WebSVN – Kolibri OS – Blame – /kernel/trunk/boot/bootcode.inc

Rev	Author	Line No.	Line
2288	clevermous	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
2455	mario79	3	;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
2288	clevermous	4	;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;;
		5	;; Distributed under terms of the GNU General Public License ;;
		6	;; ;;
		7	;; BOOTCODE.INC ;;
		8	;; ;;
		9	;; KolibriOS 16-bit loader, ;;
		10	;; based on bootcode for MenuetOS ;;
		11	;; ;;
		12	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		13
		14	$Revision: 2466 $
		15
		16
		17	;==========================================================================
		18	;
		19	; 16 BIT FUNCTIONS
		20	;
		21	;==========================================================================
		22
		23
		24	putchar:
		25	; in: al=character
		26	mov ah, 0Eh
		27	mov bh, 0
		28	int 10h
		29	ret
		30
		31	print:
		32	; in: si->string
		33	mov al, 186
		34	call putchar
		35	mov al, ' '
		36	call putchar
		37
		38	printplain:
		39	; in: si->string
		40	pusha
		41	lodsb
		42	@@:
		43	call putchar
		44	lodsb
		45	test al, al
		46	jnz @b
		47	popa
		48	ret
		49
		50	getkey:
		51	; get number in range [bl,bh] (bl,bh in ['0'..'9'])
		52	; in: bx=range
		53	; out: ax=digit (1..9, 10 for 0)
		54	mov ah, 0
		55	int 16h
		56	cmp al, bl
		57	jb getkey
		58	cmp al, bh
		59	ja getkey
		60	push ax
		61	call putchar
		62	pop ax
		63	and ax, 0Fh
		64	jnz @f
		65	mov al, 10
		66	@@:
		67	ret
		68
		69	setcursor:
		70	; in: dl=column, dh=row
		71	mov ah, 2
		72	mov bh, 0
		73	int 10h
		74	ret
		75
		76	macro _setcursor row,column
		77	{
		78	mov dx, row*256 + column
		79	call setcursor
		80	}
		81
		82	boot_read_floppy:
		83	push si
		84	xor si, si
		85	mov ah, 2 ; read
		86	@@:
		87	push ax
		88	int 0x13
		89	pop ax
		90	jnc @f
		91	inc si
		92	cmp si, 10
		93	jb @b
		94	sayerr_badsect:
		95	mov si, badsect
		96	sayerr_plain:
		97	call printplain
		98	jmp $
		99	@@:
		100	pop si
		101	ret
		102
		103	; convert abs. sector number (AX) to BIOS T:H:S
		104	; sector number = (abs.sector%BPB_SecPerTrk)+1
		105	; pre.track number = (abs.sector/BPB_SecPerTrk)
		106	; head number = pre.track number%BPB_NumHeads
		107	; track number = pre.track number/BPB_NumHeads
		108	; Return: cl - sector number
		109	; ch - track number
		110	; dl - drive number (0 = a:)
		111	; dh - head number
		112	conv_abs_to_THS:
		113	push bx
		114	mov bx, word [BPB_SecPerTrk]
		115	xor dx, dx
		116	div bx
		117	inc dx
		118	mov cl, dl ; cl = sector number
		119	mov bx, word [BPB_NumHeads]
		120	xor dx, dx
		121	div bx
		122	; !!!!!!! ax = track number, dx = head number
		123	mov ch, al ; ch=track number
		124	xchg dh, dl ; dh=head number
		125	mov dl, 0 ; dl=0 (drive 0 (a:))
		126	pop bx
		127	retn
		128	; needed variables
		129	BPB_SecPerTrk dw 0 ; sectors per track
		130	BPB_NumHeads dw 0 ; number of heads
		131	BPB_FATSz16 dw 0 ; size of FAT
		132	BPB_RootEntCnt dw 0 ; count of root dir. entries
		133	BPB_BytsPerSec dw 0 ; bytes per sector
		134	BPB_RsvdSecCnt dw 0 ; number of reserved sectors
		135	BPB_TotSec16 dw 0 ; count of the sectors on the volume
		136	BPB_SecPerClus db 0 ; number of sectors per cluster
		137	BPB_NumFATs db 0 ; number of FAT tables
		138	abs_sector_adj dw 0 ; adjustment to make abs. sector number
		139	end_of_FAT dw 0 ; end of FAT table
		140	FirstDataSector dw 0 ; begin of data
		141
		142	;=========================================================================
		143	;
		144	; 16 BIT CODE
		145	;
		146	;=========================================================================
		147
		148	include 'bootvesa.inc' ;Include source for boot vesa
		149	if defined extended_primary_loader
		150	include 'parsers.inc'
		151	end if
		152
		153	start_of_code:
		154
		155	if defined extended_primary_loader
		156	; save data from primary loader
		157	mov word [cs:bootcallback], si
		158	mov word [cs:bootcallback+2], ds
		159	push cs
		160	pop ds
		161	mov [bootdevice], ax
		162	mov [bootfs], bx
		163
		164	; set up stack
		165	mov ax, 3000h
		166	mov ss, ax
		167	mov sp, 0EC00h
		168
		169	; try to load configuration file
		170	mov ax, 1
		171	mov di, config_file_struct
		172	call [bootcallback]
		173	cld
		174	push cs
		175	pop es
		176	; bx=0 - ok, bx=1 - part of file loaded, assume this is ok
		177	cmp bx, 1
		178	ja .config_bad
		179	; configuration file was loaded, parse
		180	; if length is too big, use first 0FFFFh bytes
		181	test dx, dx
		182	jz @f
		183	mov ax, 0FFFFh
		184	@@:
		185	; ds:si will be pointer to current data, dx = limit
		186	xchg ax, dx
		187	push 4000h
		188	pop ds
		189	xor si, si
		190	.parse_loop:
		191	; skip spaces
		192	cmp si, dx
		193	jae .parse_done
		194	lodsb
		195	cmp al, ' '
		196	jbe .parse_loop
		197	dec si
		198	; loop over all possible configuration values
		199	mov bx, config_file_variables
		200	.find_variant:
		201	; get length
		202	mov cx, [es:bx]
		203	; zero length = end of list
		204	jecxz .find_newline
		205	; skip over length
		206	inc bx
		207	inc bx
		208	mov di, bx
		209	; skip over string
		210	add bx, cx
		211	; test whether we have at least cx symbols left
		212	mov ax, cx
		213	add ax, si
		214	jc .next_variant1
		215	cmp ax, dx
		216	jae .next_variant1
		217	; save current position
		218	push si
		219	; compare strings
		220	repz cmpsb
		221	jnz .next_variant2
		222	; strings are equal; look for "=" with possible spaces before and after
		223	@@:
		224	cmp si, dx
		225	jae .next_variant2
		226	lodsb
		227	cmp al, ' '
		228	jbe @b
		229	cmp al, '='
		230	jnz .next_variant2
		231	; ok, we found the true variant
		232	; ignore saved position on the stack
		233	pop ax
		234	; call the parser
		235	call word [es:bx]
		236	; line parsed, find next
		237	.find_newline:
		238	cmp si, dx
		239	jae .parse_done
		240	lodsb
		241	cmp al, 13
		242	jz .parse_loop
		243	cmp al, 10
		244	jz .parse_loop
		245	jmp .find_newline
		246	.next_variant2:
		247	; continue to the next variant, restoring current position
		248	pop si
		249	.next_variant1:
		250	; continue to the next variant
		251	; skip over the parser
		252	inc bx
		253	inc bx
		254	jmp .find_variant
		255	.parse_done:
		256	.config_bad:
		257
		258	; set up segment registers
		259	push cs
		260	pop ds
		261	else
		262	cld
		263	; \begin{diamond}[02.12.2005]
		264	; if bootloader sets ax = 'KL', then ds:si points to loader block
		265	cmp ax, 'KL'
		266	jnz @f
		267	mov word [cs:cfgmanager.loader_block], si
		268	mov word [cs:cfgmanager.loader_block+2], ds
		269	@@:
		270	; \end{diamond}[02.12.2005]
		271
		272	; if bootloader sets cx = 'HA' and dx = 'RD', then bx contains identifier of source hard disk
		273	; (see comment to bx_from_load)
		274	cmp cx, 'HA'
		275	jnz no_hd_load
		276	cmp dx, 'RD'
		277	jnz no_hd_load
		278	mov word [cs:bx_from_load], bx ; {SPraid}[13.03.2007]
		279	no_hd_load:
		280
		281	; set up stack
		282	mov ax, 3000h
		283	mov ss, ax
		284	mov sp, 0EC00h
		285	; set up segment registers
		286	push cs
		287	pop ds
		288	push cs
		289	pop es
		290	end if
		291
		292	; set videomode
		293	mov ax, 3
		294	int 0x10
		295
		296	if lang eq ru
		297	; Load & set russian VGA font (RU.INC)
		298	mov bp, RU_FNT1 ; RU_FNT1 - First part
		299	mov bx, 1000h ; 768 bytes
		300	mov cx, 30h ; 48 symbols
		301	mov dx, 80h ; 128 - position of first symbol
		302	mov ax, 1100h
		303	int 10h
		304
		305	mov bp, RU_FNT2 ; RU_FNT2 -Second part
		306	mov bx, 1000h ; 512 bytes
		307	mov cx, 20h ; 32 symbols
		308	mov dx, 0E0h ; 224 - position of first symbol
		309	mov ax, 1100h
		310	int 10h
		311	; End set VGA russian font
		312	else if lang eq et
		313	mov bp, ET_FNT ; ET_FNT1
		314	mov bx, 1000h ;
		315	mov cx, 255 ; 256 symbols
		316	xor dx, dx ; 0 - position of first symbol
		317	mov ax, 1100h
		318	int 10h
		319	end if
		320
		321	; draw frames
		322	push 0xb800
		323	pop es
		324	xor di, di
		325	mov ah, 1*16+15
		326
		327	; draw top
		328	mov si, d80x25_top
		329	mov cx, d80x25_top_num * 80
		330	@@:
		331	lodsb
		332	stosw
		333	loop @b
		334	; draw spaces
		335	mov si, space_msg
		336	mov dx, 25 - d80x25_top_num - d80x25_bottom_num
		337	dfl1:
		338	push si
		339	mov cx, 80
		340	@@:
		341	lodsb
		342	stosw
		343	loop @b
		344	pop si
		345	dec dx
		346	jnz dfl1
		347	; draw bottom
		348	mov si, d80x25_bottom
		349	mov cx, d80x25_bottom_num * 80
		350	@@:
		351	lodsb
		352	stosw
		353	loop @b
		354
		355	mov byte [space_msg+80], 0 ; now space_msg is null terminated
		356
		357	_setcursor d80x25_top_num,0
		358
		359
		360	; TEST FOR 386+
		361
		362	mov bx, 0x4000
		363	pushf
		364	pop ax
		365	mov dx, ax
		366	xor ax, bx
		367	push ax
		368	popf
		369	pushf
		370	pop ax
		371	and ax, bx
		372	and dx, bx
		373	cmp ax, dx
		374	jnz cpugood
		375	mov si, not386
		376	sayerr:
		377	call print
		378	jmp $
		379	cpugood:
		380
		381	push 0
		382	popf
		383	sti
		384
		385	; set up esp
		386	movzx esp, sp
		387
		388	push 0
		389	pop es
2466	Serge	390	and word [es:BOOT_IDE_BASE_ADDR], 0
2288	clevermous	391	; \begin{Mario79}
		392	; find HDD IDE DMA PCI device
		393	; check for PCI BIOS
		394	mov ax, 0xB101
		395	int 0x1A
		396	jc .nopci
		397	cmp edx, 'PCI '
		398	jnz .nopci
		399	; find PCI class code
		400	; class 1 = mass storage
		401	; subclass 1 = IDE controller
		402	; a) class 1, subclass 1, programming interface 0x80
		403	mov ax, 0xB103
		404	mov ecx, 110000h + 1100h + 0x80
		405	xor si, si ; device index = 0
		406	int 0x1A
		407	jnc .found
		408	; b) class 1, subclass 1, programming interface 0x8A
		409	mov ax, 0xB103
		410	mov ecx, 110000h + 1100h + 0x8A
		411	xor si, si ; device index = 0
		412	int 0x1A
		413	jnc .found
		414	; c) class 1, subclass 1, programming interface 0x85
		415	mov ax, 0xB103
		416	mov ecx, 110000h + 1100h + 0x85
		417	xor si, si
		418	int 0x1A
		419	jc .nopci
		420	.found:
		421	; get memory base
		422	mov ax, 0xB10A
		423	mov di, 0x20 ; memory base is config register at 0x20
		424	int 0x1A
		425	jc .nopci
		426	and cx, 0xFFF0 ; clear address decode type
2466	Serge	427	mov [es:BOOT_IDE_BASE_ADDR], cx
2288	clevermous	428	.nopci:
		429	; \end{Mario79}
		430
		431	mov al, 0xf6 ; �� , ��
		432	out 0x60, al
		433	xor cx, cx
		434	wait_loop: ; variant 2
		435	; reading state of port of 8042 controller
		436	in al, 64h
		437	and al, 00000010b ; ready flag
		438	; wait until 8042 controller is ready
		439	loopnz wait_loop
		440
		441	;;;/diamond today 5.02.2008
		442	; set keyboard typematic rate & delay
		443	mov al, 0xf3
		444	out 0x60, al
		445	xor cx, cx
		446	@@:
		447	in al, 64h
		448	test al, 2
		449	loopnz @b
		450	mov al, 0
		451	out 0x60, al
		452	xor cx, cx
		453	@@:
		454	in al, 64h
		455	test al, 2
		456	loopnz @b
		457	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		458	; --------------- APM ---------------------
2466	Serge	459	and word [es:BOOT_APM_VERSION], 0 ; ver = 0.0 (APM not found)
2288	clevermous	460	mov ax, 0x5300
		461	xor bx, bx
		462	int 0x15
		463	jc apm_end ; APM not found
		464	test cx, 2
		465	jz apm_end ; APM 32-bit protected-mode interface not supported
2466	Serge	466	mov [es:BOOT_APM_VERSION], ax ; Save APM Version
		467	mov [es:BOOT_APM_FLAGS], cx ; Save APM flags
2288	clevermous	468
		469	; Write APM ver ----
		470	and ax, 0xf0f
		471	add ax, '00'
		472	mov si, msg_apm
		473	mov [si + 5], ah
		474	mov [si + 7], al
		475	_setcursor 0, 3
		476	call printplain
		477	; ------------------
		478
		479	mov ax, 0x5304 ; Disconnect interface
		480	xor bx, bx
		481	int 0x15
		482	mov ax, 0x5303 ; Connect 32 bit mode interface
		483	xor bx, bx
		484	int 0x15
		485
2466	Serge	486	mov [es:BOOT_APM_ENTRY], ebx
		487	mov [es:BOOT_APM_CODE_32], ax
		488	mov [es:BOOT_APM_CODE_16], cx
		489	mov [es:BOOT_APM_DATA_16], dx
2288	clevermous	490
		491	apm_end:
		492	_setcursor d80x25_top_num, 0
		493
		494	if ~ defined extended_primary_loader
		495	;CHECK current of code
		496	cmp [cfgmanager.loader_block], -1
		497	jz noloaderblock
		498	les bx, [cfgmanager.loader_block]
		499	cmp byte [es:bx], 1
		500	mov si, loader_block_error
		501	jnz sayerr
		502	push 0
		503	pop es
		504	end if
		505
		506	noloaderblock:
		507	; DISPLAY VESA INFORMATION
		508	call print_vesa_info
		509	call calc_vmodes_table
		510	call check_first_parm ;check and enable cursor_pos
		511
		512	; \begin{diamond}[30.11.2005]
		513	cfgmanager:
		514	; settings:
		515	; a) preboot_graph = graphical mode
		516	; preboot_gprobe = probe this mode?
		517	; b) preboot_dma = use DMA access?
		518	; c) preboot_vrrm = use VRR?
		519	; d) preboot_device = from what boot?
		520
		521	; determine default settings
		522	if ~ defined extended_primary_loader
		523	mov [.bSettingsChanged], 0
		524	end if
		525
		526	;.preboot_gr_end:
		527	mov di, preboot_device
		528	; if image in memory is present and [preboot_device] is uninitialized,
		529	; set it to use this preloaded image
		530	cmp byte [di], 0
		531	jnz .preboot_device_inited
		532	if defined extended_primary_loader
		533	inc byte [di]
		534	cmp byte [bootdevice], 'f' ; floppy?
		535	jz .preboot_device_inited
		536	inc byte [di]
		537	else
		538	cmp [.loader_block], -1
		539	jz @f
		540	les bx, [.loader_block]
		541	test byte [es:bx+1], 1
		542	jz @f
		543	mov byte [di], 3
		544	jmp .preboot_device_inited
		545	@@:
		546	; otherwise, set [preboot_device] to 1 (default value - boot from floppy)
		547	mov byte [di], 1
		548	end if
		549	.preboot_device_inited:
		550	; following 4 lines set variables to 1 if its current value is 0
		551	cmp byte [di+preboot_dma-preboot_device], 1
		552	adc byte [di+preboot_dma-preboot_device], 0
		553	cmp byte [di+preboot_biosdisk-preboot_device], 1
		554	adc byte [di+preboot_biosdisk-preboot_device], 0
		555	;; default value for VRR is OFF
		556	; cmp byte [di+preboot_vrrm-preboot_device], 0
		557	; jnz @f
		558	; mov byte [di+preboot_vrrm-preboot_device], 2
		559	;@@:
		560	; notify user
		561	_setcursor 5,2
		562
		563	mov si, linef
		564	call printplain
		565	mov si, start_msg
		566	call print
		567	mov si, time_msg
		568	call print
		569	; get start time
		570	call .gettime
		571	mov [.starttime], eax
		572	mov word [.timer], .newtimer
		573	mov word [.timer+2], cs
		574	.printcfg:
		575
		576	_setcursor 9,0
		577	mov si, current_cfg_msg
		578	call print
		579	mov si, curvideo_msg
		580	call print
		581
		582	call draw_current_vmode
		583
		584	mov si, usebd_msg
		585	cmp [preboot_biosdisk], 1
		586	call .say_on_off
		587	; mov si, vrrm_msg
		588	; cmp [preboot_vrrm], 1
		589	; call .say_on_off
		590	mov si, preboot_device_msg
		591	call print
		592	mov al, [preboot_device]
		593	if defined extended_primary_loader
		594	and eax, 3
		595	else
		596	and eax, 7
		597	end if
		598	mov si, [preboot_device_msgs+eax*2]
		599	call printplain
		600	.show_remarks:
		601	; show remarks in gray color
		602	mov di, ((21-num_remarks)80 + 2)2
		603	push 0xB800
		604	pop es
		605	mov cx, num_remarks
		606	mov si, remarks
		607	.write_remarks:
		608	lodsw
		609	push si
		610	xchg ax, si
		611	mov ah, 1*16+7 ; background: blue (1), foreground: gray (7)
		612	push di
		613	.write_remark:
		614	lodsb
		615	test al, al
		616	jz @f
		617	stosw
		618	jmp .write_remark
		619	@@:
		620	pop di
		621	pop si
		622	add di, 80*2
		623	loop .write_remarks
		624	.wait:
		625	_setcursor 25,0 ; out of screen
		626	; set timer interrupt handler
		627	cli
		628	push 0
		629	pop es
		630	push dword [es:8*4]
		631	pop dword [.oldtimer]
		632	push dword [.timer]
		633	pop dword [es:8*4]
		634	; mov eax, [es:8*4]
		635	; mov [.oldtimer], eax
		636	; mov eax, [.timer]
		637	; mov [es:8*4], eax
		638	sti
		639	; wait for keypressed
		640	xor ax, ax
		641	int 16h
		642	push ax
		643	; restore timer interrupt
		644	; push 0
		645	; pop es
		646	mov eax, [.oldtimer]
		647	mov [es:8*4], eax
		648	mov [.timer], eax
		649
		650	_setcursor 7,0
		651	mov si, space_msg
		652	call printplain
		653	; clear remarks and restore normal attributes
		654	push es
		655	mov di, ((21-num_remarks)80 + 2)2
		656	push 0xB800
		657	pop es
		658	mov cx, num_remarks
		659	mov ax, ' ' + (116 + 15)100h
		660	@@:
		661	push cx
		662	mov cx, 76
		663	rep stosw
		664	pop cx
		665	add di, 4*2
		666	loop @b
		667	pop es
		668	pop ax
		669	; switch on key
		670	cmp al, 13
		671	jz .continue
		672	or al, 20h
		673	cmp al, 'a'
		674	jz .change_a
		675	cmp al, 'b'
		676	jz .change_b
		677	; cmp al, 'c'
		678	; jz .change_c
		679	cmp al, 'c' ; 'd'
		680	jnz .show_remarks
		681	_setcursor 15,0
		682	mov si, bdev
		683	call print
		684	if defined extended_primary_loader
		685	mov bx, '12'
		686	else
		687	mov bx, '14'
		688	end if
		689	call getkey
		690	mov [preboot_device], al
		691	_setcursor 13,0
		692	.d:
		693	if ~ defined extended_primary_loader
		694	mov [.bSettingsChanged], 1
		695	end if
		696	call clear_vmodes_table ;clear vmodes_table
		697	jmp .printcfg
		698	.change_a:
		699	.loops:
		700	call draw_vmodes_table
		701	_setcursor 25,0 ; out of screen
		702	xor ax, ax
		703	int 0x16
		704	; call clear_table_cursor ;clear current position of cursor
		705
		706	mov si, word [cursor_pos]
		707
		708	cmp ah, 0x48;x,0x48E0 ; up
		709	jne .down
		710	cmp si, modes_table
		711	jbe .loops
		712	sub word [cursor_pos], size_of_step
		713	jmp .loops
		714
		715	.down:
		716	cmp ah, 0x50;x,0x50E0 ; down
		717	jne .pgup
		718	cmp word[es:si+10], -1
		719	je .loops
		720	add word [cursor_pos], size_of_step
		721	jmp .loops
		722
		723	.pgup:
		724	cmp ah, 0x49 ; page up
		725	jne .pgdn
		726	sub si, size_of_step*long_v_table
		727	cmp si, modes_table
		728	jae @f
		729	mov si, modes_table
		730	@@:
		731	mov word [cursor_pos], si
		732	mov si, word [home_cursor]
		733	sub si, size_of_step*long_v_table
		734	cmp si, modes_table
		735	jae @f
		736	mov si, modes_table
		737	@@:
		738	mov word [home_cursor], si
		739	jmp .loops
		740
		741	.pgdn:
		742	cmp ah, 0x51 ; page down
		743	jne .enter
		744	mov ax, [end_cursor]
		745	add si, size_of_step*long_v_table
		746	cmp si, ax
		747	jb @f
		748	mov si, ax
		749	sub si, size_of_step
		750	@@:
		751	mov word [cursor_pos], si
		752	mov si, word [home_cursor]
		753	sub ax, size_of_step*long_v_table
		754	add si, size_of_step*long_v_table
		755	cmp si, ax
		756	jb @f
		757	mov si, ax
		758	@@:
		759	mov word [home_cursor], si
		760	jmp .loops
		761
		762	.enter:
		763	cmp al, 0x0D;x,0x1C0D ; enter
		764	jne .loops
		765	push word [cursor_pos]
		766	pop bp
		767	push word [es:bp]
		768	pop word [x_save]
		769	push word [es:bp+2]
		770	pop word [y_save]
		771	push word [es:bp+6]
		772	pop word [number_vm]
		773	mov word [preboot_graph], bp ;save choose
		774
		775	jmp .d
		776
		777	.change_b:
		778	_setcursor 15,0
		779	; mov si, ask_dma
		780	; call print
		781	; mov bx, '13'
		782	; call getkey
		783	; mov [preboot_dma], al
		784	mov si, ask_bd
		785	call print
		786	mov bx, '12'
		787	call getkey
		788	mov [preboot_biosdisk], al
		789	_setcursor 11,0
		790	jmp .d
		791	;.change_c:
		792	; _setcursor 15,0
		793	; mov si, vrrmprint
		794	; call print
		795	; mov bx, '12'
		796	; call getkey
		797	; mov [preboot_vrrm], al
		798	; _setcursor 12,0
		799	; jmp .d
		800	;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		801	.say_on_off:
		802	pushf
		803	call print
		804	mov si, on_msg
		805	popf
		806	jz @f
		807	mov si, off_msg
		808	@@:
		809	jmp printplain
		810	; novesa and vervesa strings are not used at the moment of executing this code
		811	virtual at novesa
		812	.oldtimer dd ?
		813	.starttime dd ?
		814	if ~ defined extended_primary_loader
		815	.bSettingsChanged db ?
		816	end if
		817	.timer dd ?
		818	end virtual
		819	if ~ defined extended_primary_loader
		820	.loader_block dd -1
		821	end if
		822	.gettime:
		823	mov ah, 0
		824	int 1Ah
		825	xchg ax, cx
		826	shl eax, 10h
		827	xchg ax, dx
		828	ret
		829	.newtimer:
		830	push ds
		831	push cs
		832	pop ds
		833	pushf
		834	call [.oldtimer]
		835	pushad
		836	call .gettime
		837	sub eax, [.starttime]
		838	if defined extended_primary_loader
		839	sub ax, [preboot_timeout]
		840	else
		841	sub ax, 18*5
		842	end if
		843	jae .timergo
		844	neg ax
		845	add ax, 18-1
		846	mov bx, 18
		847	xor dx, dx
		848	div bx
		849	if lang eq ru
		850	; �� 5 ᥪ㭤, 4/3/2 ᥪ㭤�, 1 ᥪ㭤�
		851	cmp al, 5
		852	mov cl, ' '
		853	jae @f
		854	cmp al, 1
		855	mov cl, '�'
		856	jz @f
		857	mov cl, '�'
		858	@@:
		859	mov [time_str+9], cl
		860	else if lang eq et
		861	cmp al, 1
		862	ja @f
		863	mov [time_str+9], ' '
		864	mov [time_str+10], ' '
		865	@@:
		866	else
		867	; wait 5/4/3/2 seconds, 1 second
		868	cmp al, 1
		869	mov cl, 's'
		870	ja @f
		871	mov cl, ' '
		872	@@:
		873	mov [time_str+9], cl
		874	end if
		875	add al, '0'
		876	mov [time_str+1], al
		877	mov si, time_msg
		878	_setcursor 7,0
		879	call print
		880	_setcursor 25,0
		881	popad
		882	pop ds
		883	iret
		884	.timergo:
		885	push 0
		886	pop es
		887	mov eax, [.oldtimer]
		888	mov [es:8*4], eax
		889	mov sp, 0EC00h
		890	.continue:
		891	sti
		892	_setcursor 6,0
		893	mov si, space_msg
		894	call printplain
		895	call printplain
		896	_setcursor 6,0
		897	mov si, loading_msg
		898	call print
		899	_setcursor 15,0
		900	if ~ defined extended_primary_loader
		901	cmp [.bSettingsChanged], 0
		902	jz .load
		903	cmp [.loader_block], -1
		904	jz .load
		905	les bx, [.loader_block]
		906	mov eax, [es:bx+3]
		907	push ds
		908	pop es
		909	test eax, eax
		910	jz .load
		911	push eax
		912	mov si, save_quest
		913	call print
		914	.waityn:
		915	mov ah, 0
		916	int 16h
		917	or al, 20h
		918	cmp al, 'n'
		919	jz .loadc
		920	cmp al, 'y'
		921	jnz .waityn
		922	call putchar
		923	mov byte [space_msg+80], 186
		924
		925	pop eax
		926	push cs
		927	push .cont
		928	push eax
		929	retf ;call back
		930	.loadc:
		931	pop eax
		932	.cont:
		933	push cs
		934	pop ds
		935	mov si, space_msg
		936	mov byte [si+80], 0
		937	_setcursor 15,0
		938	call printplain
		939	_setcursor 15,0
		940	.load:
		941	end if
		942	; \end{diamond}[02.12.2005]
		943
		944	; ASK GRAPHICS MODE
		945
		946	call set_vmode
		947
		948	; GRAPHICS ACCELERATION
		949	; force yes
2466	Serge	950	mov [es:BOOT_MTRR], byte 1
2288	clevermous	951
		952	; DMA ACCESS TO HD
		953
		954	mov al, [preboot_dma]
2466	Serge	955	mov [es:BOOT_DMA], al
2288	clevermous	956
		957	;; VRR_M USE
		958	;
		959	; mov al,[preboot_vrrm]
		960	; mov [es:0x9030], al
		961
		962	; BOOT DEVICE
		963
		964	mov al, [preboot_device]
		965	dec al
		966	mov [boot_dev], al
		967
		968	; GET MEMORY MAP
		969	include '../detect/biosmem.inc'
		970
		971	; READ DISKETTE TO MEMORY
		972
		973	cmp [boot_dev], 0
		974	jne no_sys_on_floppy
		975	mov si, diskload
		976	call print
		977	xor ax, ax ; reset drive
		978	xor dx, dx
		979	int 0x13
		980	; do we boot from CD-ROM?
		981	mov ah, 41h
		982	mov bx, 55AAh
		983	xor dx, dx
		984	int 0x13
		985	jc .nocd
		986	cmp bx, 0AA55h
		987	jnz .nocd
		988	mov ah, 48h
		989	push ds
		990	push es
		991	pop ds
		992	mov si, 0xa000
		993	mov word [si], 30
		994	int 0x13
		995	pop ds
		996	jc .nocd
		997	push ds
		998	lds si, [es:si+26]
		999	test byte [ds:si+10], 40h
		1000	pop ds
		1001	jz .nocd
		1002	; yes - read all floppy by 18 sectors
		1003
		1004	; TODO: !!!! read only first sector and set variables !!!!!
		1005	; ...
		1006	; TODO: !!! then read flippy image track by track
		1007
		1008	mov cx, 0x0001 ; startcyl,startsector
		1009	.a1:
		1010	push cx dx
		1011	mov al, 18
		1012	mov bx, 0xa000
		1013	call boot_read_floppy
		1014	mov si, movedesc
		1015	push es
		1016	push ds
		1017	pop es
		1018	mov cx, 256*18
		1019	mov ah, 0x87
		1020	int 0x15
		1021	pop es
		1022	pop dx cx
		1023	test ah, ah
		1024	jnz sayerr_floppy
		1025	add dword [si+83+2], 51218
		1026	inc dh
		1027	cmp dh, 2
		1028	jnz .a1
		1029	mov dh, 0
		1030	inc ch
		1031	cmp ch, 80
		1032	jae ok_sys_on_floppy
		1033	pusha
		1034	mov al, ch
		1035	shr ch, 2
		1036	add al, ch
		1037	aam
		1038	xchg al, ah
		1039	add ax, '00'
		1040	mov si, pros
		1041	mov [si], ax
		1042	call printplain
		1043	popa
		1044	jmp .a1
		1045	.nocd:
		1046	; no - read only used sectors from floppy
		1047	; now load floppy image to memory
		1048	; at first load boot sector and first FAT table
		1049
		1050	; read only first sector and fill variables
		1051	mov cx, 0x0001 ; first logical sector
		1052	xor dx, dx ; head = 0, drive = 0 (a:)
		1053	mov al, 1 ; read one sector
		1054	mov bx, 0xB000 ; es:bx -> data area
		1055	call boot_read_floppy
		1056	; fill the necessary parameters to work with a floppy
		1057	mov ax, word [es:bx+24]
		1058	mov word [BPB_SecPerTrk], ax
		1059	mov ax, word [es:bx+26]
		1060	mov word [BPB_NumHeads], ax
		1061	mov ax, word [es:bx+17]
		1062	mov word [BPB_RootEntCnt], ax
		1063	mov ax, word [es:bx+14]
		1064	mov word [BPB_RsvdSecCnt], ax
		1065	mov ax, word [es:bx+19]
		1066	mov word [BPB_TotSec16], ax
		1067	mov al, byte [es:bx+13]
		1068	mov byte [BPB_SecPerClus], al
		1069	mov al, byte [es:bx+16]
		1070	mov byte [BPB_NumFATs], al
		1071	; 18.11.2008
		1072	mov ax, word [es:bx+22]
		1073	mov word [BPB_FATSz16], ax
		1074	mov cx, word [es:bx+11]
		1075	mov word [BPB_BytsPerSec], cx
		1076
		1077	; count of clusters in FAT12 ((size_of_FAT*2)/3)
		1078	; mov ax, word [BPB_FATSz16]
		1079	; mov cx, word [BPB_BytsPerSec]
		1080	;end 18.11.2008
		1081	xor dx, dx
		1082	mul cx
		1083	shl ax, 1
		1084	mov cx, 3
		1085	div cx ; now ax - number of clusters in FAT12
		1086	mov word [end_of_FAT], ax
		1087
		1088	; load first FAT table
		1089	mov cx, 0x0002 ; startcyl,startsector ; TODO!!!!!
		1090	xor dx, dx ; starthead,drive
		1091	mov al, byte [BPB_FATSz16] ; no of sectors to read
		1092	add bx, word [BPB_BytsPerSec] ; es:bx -> data area
		1093	call boot_read_floppy
		1094	mov bx, 0xB000
		1095
		1096	; and copy them to extended memory
		1097	mov si, movedesc
		1098	mov [si+8*2+3], bh ; from
		1099
		1100	mov ax, word [BPB_BytsPerSec]
		1101	shr ax, 1 ; words per sector
		1102	mov cx, word [BPB_RsvdSecCnt]
		1103	add cx, word [BPB_FATSz16]
		1104	mul cx
		1105	push ax ; save to stack count of words in boot+FAT
		1106	xchg ax, cx
		1107
		1108	push es
		1109	push ds
		1110	pop es
		1111	mov ah, 0x87
		1112	int 0x15
		1113	pop es
		1114	test ah, ah
		1115	jz @f
		1116	sayerr_floppy:
		1117	mov dx, 0x3f2
		1118	mov al, 0
		1119	out dx, al
		1120	sayerr_memmove:
		1121	mov si, memmovefailed
		1122	jmp sayerr_plain
		1123	@@:
		1124	pop ax ; restore from stack count of words in boot+FAT
		1125	shl ax, 1 ; make bytes count from count of words
		1126	and eax, 0ffffh
		1127	add dword [si+8*3+2], eax
		1128
		1129	; copy first FAT to second copy
		1130	; TODO: BPB_NumFATs !!!!!
		1131	add bx, word [BPB_BytsPerSec] ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!!
		1132	mov byte [si+8*2+3], bh ; bx - begin of FAT
		1133
		1134	mov ax, word [BPB_BytsPerSec]
		1135	shr ax, 1 ; words per sector
		1136	mov cx, word [BPB_FATSz16]
		1137	mul cx
		1138	mov cx, ax ; cx - count of words in FAT
		1139
		1140	push es
		1141	push ds
		1142	pop es
		1143	mov ah, 0x87
		1144	int 0x15
		1145	pop es
		1146	test ah, ah
		1147	jnz sayerr_floppy
		1148
		1149	mov ax, cx
		1150	shl ax, 1
		1151	and eax, 0ffffh ; ax - count of bytes in FAT
		1152	add dword [si+8*3+2], eax
		1153
		1154	; reading RootDir
		1155	; TODO: BPB_NumFATs
		1156	add bx, ax
		1157	add bx, 100h
		1158	and bx, 0ff00h ; bx - place in buffer to write RootDir
		1159	push bx
		1160
		1161	mov bx, word [BPB_BytsPerSec]
		1162	shr bx, 5 ; divide bx by 32
		1163	mov ax, word [BPB_RootEntCnt]
		1164	xor dx, dx
		1165	div bx
		1166	push ax ; ax - count of RootDir sectors
		1167
		1168	mov ax, word [BPB_FATSz16]
		1169	xor cx, cx
		1170	mov cl, byte [BPB_NumFATs]
		1171	mul cx
		1172	add ax, word [BPB_RsvdSecCnt] ; ax - first sector of RootDir
		1173
		1174	mov word [FirstDataSector], ax
		1175	pop bx
		1176	push bx
		1177	add word [FirstDataSector], bx ; Begin of data region of floppy
		1178
		1179	; read RootDir
		1180	call conv_abs_to_THS
		1181	pop ax
		1182	pop bx ; place in buffer to write
		1183	push ax
		1184	call boot_read_floppy ; read RootDir into buffer
		1185	; copy RootDir
		1186	mov byte [si+8*2+3], bh ; from buffer
		1187	pop ax ; ax = count of RootDir sectors
		1188	mov cx, word [BPB_BytsPerSec]
		1189	mul cx
		1190	shr ax, 1
		1191	mov cx, ax ; count of words to copy
		1192	push es
		1193	push ds
		1194	pop es
		1195	mov ah, 0x87
		1196	int 0x15
		1197	pop es
		1198
		1199	mov ax, cx
		1200	shl ax, 1
		1201	and eax, 0ffffh ; ax - count of bytes in RootDir
		1202	add dword [si+8*3+2], eax ; add count of bytes copied
		1203
		1204	; Reading data clusters from floppy
		1205	mov byte [si+8*2+3], bh
		1206	push bx
		1207
		1208	mov di, 2 ; First data cluster
		1209	.read_loop:
		1210	mov bx, di
		1211	shr bx, 1 ; bx+di = di*1.5
		1212	jnc .even
		1213	test word [es:bx+di+0xB200], 0xFFF0 ; TODO: may not be 0xB200 !!!
		1214	jmp @f
		1215	.even:
		1216	test word [es:bx+di+0xB200], 0xFFF ; TODO: may not be 0xB200 !!!
		1217
		1218	@@:
		1219	jz .skip
		1220	; read cluster di
		1221	;.read:
		1222	;conv cluster di to abs. sector ax
		1223	; ax = (N-2) * BPB_SecPerClus + FirstDataSector
		1224	mov ax, di
		1225	sub ax, 2
		1226	xor bx, bx
		1227	mov bl, byte [BPB_SecPerClus]
		1228	mul bx
		1229	add ax, word [FirstDataSector]
		1230	call conv_abs_to_THS
		1231	pop bx
		1232	push bx
		1233	mov al, byte [BPB_SecPerClus] ; number of sectors in cluster
		1234	call boot_read_floppy
		1235	push es
		1236	push ds
		1237	pop es
		1238	pusha
		1239	;
		1240	mov ax, word [BPB_BytsPerSec]
		1241	xor cx, cx
		1242	mov cl, byte [BPB_SecPerClus]
		1243	mul cx
		1244	shr ax, 1 ; ax = (BPB_BytsPerSec * BPB_SecPerClus)/2
		1245	mov cx, ax ; number of words to copy (count words in cluster)
		1246	;
		1247	mov ah, 0x87
		1248	int 0x15 ; copy data
		1249	test ah, ah
		1250	popa
		1251	pop es
		1252	jnz sayerr_floppy
		1253	; skip cluster di
		1254	.skip:
		1255	mov ax, word [BPB_BytsPerSec]
		1256	xor cx, cx
		1257	mov cl, byte [BPB_SecPerClus]
		1258	mul cx
		1259	and eax, 0ffffh ; ax - count of bytes in cluster
		1260	add dword [si+8*3+2], eax
		1261
		1262	mov ax, word [end_of_FAT] ; max cluster number
		1263	pusha
		1264	; draw percentage
		1265	; total clusters: ax
		1266	; read clusters: di
		1267	xchg ax, di
		1268	mov cx, 100
		1269	mul cx
		1270	div di
		1271	aam
		1272	xchg al, ah
		1273	add ax, '00'
		1274	mov si, pros
		1275	cmp [si], ax
		1276	jz @f
		1277	mov [si], ax
		1278	call printplain
		1279	@@:
		1280	popa
		1281	inc di
		1282	cmp di, word [end_of_FAT] ; max number of cluster
		1283	jnz .read_loop
		1284	pop bx ; clear stack
		1285
		1286	ok_sys_on_floppy:
		1287	mov si, backspace2
		1288	call printplain
		1289	mov si, okt
		1290	call printplain
		1291	no_sys_on_floppy:
		1292	xor ax, ax ; reset drive
		1293	xor dx, dx
		1294	int 0x13
		1295	mov dx, 0x3f2 ; floppy motor off
		1296	mov al, 0
		1297	out dx, al
		1298
		1299	if defined extended_primary_loader
		1300	cmp [boot_dev], 1
		1301	jne no_sys_from_primary
		1302	; load kolibri.img using callback from primary loader
		1303	and word [movedesc + 24 + 2], 0
		1304	mov byte [movedesc + 24 + 4], 10h
		1305	; read in blocks of 64K until file is fully loaded
		1306	mov ax, 1
		1307	.repeat:
		1308	mov di, image_file_struct
		1309	call [bootcallback]
		1310	push cs
		1311	pop ds
		1312	push cs
		1313	pop es
		1314	cmp bx, 1
		1315	ja sayerr_badsect
		1316	push bx
		1317	mov si, movedesc
		1318	and word [si + 16 + 2], 0
		1319	mov byte [si + 16 + 4], 4
		1320	mov ah, 87h
		1321	mov cx, 8000h
		1322	int 15h
		1323	pop bx
		1324	test ah, ah
		1325	jnz sayerr_memmove
		1326	inc byte [si + 24 + 4]
		1327	test bx, bx
		1328	jz no_sys_from_primary
		1329	mov ax, 2
		1330	jmp .repeat
		1331	no_sys_from_primary:
		1332	end if
		1333
		1334	; SET GRAPHICS
		1335
		1336	xor ax, ax
		1337	mov es, ax
		1338
2466	Serge	1339	mov ax, [es:BOOT_VESA_MODE] ; vga & 320x200
2288	clevermous	1340	mov bx, ax
		1341	cmp ax, 0x13
		1342	je setgr
		1343	cmp ax, 0x12
		1344	je setgr
		1345	mov ax, 0x4f02 ; Vesa
		1346	setgr:
		1347	int 0x10
		1348	test ah, ah
		1349	mov si, fatalsel
		1350	jnz v_mode_error
		1351	; set mode 0x12 graphics registers:
		1352	cmp bx, 0x12
		1353	jne gmok2
		1354
		1355	mov al, 0x05
		1356	mov dx, 0x03ce
		1357	push dx
		1358	out dx, al ; select GDC mode register
		1359	mov al, 0x02
		1360	inc dx
		1361	out dx, al ; set write mode 2
		1362
		1363	mov al, 0x02
		1364	mov dx, 0x03c4
		1365	out dx, al ; select VGA sequencer map mask register
		1366	mov al, 0x0f
		1367	inc dx
		1368	out dx, al ; set mask for all planes 0-3
		1369
		1370	mov al, 0x08
		1371	pop dx
		1372	out dx, al ; select GDC bit mask register
		1373	; for writes to 0x03cf
		1374	gmok2:
		1375	push ds
		1376	pop es

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(root)/kernel/trunk/boot/bootcode.inc – Rev 2466