WebSVN – Kolibri OS – Blame – /kernel/trunk/blkdev/hd_drv.inc

Rev	Author	Line No.	Line
2288	clevermous	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
3742	clevermous	3	;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
2288	clevermous	4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
		8	$Revision: 3762 $
		9
		10
		11	; Low-level driver for HDD access
		12	; DMA support by Mario79
		13	; Access through BIOS by diamond
3712	mario79	14	; LBA48 support by Mario79
		15	;-----------------------------------------------------------------------------
3742	clevermous	16	struct HD_DATA
		17	hdbase dd ?
		18	hdid dd ?
		19	hdpos dd ?
		20	ends
		21
		22	iglobal
2288	clevermous	23	align 4
3742	clevermous	24	ide_callbacks:
		25	dd ide_callbacks.end - ide_callbacks ; strucsize
		26	dd 0 ; no close function
		27	dd 0 ; no closemedia function
		28	dd ide_querymedia
		29	dd ide_read
		30	dd ide_write
		31	dd 0 ; no flush function
		32	dd 0 ; use default cache size
		33	.end:
2288	clevermous	34
3742	clevermous	35	bd_callbacks:
		36	dd bd_callbacks.end - bd_callbacks ; strucsize
		37	dd 0 ; no close function
		38	dd 0 ; no closemedia function
		39	dd bd_querymedia
		40	dd bd_read_interface
		41	dd bd_write_interface
		42	dd 0 ; no flush function
		43	dd 0 ; use default cache size
		44	.end:
2288	clevermous	45
3742	clevermous	46	hd0_data HD_DATA ?, 0, 1
		47	hd1_data HD_DATA ?, 0x10, 2
		48	hd2_data HD_DATA ?, 0, 3
		49	hd3_data HD_DATA ?, 0x10, 4
		50	endg
2288	clevermous	51
3742	clevermous	52	uglobal
		53	ide_mutex MUTEX
		54	ide_channel1_mutex MUTEX
		55	ide_channel2_mutex MUTEX
		56	endg
2288	clevermous	57
3742	clevermous	58	proc ide_read stdcall uses edi, \
		59	hd_data, buffer, startsector:qword, numsectors
		60	; hd_data = pointer to hd*_data
		61	; buffer = pointer to buffer for data
		62	; startsector = 64-bit start sector
		63	; numsectors = pointer to number of sectors on input,
		64	; must be filled with number of sectors really read
		65	locals
		66	sectors_todo dd ?
		67	channel_lock dd ?
		68	endl
		69	; 1. Initialize number of sectors: get number of requested sectors
		70	; and say that no sectors were read yet.
		71	mov ecx, [numsectors]
		72	mov eax, [ecx]
		73	mov dword [ecx], 0
		74	mov [sectors_todo], eax
		75	; 2. Acquire the global lock.
		76	mov ecx, ide_mutex
		77	call mutex_lock
		78	mov ecx, ide_channel2_mutex
		79	mov eax, [hd_data]
		80	cmp [eax+HD_DATA.hdbase], 0x1F0
		81	jne .IDE_Channel_2
		82	mov ecx, ide_channel1_mutex
		83	.IDE_Channel_2:
		84	mov [channel_lock], ecx
		85	call mutex_lock
		86	; 3. Convert parameters to the form suitable for worker procedures.
		87	; Underlying procedures do not know about 64-bit sectors.
		88	; Worker procedures use global variables and edi for [buffer].
		89	cmp dword [startsector+4], 0
		90	jnz .fail
		91	and [hd_error], 0
		92	mov ecx, [hd_data]
		93	mov eax, [ecx+HD_DATA.hdbase]
		94	mov [hdbase], eax
		95	mov eax, [ecx+HD_DATA.hdid]
		96	mov [hdid], eax
		97	mov eax, [ecx+HD_DATA.hdpos]
		98	mov [hdpos], eax
		99	mov eax, dword [startsector]
		100	mov edi, [buffer]
		101	; 4. Worker procedures take one sectors per time, so loop over all sectors to read.
		102	.sectors_loop:
2288	clevermous	103	; DMA read is permitted if [allow_dma_access]=1 or 2
		104	cmp [allow_dma_access], 2
		105	ja .nodma
		106	cmp [dma_hdd], 1
		107	jnz .nodma
		108	call hd_read_dma
		109	jmp @f
		110	.nodma:
		111	call hd_read_pio
		112	@@:
		113	cmp [hd_error], 0
3742	clevermous	114	jnz .fail
		115	mov ecx, [numsectors]
		116	inc dword [ecx] ; one more sector is read
		117	dec [sectors_todo]
		118	jz .done
		119	inc eax
		120	jnz .sectors_loop
		121	; 5. Loop is done, either due to error or because everything is done.
		122	; Release the global lock and return the corresponding status.
		123	.fail:
		124	mov ecx, [channel_lock]
		125	call mutex_unlock
		126	mov ecx, ide_mutex
		127	call mutex_unlock
		128	or eax, -1
		129	ret
		130	.done:
		131	mov ecx, [channel_lock]
		132	call mutex_unlock
		133	mov ecx, ide_mutex
		134	call mutex_unlock
		135	xor eax, eax
		136	ret
		137	endp
3712	mario79	138
3742	clevermous	139	proc ide_write stdcall uses esi edi, \
		140	hd_data, buffer, startsector:qword, numsectors
		141	; hd_data = pointer to hd*_data
		142	; buffer = pointer to buffer with data
		143	; startsector = 64-bit start sector
		144	; numsectors = pointer to number of sectors on input,
		145	; must be filled with number of sectors really written
		146	locals
		147	sectors_todo dd ?
		148	channel_lock dd ?
		149	endl
		150	; 1. Initialize number of sectors: get number of requested sectors
		151	; and say that no sectors were read yet.
		152	mov ecx, [numsectors]
		153	mov eax, [ecx]
		154	mov dword [ecx], 0
		155	mov [sectors_todo], eax
		156	; 2. Acquire the global lock.
		157	mov ecx, ide_mutex
		158	call mutex_lock
		159	mov ecx, ide_channel2_mutex
		160	mov eax, [hd_data]
		161	cmp [eax+HD_DATA.hdbase], 0x1F0
		162	jne .IDE_Channel_2
		163	mov ecx, ide_channel1_mutex
		164	.IDE_Channel_2:
		165	mov [channel_lock], ecx
		166	call mutex_lock
		167	; 3. Convert parameters to the form suitable for worker procedures.
		168	; Underlying procedures do not know about 64-bit sectors.
		169	; Worker procedures use global variables and esi for [buffer].
		170	cmp dword [startsector+4], 0
		171	jnz .fail
		172	and [hd_error], 0
		173	mov ecx, [hd_data]
		174	mov eax, [ecx+HD_DATA.hdbase]
		175	mov [hdbase], eax
		176	mov eax, [ecx+HD_DATA.hdid]
		177	mov [hdid], eax
		178	mov eax, [ecx+HD_DATA.hdpos]
		179	mov [hdpos], eax
		180	mov esi, [buffer]
		181	lea edi, [startsector]
		182	mov [cache_chain_ptr], edi
		183	; 4. Worker procedures take max 16 sectors per time,
		184	; loop until all sectors will be processed.
		185	.sectors_loop:
		186	mov ecx, 16
		187	cmp ecx, [sectors_todo]
		188	jbe @f
		189	mov ecx, [sectors_todo]
		190	@@:
		191	mov [cache_chain_size], cl
		192	; DMA write is permitted only if [allow_dma_access]=1
		193	cmp [allow_dma_access], 2
		194	jae .nodma
		195	cmp [dma_hdd], 1
		196	jnz .nodma
		197	call cache_write_dma
		198	jmp .common
		199	.nodma:
		200	mov [cache_chain_size], 1
		201	call cache_write_pio
		202	.common:
		203	cmp [hd_error], 0
		204	jnz .fail
		205	movzx ecx, [cache_chain_size]
		206	mov eax, [numsectors]
		207	add [eax], ecx
		208	sub [sectors_todo], ecx
		209	jz .done
		210	add [edi], ecx
		211	jc .fail
		212	shl ecx, 9
		213	add esi, ecx
		214	jmp .sectors_loop
		215	; 5. Loop is done, either due to error or because everything is done.
		216	; Release the global lock and return the corresponding status.
		217	.fail:
		218	mov ecx, [channel_lock]
		219	call mutex_unlock
		220	mov ecx, ide_mutex
		221	call mutex_unlock
		222	or eax, -1
		223	ret
		224	.done:
		225	mov ecx, [channel_lock]
		226	call mutex_unlock
		227	mov ecx, ide_mutex
		228	call mutex_unlock
		229	xor eax, eax
		230	ret
		231	endp
2288	clevermous	232
3742	clevermous	233	; This is a stub.
		234	proc ide_querymedia stdcall, hd_data, mediainfo
		235	mov eax, [mediainfo]
		236	mov [eax+DISKMEDIAINFO.Flags], 0
		237	mov [eax+DISKMEDIAINFO.SectorSize], 512
		238	or dword [eax+DISKMEDIAINFO.Capacity], 0xFFFFFFFF
		239	or dword [eax+DISKMEDIAINFO.Capacity+4], 0xFFFFFFFF
		240	xor eax, eax
		241	ret
		242	endp
2288	clevermous	243
3742	clevermous	244	proc bd_read_interface stdcall uses edi, \
		245	userdata, buffer, startsector:qword, numsectors
		246	; userdata = old [hdpos] = 80h + index in NumBiosDisks
		247	; buffer = pointer to buffer for data
		248	; startsector = 64-bit start sector
		249	; numsectors = pointer to number of sectors on input,
		250	; must be filled with number of sectors really read
		251	locals
		252	sectors_todo dd ?
		253	endl
		254	; 1. Initialize number of sectors: get number of requested sectors
		255	; and say that no sectors were read yet.
		256	mov ecx, [numsectors]
		257	mov eax, [ecx]
		258	mov dword [ecx], 0
		259	mov [sectors_todo], eax
		260	; 2. Acquire the global lock.
		261	mov ecx, ide_mutex
		262	call mutex_lock
		263	; 3. Convert parameters to the form suitable for worker procedures.
		264	; Underlying procedures do not know about 64-bit sectors.
		265	; Worker procedures use global variables and edi for [buffer].
		266	cmp dword [startsector+4], 0
		267	jnz .fail
		268	and [hd_error], 0
		269	mov eax, [userdata]
		270	mov [hdpos], eax
		271	mov eax, dword [startsector]
		272	mov edi, [buffer]
		273	; 4. Worker procedures take one sectors per time, so loop over all sectors to read.
		274	.sectors_loop:
		275	call bd_read
		276	cmp [hd_error], 0
		277	jnz .fail
		278	mov ecx, [numsectors]
		279	inc dword [ecx] ; one more sector is read
		280	dec [sectors_todo]
		281	jz .done
		282	inc eax
		283	jnz .sectors_loop
		284	; 5. Loop is done, either due to error or because everything is done.
		285	; Release the global lock and return the corresponding status.
		286	.fail:
		287	mov ecx, ide_mutex
		288	call mutex_unlock
		289	or eax, -1
		290	ret
		291	.done:
		292	mov ecx, ide_mutex
		293	call mutex_unlock
		294	xor eax, eax
		295	ret
		296	endp
3712	mario79	297
3742	clevermous	298	proc bd_write_interface stdcall uses esi edi, \
		299	userdata, buffer, startsector:qword, numsectors
		300	; userdata = old [hdpos] = 80h + index in NumBiosDisks
		301	; buffer = pointer to buffer with data
		302	; startsector = 64-bit start sector
		303	; numsectors = pointer to number of sectors on input,
		304	; must be filled with number of sectors really written
		305	locals
		306	sectors_todo dd ?
		307	endl
		308	; 1. Initialize number of sectors: get number of requested sectors
		309	; and say that no sectors were read yet.
		310	mov ecx, [numsectors]
		311	mov eax, [ecx]
		312	mov dword [ecx], 0
		313	mov [sectors_todo], eax
		314	; 2. Acquire the global lock.
		315	mov ecx, ide_mutex
		316	call mutex_lock
		317	; 3. Convert parameters to the form suitable for worker procedures.
		318	; Underlying procedures do not know about 64-bit sectors.
		319	; Worker procedures use global variables and esi for [buffer].
		320	cmp dword [startsector+4], 0
		321	jnz .fail
		322	and [hd_error], 0
		323	mov eax, [userdata]
		324	mov [hdpos], eax
		325	mov esi, [buffer]
		326	lea edi, [startsector]
		327	mov [cache_chain_ptr], edi
		328	; 4. Worker procedures take max 16 sectors per time,
		329	; loop until all sectors will be processed.
		330	.sectors_loop:
		331	mov ecx, 16
		332	cmp ecx, [sectors_todo]
		333	jbe @f
		334	mov ecx, [sectors_todo]
		335	@@:
		336	mov [cache_chain_size], cl
		337	call bd_write_cache_chain
		338	cmp [hd_error], 0
		339	jnz .fail
		340	movzx ecx, [cache_chain_size]
		341	mov eax, [numsectors]
		342	add [eax], ecx
		343	sub [sectors_todo], ecx
		344	jz .done
		345	add [edi], ecx
		346	jc .fail
		347	shl ecx, 9
		348	add esi, ecx
		349	jmp .sectors_loop
		350	; 5. Loop is done, either due to error or because everything is done.
		351	; Release the global lock and return the corresponding status.
		352	.fail:
		353	mov ecx, ide_mutex
		354	call mutex_unlock
		355	or eax, -1
		356	ret
		357	.done:
		358	mov ecx, ide_mutex
		359	call mutex_unlock
		360	xor eax, eax
		361	ret
		362	endp
2288	clevermous	363
3742	clevermous	364	; This is a stub.
		365	proc bd_querymedia stdcall, hd_data, mediainfo
		366	mov eax, [mediainfo]
		367	mov [eax+DISKMEDIAINFO.Flags], 0
		368	mov [eax+DISKMEDIAINFO.SectorSize], 512
		369	or dword [eax+DISKMEDIAINFO.Capacity], 0xFFFFFFFF
		370	or dword [eax+DISKMEDIAINFO.Capacity+4], 0xFFFFFFFF
		371	xor eax, eax
		372	ret
		373	endp
3712	mario79	374
		375	;-----------------------------------------------------------------------------
2288	clevermous	376	align 4
3742	clevermous	377	; input: eax = sector, edi -> buffer
		378	; output: edi = edi + 512
2288	clevermous	379	hd_read_pio:
		380	push eax edx
		381
3712	mario79	382	; Select the desired drive
3702	mario79	383	mov edx, [hdbase]
		384	add edx, 6 ;адрес регистра головок
		385	mov al, byte [hdid]
		386	add al, 128+64+32
		387	out dx, al; номер головки/номер диска
3711	clevermous	388
2288	clevermous	389	call wait_for_hd_idle
		390	cmp [hd_error], 0
		391	jne hd_read_error
3711	clevermous	392
3702	mario79	393	; ATA with 28 or 48 bit for sector number?
		394	mov eax, [esp+4]
		395	cmp eax, 0x10000000
3711	clevermous	396	jae .lba48
3712	mario79	397	;--------------------------------------
3702	mario79	398	.lba28:
3706	mario79	399	pushfd
2288	clevermous	400	cli
		401	xor eax, eax
		402	mov edx, [hdbase]
		403	inc edx
3706	mario79	404	out dx, al ; ATA Features регистр "особенностей"
2288	clevermous	405	inc edx
		406	inc eax
3706	mario79	407	out dx, al ; ATA Sector Counter счётчик секторов
2288	clevermous	408	inc edx
3706	mario79	409	mov eax, [esp+4+4]
		410	out dx, al ; LBA Low LBA (7:0)
2288	clevermous	411	shr eax, 8
		412	inc edx
3706	mario79	413	out dx, al ; LBA Mid LBA (15:8)
2288	clevermous	414	shr eax, 8
		415	inc edx
3706	mario79	416	out dx, al ; LBA High LBA (23:16)
2288	clevermous	417	shr eax, 8
		418	inc edx
3706	mario79	419	and al, 1+2+4+8 ; LBA (27:24)
2288	clevermous	420	add al, byte [hdid]
		421	add al, 128+64+32
3706	mario79	422	out dx, al ; номер головки/номер диска
2288	clevermous	423	inc edx
3711	clevermous	424	mov al, 20h ; READ SECTOR(S)
3706	mario79	425	out dx, al ; ATACommand регистр команд
		426	popfd
3711	clevermous	427	jmp .continue
3712	mario79	428	;--------------------------------------
3702	mario79	429	.lba48:
3706	mario79	430	pushfd
3702	mario79	431	cli
		432	xor eax, eax
		433	mov edx, [hdbase]
		434	inc edx
		435	out dx, al ; Features Previous Reserved
		436	out dx, al ; Features Current Reserved
		437	inc edx
		438	out dx, al ; Sector Count Previous Sector count (15:8)
		439	inc eax
		440	out dx, al ; Sector Count Current Sector count (7:0)
		441	inc edx
3706	mario79	442	mov eax, [esp+4+4]
3711	clevermous	443	rol eax, 8
3702	mario79	444	out dx, al ; LBA Low Previous LBA (31:24)
3712	mario79	445	xor eax, eax ; because only 32 bit cache
3702	mario79	446	inc edx
		447	out dx, al ; LBA Mid Previous LBA (39:32)
		448	inc edx
		449	out dx, al ; LBA High Previous LBA (47:40)
3711	clevermous	450	sub edx, 2
3706	mario79	451	mov eax, [esp+4+4]
3702	mario79	452	out dx, al ; LBA Low Current LBA (7:0)
		453	shr eax, 8
		454	inc edx
		455	out dx, al ; LBA Mid Current LBA (15:8)
		456	shr eax, 8
		457	inc edx
		458	out dx, al ; LBA High Current LBA (23:16)
		459	inc edx
		460	mov al, byte [hdid]
		461	add al, 128+64+32
3712	mario79	462	out dx, al ; номер головки/номер диска
3702	mario79	463	inc edx
3711	clevermous	464	mov al, 24h ; READ SECTOR(S) EXT
3712	mario79	465	out dx, al ; ATACommand регистр команд
3706	mario79	466	popfd
3712	mario79	467	;--------------------------------------
3702	mario79	468	.continue:
2288	clevermous	469	call wait_for_sector_buffer
		470
		471	cmp [hd_error], 0
		472	jne hd_read_error
		473
3712	mario79	474	pushfd
2288	clevermous	475	cli
3712	mario79	476
2288	clevermous	477	mov ecx, 256
		478	mov edx, [hdbase]
		479	cld
		480	rep insw
3712	mario79	481	popfd
2288	clevermous	482
		483	pop edx eax
		484	ret
3712	mario79	485	;-----------------------------------------------------------------------------
2288	clevermous	486	align 4
3742	clevermous	487	; edi -> sector, esi -> data
2288	clevermous	488	cache_write_pio:
3712	mario79	489	; Select the desired drive
3702	mario79	490	mov edx, [hdbase]
		491	add edx, 6 ;адрес регистра головок
		492	mov al, byte [hdid]
		493	add al, 128+64+32
3712	mario79	494	out dx, al ; номер головки/номер диска
3702	mario79	495
2288	clevermous	496	call wait_for_hd_idle
		497	cmp [hd_error], 0
		498	jne hd_write_error
		499
3706	mario79	500	; ATA with 28 or 48 bit for sector number?
3742	clevermous	501	mov eax, [edi]
3706	mario79	502	cmp eax, 0x10000000
		503	jae .lba48
3712	mario79	504	;--------------------------------------
3706	mario79	505	.lba28:
		506	pushfd
2288	clevermous	507	cli
		508	xor eax, eax
		509	mov edx, [hdbase]
		510	inc edx
3706	mario79	511	out dx, al ; ATA Features регистр "особенностей"
2288	clevermous	512	inc edx
		513	inc eax
3706	mario79	514	out dx, al ; ATA Sector Counter счётчик секторов
2288	clevermous	515	inc edx
3742	clevermous	516	mov eax, [edi] ; eax = sector to write
3706	mario79	517	out dx, al ; LBA Low LBA (7:0)
2288	clevermous	518	shr eax, 8
		519	inc edx
3706	mario79	520	out dx, al ; LBA Mid LBA (15:8)
2288	clevermous	521	shr eax, 8
		522	inc edx
3706	mario79	523	out dx, al ; LBA High LBA (23:16)
2288	clevermous	524	shr eax, 8
		525	inc edx
3706	mario79	526	and al, 1+2+4+8 ; LBA (27:24)
2288	clevermous	527	add al, byte [hdid]
		528	add al, 128+64+32
3706	mario79	529	out dx, al ; номер головки/номер диска
2288	clevermous	530	inc edx
3706	mario79	531	mov al, 30h ; WRITE SECTOR(S)
		532	out dx, al ; ATACommand регистр команд
		533	popfd
3711	clevermous	534	jmp .continue
3712	mario79	535	;--------------------------------------
3706	mario79	536	.lba48:
		537	pushfd
		538	cli
		539	xor eax, eax
		540	mov edx, [hdbase]
		541	inc edx
		542	out dx, al ; Features Previous Reserved
		543	out dx, al ; Features Current Reserved
		544	inc edx
		545	out dx, al ; Sector Count Previous Sector count (15:8)
		546	inc eax
		547	out dx, al ; Sector Count Current Sector count (7:0)
		548	inc edx
3742	clevermous	549	mov eax, [edi]
3711	clevermous	550	rol eax, 8
3706	mario79	551	out dx, al ; LBA Low Previous LBA (31:24)
3712	mario79	552	xor eax, eax ; because only 32 bit cache
3706	mario79	553	inc edx
		554	out dx, al ; LBA Mid Previous LBA (39:32)
		555	inc edx
		556	out dx, al ; LBA High Previous LBA (47:40)
3711	clevermous	557	sub edx, 2
3742	clevermous	558	mov eax, [edi]
3706	mario79	559	out dx, al ; LBA Low Current LBA (7:0)
		560	shr eax, 8
		561	inc edx
		562	out dx, al ; LBA Mid Current LBA (15:8)
		563	shr eax, 8
		564	inc edx
		565	out dx, al ; LBA High Current LBA (23:16)
		566	inc edx
		567	mov al, byte [hdid]
		568	add al, 128+64+32
3712	mario79	569	out dx, al ; номер головки/номер диска
3706	mario79	570	inc edx
3711	clevermous	571	mov al, 34h ; WRITE SECTOR(S) EXT
3712	mario79	572	out dx, al ; ATACommand регистр команд
3706	mario79	573	popfd
3712	mario79	574	;--------------------------------------
3706	mario79	575	.continue:
2288	clevermous	576	call wait_for_sector_buffer
		577
		578	cmp [hd_error], 0
		579	jne hd_write_error
		580
		581	push ecx esi
		582
3712	mario79	583	pushfd
2288	clevermous	584	cli
		585	mov ecx, 256
		586	mov edx, [hdbase]
		587	cld
		588	rep outsw
3712	mario79	589	popfd
2288	clevermous	590
		591	pop esi ecx
		592	ret
3712	mario79	593	;-----------------------------------------------------------------------------
		594	align 4
2288	clevermous	595	save_hd_wait_timeout:
		596	push eax
		597	mov eax, [timer_ticks]
		598	add eax, 300 ; 3 sec timeout
		599	mov [hd_wait_timeout], eax
		600	pop eax
		601	ret
3712	mario79	602	;-----------------------------------------------------------------------------
2288	clevermous	603	align 4
		604	check_hd_wait_timeout:
		605	push eax
		606	mov eax, [hd_wait_timeout]
		607	cmp [timer_ticks], eax
		608	jg hd_timeout_error
3712	mario79	609
2288	clevermous	610	pop eax
		611	mov [hd_error], 0
		612	ret
3712	mario79	613	;-----------------------------------------------------------------------------
2288	clevermous	614	hd_timeout_error:
3712	mario79	615	if lang eq sp
		616	DEBUGF 1,"K : FS - HD tiempo de espera agotado\n"
		617	else
		618	DEBUGF 1,"K : FS - HD timeout\n"
		619	end if
2288	clevermous	620	mov [hd_error], 1
		621	pop eax
		622	ret
3712	mario79	623	;-----------------------------------------------------------------------------
2288	clevermous	624	hd_read_error:
3712	mario79	625	if lang eq sp
		626	DEBUGF 1,"K : FS - HD error de lectura\n"
		627	else
		628	DEBUGF 1,"K : FS - HD read error\n"
		629	end if
2288	clevermous	630	pop edx eax
		631	ret
3712	mario79	632	;-----------------------------------------------------------------------------
		633	hd_write_error_dma:
		634	pop esi
2288	clevermous	635	hd_write_error:
3309	esevece	636	if lang eq sp
		637	DEBUGF 1,"K : FS - HD error de escritura\n"
		638	else
		639	DEBUGF 1,"K : FS - HD write error\n"
		640	end if
2288	clevermous	641	ret
3712	mario79	642	;-----------------------------------------------------------------------------
2288	clevermous	643	hd_lba_error:
3712	mario79	644	if lang eq sp
		645	DEBUGF 1,"K : FS - HD error en LBA\n"
		646	else
		647	DEBUGF 1,"K : FS - HD LBA error\n"
		648	end if
2288	clevermous	649	jmp LBA_read_ret
3712	mario79	650	;-----------------------------------------------------------------------------
2288	clevermous	651	align 4
		652	wait_for_hd_idle:
		653	push eax edx
		654
		655	call save_hd_wait_timeout
		656
		657	mov edx, [hdbase]
		658	add edx, 0x7
3712	mario79	659	;--------------------------------------
		660	align 4
		661	wfhil1:
2288	clevermous	662	call check_hd_wait_timeout
		663	cmp [hd_error], 0
		664	jne @f
		665
		666	in al, dx
		667	test al, 128
		668	jnz wfhil1
		669
3712	mario79	670	@@:
2288	clevermous	671	pop edx eax
		672	ret
3712	mario79	673	;-----------------------------------------------------------------------------
2288	clevermous	674	align 4
		675	wait_for_sector_buffer:
		676	push eax edx
		677
		678	mov edx, [hdbase]
		679	add edx, 0x7
		680
		681	call save_hd_wait_timeout
3712	mario79	682	;--------------------------------------
		683	align 4
		684	hdwait_sbuf: ; wait for sector buffer to be ready
2288	clevermous	685	call check_hd_wait_timeout
		686	cmp [hd_error], 0
		687	jne @f
		688
		689	in al, dx
		690	test al, 8
		691	jz hdwait_sbuf
		692
		693	mov [hd_error], 0
		694
		695	cmp [hd_setup], 1 ; do not mark error for setup request
		696	je buf_wait_ok
		697
		698	test al, 1 ; previous command ended up with an error
		699	jz buf_wait_ok
3712	mario79	700	@@:
2288	clevermous	701	mov [hd_error], 1
		702
3712	mario79	703	buf_wait_ok:
2288	clevermous	704	pop edx eax
		705	ret
3712	mario79	706	;-----------------------------------------------------------------------------
3762	mario79	707	irq14_num equ byte 14
		708	irq15_num equ byte 15
		709	;-----------------------------------------------------------------------------
2288	clevermous	710	align 4
		711	wait_for_sector_dma_ide0:
		712	push eax
		713	push edx
		714	call save_hd_wait_timeout
3712	mario79	715	;--------------------------------------
		716	align 4
2288	clevermous	717	.wait:
		718	call change_task
3762	mario79	719	cmp [IDE_common_irq_param], irq14_num
2288	clevermous	720	jnz .done
3762	mario79	721
2288	clevermous	722	call check_hd_wait_timeout
		723	cmp [hd_error], 0
		724	jz .wait
3762	mario79	725
		726	mov [IDE_common_irq_param], 0
2288	clevermous	727	mov dx, [IDEContrRegsBaseAddr]
		728	mov al, 0
		729	out dx, al
		730	.done:
		731	pop edx
		732	pop eax
		733	ret
3712	mario79	734	;-----------------------------------------------------------------------------
2288	clevermous	735	align 4
		736	wait_for_sector_dma_ide1:
		737	push eax
		738	push edx
		739	call save_hd_wait_timeout
3712	mario79	740	;--------------------------------------
		741	align 4
2288	clevermous	742	.wait:
		743	call change_task
3762	mario79	744	cmp [IDE_common_irq_param], irq15_num
2288	clevermous	745	jnz .done
3762	mario79	746
2288	clevermous	747	call check_hd_wait_timeout
		748	cmp [hd_error], 0
		749	jz .wait
3762	mario79	750
		751	mov [IDE_common_irq_param], 0
2288	clevermous	752	mov dx, [IDEContrRegsBaseAddr]
		753	add dx, 8
		754	mov al, 0
		755	out dx, al
		756	.done:
		757	pop edx
		758	pop eax
		759	ret
3712	mario79	760	;-----------------------------------------------------------------------------
2288	clevermous	761	iglobal
		762	align 4
		763	; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary
		764	IDE_descriptor_table:
3712	mario79	765	dd IDE_DMA
		766	dw 0x2000
		767	dw 0x8000
2288	clevermous	768
3712	mario79	769	dma_cur_sector dd not 40h
		770	dma_hdpos dd 0
3762	mario79	771	IDE_common_irq_param db 0
2288	clevermous	772	endg
3712	mario79	773	;-----------------------------------------------------------------------------
2288	clevermous	774	uglobal
		775	; all uglobals are zeroed at boot
3712	mario79	776	dma_process dd 0
		777	dma_slot_ptr dd 0
		778	cache_chain_pos dd 0
		779	cache_chain_ptr dd 0
		780	cache_chain_size db 0
		781	cache_chain_started db 0
		782	dma_task_switched db 0
		783	dma_hdd db 0
		784	allow_dma_access db 0
2288	clevermous	785	endg
3712	mario79	786	;-----------------------------------------------------------------------------
2288	clevermous	787	align 4
3762	mario79	788	IDE_common_irq_handler:
2288	clevermous	789	pushfd
		790	cli
		791	pushad
3762	mario79	792
		793	xor ebx, ebx
		794	mov eax, IDE_common_irq_param
		795	cmp [eax], irq15_num
		796	mov [eax], ebx
		797	je @f
		798	;--------------------------------------
2288	clevermous	799	mov dx, [IDEContrRegsBaseAddr]
		800	mov al, 0
		801	out dx, al
3762	mario79	802	jmp .end
		803	;--------------------------------------
2288	clevermous	804	align 4
3762	mario79	805	@@:
2288	clevermous	806	mov dx, [IDEContrRegsBaseAddr]
		807	add dx, 8
		808	mov al, 0
		809	out dx, al
3762	mario79	810	;--------------------------------------
		811	align 4
		812	.end:
2288	clevermous	813	popad
		814	popfd
3762	mario79	815	mov al, 1
2288	clevermous	816	ret
3712	mario79	817	;-----------------------------------------------------------------------------
2288	clevermous	818	align 4
		819	hd_read_dma:
		820	push eax
		821	push edx
		822	mov edx, [dma_hdpos]
		823	cmp edx, [hdpos]
		824	jne .notread
		825	mov edx, [dma_cur_sector]
		826	cmp eax, edx
		827	jb .notread
		828	add edx, 15
		829	cmp [esp+4], edx
		830	ja .notread
		831	mov eax, [esp+4]
		832	sub eax, [dma_cur_sector]
		833	shl eax, 9
		834	add eax, (OS_BASE+IDE_DMA)
3742	clevermous	835	push ecx esi
2288	clevermous	836	mov esi, eax
3712	mario79	837
2288	clevermous	838	mov ecx, 512/4
		839	cld
		840	rep movsd
3742	clevermous	841	pop esi ecx
2288	clevermous	842	pop edx
		843	pop eax
		844	ret
		845	.notread:
		846	mov eax, IDE_descriptor_table
		847	mov dword [eax], IDE_DMA
		848	mov word [eax+4], 0x2000
		849	sub eax, OS_BASE
		850	mov dx, [IDEContrRegsBaseAddr]
		851	cmp [hdbase], 0x1F0
		852	jz @f
		853	add edx, 8
		854	@@:
		855	push edx
		856	add edx, 4
		857	out dx, eax
		858	pop edx
		859	mov al, 0
		860	out dx, al
		861	add edx, 2
		862	mov al, 6
		863	out dx, al
3712	mario79	864
		865	; Select the desired drive
		866	mov edx, [hdbase]
		867	add edx, 6 ; адрес регистра головок
		868	mov al, byte [hdid]
		869	add al, 128+64+32
		870	out dx, al ; номер головки/номер диска
		871
2288	clevermous	872	call wait_for_hd_idle
		873	cmp [hd_error], 0
		874	jnz hd_read_error
3712	mario79	875
		876	; ATA with 28 or 48 bit for sector number?
		877	mov eax, [esp+4]
		878	; -10h because the PreCache hits the boundary between lba28 and lba48
		879	; 10h = 16 - size of PreCache
		880	cmp eax, 0x10000000-10h
		881	jae .lba48
		882	;--------------------------------------
		883	.lba28:
		884	pushfd
		885	cli
2288	clevermous	886	xor eax, eax
		887	mov edx, [hdbase]
		888	inc edx
3712	mario79	889	out dx, al ; ATA Features регистр "особенностей"
2288	clevermous	890	inc edx
3712	mario79	891	mov eax, 10h ; Sector Counter = 16 ; PreCache
		892	out dx, al ; ATA Sector Counter счётчик секторов
2288	clevermous	893	inc edx
3712	mario79	894	mov eax, [esp+4+4]
		895	out dx, al ; LBA Low LBA (7:0)
2288	clevermous	896	shr eax, 8
		897	inc edx
3712	mario79	898	out dx, al ; LBA Mid LBA (15:8)
2288	clevermous	899	shr eax, 8
		900	inc edx
3712	mario79	901	out dx, al ; LBA High LBA (23:16)
2288	clevermous	902	shr eax, 8
		903	inc edx
3712	mario79	904	and al, 0xF ; LBA (27:24)
2288	clevermous	905	add al, byte [hdid]
		906	add al, 11100000b
3712	mario79	907	out dx, al ; номер головки/номер диска
2288	clevermous	908	inc edx
3712	mario79	909	mov al, 0xC8 ; READ DMA
		910	out dx, al ; ATACommand регистр команд
		911	jmp .continue
		912	;--------------------------------------
		913	.lba48:
		914	pushfd
		915	cli
		916	xor eax, eax
		917	mov edx, [hdbase]
		918	inc edx
		919	out dx, al ; Features Previous Reserved
		920	out dx, al ; Features Current Reserved
		921	inc edx
		922	out dx, al ; Sector Count Previous Sector count (15:8)
		923	mov eax, 10h ; Sector Counter = 16 PreCache
		924	out dx, al ; Sector Count Current Sector count (7:0)
		925	inc edx
		926	mov eax, [esp+4+4]
		927	rol eax, 8
		928	out dx, al ; LBA Low Previous LBA (31:24)
		929	xor eax, eax ; because only 32 bit cache
		930	inc edx
		931	out dx, al ; LBA Mid Previous LBA (39:32)
		932	inc edx
		933	out dx, al ; LBA High Previous LBA (47:40)
		934	sub edx, 2
		935	mov eax, [esp+4+4]
		936	out dx, al ; LBA Low Current LBA (7:0)
		937	shr eax, 8
		938	inc edx
		939	out dx, al ; LBA Mid Current LBA (15:8)
		940	shr eax, 8
		941	inc edx
		942	out dx, al ; LBA High Current LBA (23:16)
		943	inc edx
		944	mov al, byte [hdid]
		945	add al, 128+64+32
		946	out dx, al ; номер головки/номер диска
		947	inc edx
		948	mov al, 25h ; READ DMA EXT
		949	out dx, al ; ATACommand регистр команд
		950	;--------------------------------------
		951	.continue:
2288	clevermous	952	mov dx, [IDEContrRegsBaseAddr]
3712	mario79	953	mov eax, [hd_address_table]
		954	cmp [hdbase], eax ; 0x1F0
2288	clevermous	955	jz @f
		956	add dx, 8
		957	@@:
		958	mov al, 9
		959	out dx, al
		960	mov eax, [CURRENT_TASK]
		961	mov [dma_process], eax
		962	mov eax, [TASK_BASE]
		963	mov [dma_slot_ptr], eax
3712	mario79	964	mov eax, [hd_address_table]
		965	cmp [hdbase], eax ; 0x1F0
2288	clevermous	966	jnz .ide1
3762	mario79	967
		968	mov [IDE_common_irq_param], irq14_num
2288	clevermous	969	jmp @f
		970	.ide1:
3762	mario79	971	mov [IDE_common_irq_param], irq15_num
2288	clevermous	972	@@:
3712	mario79	973	popfd
		974	mov eax, [hd_address_table]
		975	cmp [hdbase], eax ; 0x1F0
2288	clevermous	976	jnz .wait_ide1
		977	call wait_for_sector_dma_ide0
		978	jmp @f
		979	.wait_ide1:
		980	call wait_for_sector_dma_ide1
		981	@@:
		982	cmp [hd_error], 0
		983	jnz hd_read_error
		984	mov eax, [hdpos]
		985	mov [dma_hdpos], eax
		986	pop edx
		987	pop eax
		988	mov [dma_cur_sector], eax
		989	jmp hd_read_dma
3712	mario79	990	;-----------------------------------------------------------------------------
3742	clevermous	991	cache_write_dma:
2288	clevermous	992	mov eax, [cache_chain_ptr]
		993	push esi
		994	mov eax, IDE_descriptor_table
		995	mov edx, eax
		996	pusha
		997	mov edi, (OS_BASE+IDE_DMA)
		998	mov dword [edx], IDE_DMA
		999	movzx ecx, [cache_chain_size]
		1000	shl ecx, 9
		1001	mov word [edx+4], cx
		1002	shr ecx, 2
		1003	cld
		1004	rep movsd
		1005	popa
		1006	sub eax, OS_BASE
		1007	mov dx, [IDEContrRegsBaseAddr]
		1008	cmp [hdbase], 0x1F0
		1009	jz @f
		1010	add edx, 8
		1011	@@:
		1012	push edx
		1013	add edx, 4
		1014	out dx, eax
		1015	pop edx
		1016	mov al, 0
		1017	out dx, al
		1018	add edx, 2
		1019	mov al, 6
		1020	out dx, al
3712	mario79	1021
		1022	; Select the desired drive
		1023	mov edx, [hdbase]
		1024	add edx, 6 ; адрес регистра головок
		1025	mov al, byte [hdid]
		1026	add al, 128+64+32
		1027	out dx, al ; номер головки/номер диска
		1028
2288	clevermous	1029	call wait_for_hd_idle
		1030	cmp [hd_error], 0
		1031	jnz hd_write_error_dma
3712	mario79	1032
		1033	; ATA with 28 or 48 bit for sector number?
		1034	mov esi, [cache_chain_ptr]
		1035	mov eax, [esi]
		1036	; -40h because the PreCache hits the boundary between lba28 and lba48
		1037	; 40h = 64 - the maximum number of sectors to be written for one command
		1038	cmp eax, 0x10000000-40h
		1039	jae .lba48
		1040	;--------------------------------------
		1041	.lba28:
		1042	pushfd
		1043	cli
2288	clevermous	1044	xor eax, eax
		1045	mov edx, [hdbase]
		1046	inc edx
3712	mario79	1047	out dx, al ; ATA Features регистр "особенностей"
2288	clevermous	1048	inc edx
3712	mario79	1049	mov al, [cache_chain_size] ; Sector Counter
		1050	out dx, al ; ATA Sector Counter счётчик секторов
2288	clevermous	1051	inc edx
		1052	mov eax, [esi]
3712	mario79	1053	out dx, al ; LBA Low LBA (7:0)
2288	clevermous	1054	shr eax, 8
		1055	inc edx
3712	mario79	1056	out dx, al ; LBA Mid LBA (15:8)
2288	clevermous	1057	shr eax, 8
		1058	inc edx
3712	mario79	1059	out dx, al ; LBA High LBA (23:16)
2288	clevermous	1060	shr eax, 8
		1061	inc edx
3712	mario79	1062	and al, 0xF ; LBA (27:24)
2288	clevermous	1063	add al, byte [hdid]
		1064	add al, 11100000b
3712	mario79	1065	out dx, al ; номер головки/номер диска
2288	clevermous	1066	inc edx
3712	mario79	1067	mov al, 0xCA ; WRITE DMA
		1068	out dx, al ; ATACommand регистр команд
		1069	jmp .continue
		1070	;--------------------------------------
		1071	.lba48:
		1072	pushfd
		1073	cli
		1074	xor eax, eax
		1075	mov edx, [hdbase]
		1076	inc edx
		1077	out dx, al ; Features Previous Reserved
		1078	out dx, al ; Features Current Reserved
		1079	inc edx
		1080	out dx, al ; Sector Count Previous Sector count (15:8)
		1081	mov al, [cache_chain_size] ; Sector Counter
		1082	out dx, al ; Sector Count Current Sector count (7:0)
		1083	inc edx
		1084	mov eax, [esi]
		1085	rol eax, 8
		1086	out dx, al ; LBA Low Previous LBA (31:24)
		1087	xor eax, eax ; because only 32 bit cache
		1088	inc edx
		1089	out dx, al ; LBA Mid Previous LBA (39:32)
		1090	inc edx
		1091	out dx, al ; LBA High Previous LBA (47:40)
		1092	sub edx, 2
		1093	mov eax, [esi]
		1094	out dx, al ; LBA Low Current LBA (7:0)
		1095	shr eax, 8
		1096	inc edx
		1097	out dx, al ; LBA Mid Current LBA (15:8)
		1098	shr eax, 8
		1099	inc edx
		1100	out dx, al ; LBA High Current LBA (23:16)
		1101	inc edx
		1102	mov al, byte [hdid]
		1103	add al, 128+64+32
		1104	out dx, al ; номер головки/номер диска
		1105	inc edx
		1106	mov al, 35h ; WRITE DMA EXT
		1107	out dx, al ; ATACommand регистр команд
		1108	;--------------------------------------
		1109	.continue:
2288	clevermous	1110	mov dx, [IDEContrRegsBaseAddr]
3712	mario79	1111	mov eax, [hd_address_table]
		1112	cmp [hdbase], eax ; 0x1F0
2288	clevermous	1113	jz @f
		1114	add dx, 8
		1115	@@:
		1116	mov al, 1
		1117	out dx, al
		1118	mov eax, [CURRENT_TASK]
		1119	mov [dma_process], eax
		1120	mov eax, [TASK_BASE]
		1121	mov [dma_slot_ptr], eax
3712	mario79	1122	mov eax, [hd_address_table]
		1123	cmp [hdbase], eax ; 0x1F0
2288	clevermous	1124	jnz .ide1
3762	mario79	1125
		1126	mov [IDE_common_irq_param], irq14_num
2288	clevermous	1127	jmp @f
		1128	.ide1:
3762	mario79	1129	mov [IDE_common_irq_param], irq15_num
2288	clevermous	1130	@@:
3712	mario79	1131	popfd
2288	clevermous	1132	mov [dma_cur_sector], not 0x40
3712	mario79	1133	mov eax, [hd_address_table]
		1134	cmp [hdbase], eax ; 0x1F0
2288	clevermous	1135	jnz .wait_ide1
		1136	call wait_for_sector_dma_ide0
		1137	jmp @f
		1138	.wait_ide1:
		1139	call wait_for_sector_dma_ide1
		1140	@@:
		1141	cmp [hd_error], 0
		1142	jnz hd_write_error_dma
		1143	pop esi
		1144	ret
3712	mario79	1145	;-----------------------------------------------------------------------------
2288	clevermous	1146	uglobal
3762	mario79	1147	IDE_Interrupt dw ?
3712	mario79	1148	IDEContrRegsBaseAddr dw ?
		1149	IDEContrProgrammingInterface dw ?
3711	clevermous	1150	IDE_BAR0_val dw ?
		1151	IDE_BAR1_val dw ?
		1152	IDE_BAR2_val dw ?
		1153	IDE_BAR3_val dw ?
2288	clevermous	1154	endg
3712	mario79	1155	;-----------------------------------------------------------------------------
2288	clevermous	1156	; \begin{diamond}
		1157	uglobal
3712	mario79	1158	bios_hdpos dd 0 ; 0 is invalid value for [hdpos]
		1159	bios_cur_sector dd ?
		1160	bios_read_len dd ?
2288	clevermous	1161	endg
3712	mario79	1162	;-----------------------------------------------------------------------------
		1163	align 4
2288	clevermous	1164	bd_read:
		1165	push eax
		1166	push edx
		1167	mov edx, [bios_hdpos]
		1168	cmp edx, [hdpos]
		1169	jne .notread
		1170	mov edx, [bios_cur_sector]
		1171	cmp eax, edx
		1172	jb .notread
		1173	add edx, [bios_read_len]
		1174	dec edx
		1175	cmp eax, edx
		1176	ja .notread
		1177	sub eax, [bios_cur_sector]
		1178	shl eax, 9
		1179	add eax, (OS_BASE+0x9A000)
3742	clevermous	1180	push ecx esi
2288	clevermous	1181	mov esi, eax
		1182	mov ecx, 512/4
		1183	cld
		1184	rep movsd
3742	clevermous	1185	pop esi ecx
2288	clevermous	1186	pop edx
		1187	pop eax
		1188	ret
		1189	.notread:
		1190	push ecx
		1191	mov dl, 42h
		1192	mov ecx, 16
		1193	call int13_call
		1194	pop ecx
		1195	test eax, eax
		1196	jnz .v86err
		1197	test edx, edx
		1198	jz .readerr
		1199	mov [bios_read_len], edx
		1200	mov edx, [hdpos]
		1201	mov [bios_hdpos], edx
		1202	pop edx
		1203	pop eax
		1204	mov [bios_cur_sector], eax
		1205	jmp bd_read
		1206	.readerr:
		1207	.v86err:
		1208	mov [hd_error], 1
		1209	jmp hd_read_error
3712	mario79	1210	;-----------------------------------------------------------------------------
		1211	align 4
2288	clevermous	1212	bd_write_cache_chain:
		1213	pusha
		1214	mov edi, OS_BASE + 0x9A000
		1215	movzx ecx, [cache_chain_size]
		1216	push ecx
		1217	shl ecx, 9-2
		1218	rep movsd
		1219	pop ecx
		1220	mov dl, 43h
		1221	mov eax, [cache_chain_ptr]
		1222	mov eax, [eax]
		1223	call int13_call
		1224	test eax, eax
		1225	jnz .v86err
		1226	cmp edx, ecx
		1227	jnz .writeerr
		1228	popa
		1229	ret
		1230	.v86err:
		1231	.writeerr:
		1232	popa
		1233	mov [hd_error], 1
		1234	jmp hd_write_error
3712	mario79	1235	;-----------------------------------------------------------------------------
2288	clevermous	1236	uglobal
3712	mario79	1237	int13_regs_in rb sizeof.v86_regs
		1238	int13_regs_out rb sizeof.v86_regs
2288	clevermous	1239	endg
3712	mario79	1240	;-----------------------------------------------------------------------------
		1241	align 4
2288	clevermous	1242	int13_call:
		1243	; Because this code uses fixed addresses,
		1244	; it can not be run simultaniously by many threads.
3742	clevermous	1245	; In current implementation it is protected by common mutex 'ide_status'
2288	clevermous	1246	mov word [OS_BASE + 510h], 10h ; packet length
		1247	mov word [OS_BASE + 512h], cx ; number of sectors
		1248	mov dword [OS_BASE + 514h], 9A000000h ; buffer 9A00:0000
		1249	mov dword [OS_BASE + 518h], eax
		1250	and dword [OS_BASE + 51Ch], 0
		1251	push ebx ecx esi edi
		1252	mov ebx, int13_regs_in
		1253	mov edi, ebx
2384	hidnplayr	1254	mov ecx, sizeof.v86_regs/4
2288	clevermous	1255	xor eax, eax
		1256	rep stosd
		1257	mov byte [ebx+v86_regs.eax+1], dl
		1258	mov eax, [hdpos]
		1259	lea eax, [BiosDisksData+(eax-80h)*4]
		1260	mov dl, [eax]
		1261	mov byte [ebx+v86_regs.edx], dl
		1262	movzx edx, byte [eax+1]
		1263	; mov dl, 5
		1264	test edx, edx
		1265	jnz .hasirq
		1266	dec edx
		1267	jmp @f
		1268	.hasirq:
		1269	pushad
		1270	stdcall enable_irq, edx
		1271	popad
		1272	@@:
		1273	mov word [ebx+v86_regs.esi], 510h
		1274	mov word [ebx+v86_regs.ss], 9000h
		1275	mov word [ebx+v86_regs.esp], 0A000h
		1276	mov word [ebx+v86_regs.eip], 500h
		1277	mov [ebx+v86_regs.eflags], 20200h
		1278	mov esi, [sys_v86_machine]
		1279	mov ecx, 0x502
		1280	push fs
		1281	call v86_start
		1282	pop fs
		1283	and [bios_hdpos], 0
		1284	pop edi esi ecx ebx
		1285	movzx edx, byte [OS_BASE + 512h]
		1286	test byte [int13_regs_out+v86_regs.eflags], 1
		1287	jnz @f
		1288	mov edx, ecx
		1289	@@:
		1290	ret
		1291	; \end{diamond}

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(root)/kernel/trunk/blkdev/hd_drv.inc @ 4720 – Rev 3762