 3 (where the partition table is)
2021	; AbsoluteBegin * 4 (where the partition begins, in absolute sectors)
2022	; AbsolutePartTab * 4 (where the partition table is, in absolute sectors)
2023	; --------------------> 34 Bytes (total maximum partition-entries = 30)
2024
2025
2026
2027	; No need to check overlap here because this string will
2028	; be overwritten if the maximum partition count is reached.
2029	; So this is not a critical boundary.
2030	ORG (image_size - 600h - (image_size - image_size_60secs) / 2 - 10)
2031
2032	db 'AiRBOOTPAR' ; 1K internal partition table
2033
2034
2035
2036	; -----------------------------------------------------------------------------
2037	; HIDDEN PARTITION TABLE (HPT)
2038	; -----------------------------------------------------------------------------
2039
2040	;
2041	; Hidden Partition Table (6-bit packed as of v1.0.8)
2042	;
2043	; BOOKMARK: Hidden Partition Table (packed)
2044	ORIGIN % (image_size - 600h - (image_size - image_size_60secs) / 2)
2045
2046	HidePartitionTable db (LocIPT_MaxPartitions * LocHPT_LenOfHPT) dup (0FFh)
2047	; Format is:
2048	;============
2049	; PartitionPtr : BYTE * 30
2050	; --------------------> 30 Bytes * 45
2051
2052	;
2053	; Driveletters were here.
2054	; Moved down to make room for packed hideparttable.
2055	;
2056
2057
2058	;
2059	; End of hidden partition table.
2060	; Check overlap here for security reasons.
2061	;
2062	ORIGIN % (image_size - 200h - 5)
2063
2064	; 79fa - end of packed hide table
2065	db 'ABHID' ; 1K internal Hide-partition table
2066
2067
2068
2069
2070	;==============================================================================
2071	; Sector 62
2072	;==============================================================================
2073	; -----------------------------------------------------------------------------
2074	; MBR BACKUP
2075	; -----------------------------------------------------------------------------
2076
2077	;
2078	; AiR-BOOT MBR Backup.
2079	;
2080	; BOOKMARK: MBR Backup
2081	ORIGIN % (image_size - 200h)
2082
2083
2084	MBR_BackUpMBR db 'AiR-BOOT MBR-BackUp',\
2085	' - Just to fill this sector with something',0
2086	AirBootRocks db 'AiR-BOOT Rocks!',0
2087
2088	db (512 - ($-MBR_BackUpMBR) - 2) dup('M')
2089
2090	; End of Image signature.
2091	;
2092	ORIGIN % (image_size - 2)
2093	dw 0BABEh
2094
2095
2096	;
2097	; End of Image.
2098	;
2099	ORIGIN % (image_size)
2100
2101
2102
2103	;
2104	; Terminate LDRIMAGE segment.
2105	;
2106	IFDEF SEGMENTED
2107	LDRIMAGE ENDS
2108	ENDIF
2109
2110
2111
2112
2113
2114
2115
2116	;##############################################################################
2117	; BSS SEGMENT
2118	;##############################################################################
2119
2120	; BOOKMARK: BSS Segment
2121
2122	;
2123	; Open BSS segment.
2124	;
2125	IFDEF SEGMENTED
2126	VOLATILE SEGMENT USE16 PUBLIC 'BSS'
2127	ENDIF
2128
2129
2130
2131	sobss:
2132	;------------------------------------------------------------------------------
2133
2134	;
2135	; Removed ORG for BSS data to be more compatible
2136	; with segment-concatenated layout.
2137	;
2138	; What happens before this space ??
2139	; If org 0 corruption occurs.
2140	;
2141
2142	;
2143	; Filling hiddenparttable goes out-of-bounds !
2144	; Fixed with 6-bit packing.
2145	;
2146
2147	;
2148	; If segmented, offsets are relative to the BSS segment.
2149	; They are resolved at link-time.
2150	; If not segmented, offsets are relative to the CODE segment.
2151	;
2152	IFDEF SEGMENTED
2153	ORG 02400h
2154	ELSE
2155	ORG 0A000h
2156	ENDIF
2157
2158
2159	; -----------------------------------------------------------------------------
2160	; START OF BSS DATA
2161	; -----------------------------------------------------------------------------
2162
2163	; This space actually gets initialized in PreCrap to NUL (till EndOfVariables)
2164	BeginOfVariables:
2165
2166
2167	; -----------------------------------------------------------------------------
2168	; SECTOR BUFFERS
2169	; -----------------------------------------------------------------------------
2170	; BOOKMARK: Sector Buffers
2171	PartitionSector db 512 dup (?) ; Temporary Sector for Partition
2172	PBRSector db 512 dup (?) ; Temporary Sector for JFS/HPFS writeback
2173	LVMSector db 512 dup (?) ; Temporary Sector for LVM
2174	TmpSector db 512 dup (?) ; Temporary Sector
2175	Scratch db 256 dup (?) ; Scratch buffer
2176
2177	; -----------------------------------------------------------------------------
2178	; NEW PARTITION TABLE
2179	; -----------------------------------------------------------------------------
2180	; Everything used to build a new IPT and reference it to the old one
2181	; BOOKMARK: New Partition Table
2182	NewPartTable db 1536 dup (?) ; New Partition Table
2183
2184
2185	; -----------------------------------------------------------------------------
2186	; NEW HIDE PARTITION TABLE
2187	; -----------------------------------------------------------------------------
2188	; BOOKMARK: New Hide-Partition Table
2189	NewHidePartTable db LocIPT_MaxPartitions * LocHPT_LenOfHPT dup (?)
2190
2191	;~ even
2192
2193	; -----------------------------------------------------------------------------
2194	; NEW DRIVE LETTERS
2195	; -----------------------------------------------------------------------------
2196	; BOOKMARK: Logical Drive-Letters
2197	NewDriveLetters db LocIPT_MaxPartitions dup (?)
2198
2199	;~ even
2200
2201	; -----------------------------------------------------------------------------
2202	; PARTITION SIZE TABLE
2203	; -----------------------------------------------------------------------------
2204	; Size-Table (6 bytes per partition)
2205	; BOOKMARK: Partition Size Table
2206	PartitionSizeTable db LocIPT_MaxPartitions * 6 dup (?)
2207
2208
2209	; -----------------------------------------------------------------------------
2210	; PARTITION POINTERS
2211	; -----------------------------------------------------------------------------
2212	; Maximum is 52 word entries till now
2213	; BOOKMARK: Partition Pointers
2214	PartitionPointers dw 52 dup (?)
2215
2216	; Count of total Partition Pointers
2217	PartitionPointerCount db ?
2218
2219	; -----------------------------------------------------------------------------
2220	; XREF TABLE
2221	; -----------------------------------------------------------------------------
2222
2223	; X-Reference Table (holds new partnr, index is old part nr)
2224	; BOOKMARK: Xref Table
2225	PartitionXref db LocIPT_MaxPartitions dup (?)
2226
2227	; -----------------------------------------------------------------------------
2228	; VOLUME LETTERS
2229	; -----------------------------------------------------------------------------
2230
2231	; Volume-Letters
2232	; 0 - no LVM support
2233	; 1 - LVM support, but no letter
2234	; 'C'-'Z' - assigned drive letter
2235	; BOOKMARK: Volume Drive Letters
2236	PartitionVolumeLetters db LocIPT_MaxPartitions dup (?)
2237
2238
2239
2240	; -----------------------------------------------------------------------------
2241	; MISC VARS AND FLAGS
2242	; -----------------------------------------------------------------------------
2243	; BOOKMARK: Misc Vars and Flags
2244	TotalHarddiscs db ? ; Total harddrives (by POST)
2245	LBASwitchTable db 128 dup (?) ; Bit 25-18 for CHS/LBA Switching
2246	NewPartitions db ? ; Freshly found partitions
2247	; Independent of SaveConfiguration
2248	TooManyPartitions db ? ; Non-zero if too many partitions found
2249
2250	VideoIO_Segment dw ? ; Segment for Video I/O
2251
2252	ExtendedAbsPos dd ? ; Extended Partition Absolute Position
2253	ExtendedAbsPosSet db ? ; If Absolute Position set
2254
2255	CurPartition_Location dw 4 dup (?) ; Where did current partition come from?
2256	CurIO_UseExtension db ? ; 1-Use INT 13h EXTENSIONS
2257	; (filled out by PreCrap)
2258	CurIO_Scanning db ? ; 1-AiR-BOOT is scanning partitions
2259	; (for detailed error message)
2260
2261	; [Linux support removed since v1.02]
2262	;GotLinux db ? ; 1-Linux found
2263
2264
2265	; -----------------------------------------------------------------------------
2266	; MENU RELATED VARS
2267	; -----------------------------------------------------------------------------
2268	Menu_EntrySelected db ? ; Which partition we boot this time...
2269	Menu_UpperPart db ? ; Which number (Base=0) is the partition upper pos
2270	Menu_AbsoluteX db ? ; Pos where Menu stuff starts
2271	Menu_TotalParts db ? ; Copy of CFG_BootParts
2272	Menu_TotalLines db ? ; Total Lines on Screen used for BootMenu
2273	Menu_EntryDefault db ? ; Default Entry in filtered View
2274	Menu_EntryLast db ? ; LastBooted Entry in filtered View
2275	Menu_EntryAutomatic db ? ; Automatic Entry in filtered View
2276	; - All adjusted to menu locations
2277
2278	; -----------------------------------------------------------------------------
2279	; PARTITION RELATED VARS
2280	; -----------------------------------------------------------------------------
2281	PartSetup_UpperPart db ? ; Partition-Setup (like Menu_UpperPart)
2282	PartSetup_ActivePart db ? ; Active Partition
2283	PartSetup_HiddenUpper db ? ; (like Menu_UpperPart)
2284	PartSetup_HiddenX db ? ; Pos for Hidden-Setup
2285	PartSetup_HiddenAdd db ? ; Adjust for Hidden-Setup
2286
2287	; -----------------------------------------------------------------------------
2288	; TIMER / SETUP RELATED VARS
2289	; -----------------------------------------------------------------------------
2290	TimedBootEnable db ? ; Local Enable/Disable for timed boot
2291	TimedTimeOut dd ? ; TimeOut Timer for TimedBoot (too much time here;)
2292	TimedSecondLeft db ? ; How many seconds are left till boom ?
2293	TimedSecondBack db ? ; To get a modification noticed
2294	TimedBootUsed db ? ; Timed Boot used for bootup ?
2295	FloppyGetNameTimer dd ? ; Timer for Floppy-Get-Name
2296	SETUP_KeysOnEntry db ? ; which Shift Status was there, when booting ?
2297	SETUP_ExitEvent db ? ; Exit Event to end SETUP
2298	TempPasswordEntry db 17 dup (?)
2299	SETUP_OldPwd db 17 dup (?)
2300	SETUP_NewPwd db 17 dup (?)
2301	SETUP_VerifyPwd db 17 dup (?)
2302	StartSoundPlayed db ?
2303	ChangePartNameSave db ? ; Save label after user-edit ?
2304	SyncLvmLabels db ? ; Sync LVM labels after user-edit ?
2305
2306
2307	; -----------------------------------------------------------------------------
2308	; FX RELATED VARS
2309	; -----------------------------------------------------------------------------
2310	FX_UseCount dw ?
2311	FX_OverallTimer dw ?
2312	FX_WideScrollerTimer dw ?
2313	FX_WideScrollerCurPos dw ?
2314	FX_WideScrollerSpeed db ?
2315	FX_WideScrollerSpeedState db ?
2316	FX_WideScrollerDirection db ?
2317	FX_WideScrollerAbsDirection db ?
2318	FX_WideScrollerBounceSpeed db ?
2319	FX_CooperBarsTimer dw ?
2320
2321	; Dynamically Generated Tables - do not need to get initialized with NUL
2322	FX_CooperColors db 672 dup (?) ; 7 cooper bars*96 - runtime calculated
2323	FX_CooperState db 7 dup (?)
2324	FX_SinusPos db 7 dup (?)
2325	FX_CooperPos dw 7 dup (?)
2326
2327
2328	; -----------------------------------------------------------------------------
2329	; CHARSET BUFFER
2330	; -----------------------------------------------------------------------------
2331	CharsetTempBuffer db 4096 dup (?) ; Uninitialized Charset buffer
2332
2333	; -----------------------------------------------------------------------------
2334	; LVM CRC TABLE
2335	; -----------------------------------------------------------------------------
2336	LVM_CRCTable dd 256 dup (?) ; LVM-CRC (->SPECiAL\LVM.asm)
2337
2338	;~ ; [Linux support removed since v1.02]
2339	;~ FAT16_Drive db ? ; FAT-16: Drive of FAT16-partition
2340	;~ FAT16_AbsPartitionBegin dd ? ; FAT-16: LBA Begin of Partition
2341	;~ FAT16_SecsPerCluster db ? ; FAT-16: Sectors Per Cluster
2342	;~ FAT16_NumOfRootEntries dw ? ; FAT-16: Number of Root Entries
2343	;~ FAT16_SecsPerFAT dw ? ; FAT-16: Sectors Per FAT
2344	;~ FAT16_AbsFATBegin dd ? ; FAT-16: LBA Begin of FAT
2345	;~ FAT16_AbsRootBegin dd ? ; FAT-16: LBA Begin of Root
2346	;~ FAT16_AbsClusterBegin dd ? ; FAT-16: LBA Begin of Clusters
2347	;~ FAT16_FATCacheSector db ? ; FAT-16: FAT-Sector No in Cache
2348	;~ FAT16_FATCache db 512 dup (?) ; FAT-16: FAT-Area Cache
2349	;~ LINUX_KernelEntries db 680 dup (?) ; 34*20 -> Space for Kernel-Entries
2350	;~ LINUX_KernelNo db ? ; Total of Kernels in KernelEntries
2351	;~ LINUX_KernelSizeTable db 120 dup (?) ; Size-Table (6 bytes per kernel)
2352
2353
2354	;
2355	; Rousseau: added some stuff.
2356	;
2357	; -----------------------------------------------------------------------------
2358	; ECS PHASE1 RELATED
2359	; -----------------------------------------------------------------------------
2360	Phase1Active db ?
2361	OldPartitionCount db ?
2362
2363
2364	; -----------------------------------------------------------------------------
2365	; DISK PARAMETERS
2366	; -----------------------------------------------------------------------------
2367	;EVEN
2368	HugeDisk db MaxDisks dup(?)
2369	TrueSecs dd MaxDisks dup(?)
2370
2371	; BIOS geometry of the boot-drive
2372	; Note that heads cannot be 256 due to legacy DOS/BIOS bug
2373	; If Int13X is supported those values are used, otherwise the legacy values.
2374	BIOS_Cyls dd MaxDisks dup(?)
2375	BIOS_Heads dd MaxDisks dup(?)
2376	BIOS_Secs dd MaxDisks dup(?)
2377	BIOS_Bytes dw MaxDisks dup(?)
2378	BIOS_TotalSecs dq MaxDisks dup(?)
2379
2380	; LBA geometry of the boot-drive
2381	; Note that these values are taken from the BPB of a partition boot-record
2382	LVM_Cyls dd MaxDisks dup(?)
2383	LVM_Heads dd MaxDisks dup(?)
2384	LVM_Secs dd MaxDisks dup(?)
2385	LVM_Bytes dw MaxDisks dup(?)
2386	LVM_TotalSecs dq MaxDisks dup(?)
2387
2388	; OS/2 geometry of the boot-drive
2389	; Note that these values are taken from the BPB of a partition boot-record
2390	LOG_Cyls dd MaxDisks dup(?)
2391	LOG_Heads dd MaxDisks dup(?)
2392	LOG_Secs dd MaxDisks dup(?)
2393	LOG_Bytes dw MaxDisks dup(?)
2394	LOG_TotalSecs dq MaxDisks dup(?)
2395
2396	; Get's initialized at startup to: 00000011111111111111111111111100b
2397	; Meaning A,B not free; C-Z free, rest unused. (right to left)
2398	; Each partition with an assigned drive-letter clears a bit in this map.
2399	FreeDriveletterMap dd ?
2400
2401	; LBA address of master LVM sector, zero if non-existant
2402	MasterLVMLBA dd ?
2403
2404
2405	; -----------------------------------------------------------------------------
2406	; I13X BUFFER
2407	; -----------------------------------------------------------------------------
2408	;
2409	; BOOKMARK: Temporary buffer for 48h INT13X bios call.
2410	;
2411
2412	; Size of the buffer.
2413	; this param must be filled in.
2414	; Code inserts it.
2415	i13xbuf dw 1 dup (?)
2416
2417	; The buffer itself.
2418	db 126 dup(?)
2419
2420	; Size of buffer calculated.
2421	; (excluding the size word at the start).
2422	i13xbuf_size = $-offset i13xbuf-2
2423
2424	; Some debug area.
2425	ott db 512 dup(?)
2426
2427
2428	; End of transient variables.
2429	EndOfVariables:
2430
2431
2432
2433
2434	; -----------------------------------------------------------------------------
2435	; OLD AND NEW STACKS
2436	; -----------------------------------------------------------------------------
2437	; BOOKMARK: Storage for Old and New Stack Pointers
2438	;
2439	; These need to be outside the variable section because AiR-BOOT can restart
2440	; itself in debug-mode. If the OldSP and OldSS would be in the variable area,
2441	; they would be cleared on AiR-BOOT restart.
2442	;
2443
2444	; The variable section is cleared word-wise, so it could clear one byte extra
2445	; depending on the alignment and size. This DD prevents the OldSP and OldSS
2446	; to be partly overwritten by the clearing routine.
2447	dd ?
2448
2449	; SS:SP from before our relocation.
2450	; The registers values when the BIOS transferred control to us were pushed
2451	; on this stack.
2452
2453	OldSP dw ?
2454	OldSS dw ?
2455
2456	; SS:SP currently in use.
2457	; They are temporarily dumped here so we can pop the resgisters from
2458	; the old stack to display them in debug mode.
2459	CurrentSP dw ?
2460	CurrentSS dw ?
2461
2462
2463
2464	;
2465	; End of BSS segment.
2466	;
2467	eobss:
2468
2469	;
2470	; Close BSS segment.
2471	;
2472	IFDEF SEGMENTED
2473	VOLATILE ENDS
2474	ELSE
2475	LDRIMAGE ENDS
2476	ENDIF
2477
2478	; BOOKMARK: End of Module
2479	END AiR_BOOT
2480

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