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sane-plustek_pp(5)	 SANE Scanner Access Now Easy	    sane-plustek_pp(5)

NAME
       sane-plustek_pp	- SANE backend for Plustek parallel port flatbed scan‐
       ners

DESCRIPTION
       The sane-plustek_pp library implements a SANE (Scanner Access Now Easy)
       backend	that  provides access to Plustek ASIC 9600[1/3] and P9800[1/3]
       based parallel port flatbed scanners.  The access  of  the  scanner  is
       either done directly by the backend or via kernel module, called pt_drv
       which can be created out of the plustek_pp backend code - see also sec‐
       tion BUILDING THE KERNEL MODULE for further information.

SUPPORTED DEVICES
       At present, the following scanners should work with this backend and/or
       the kernel module:

       PLUSTEK SCANNERS

       Parallelport Model:    ASIC: Properties:
       ---------------------- ----- ------------------------
       OpticPro PT12	      98003 600x1200 dpi 36bit 512Kb
       OpticPro P12	      98003 600x1200 dpi 36bit 512Kb
       OpticPro 9636T/12000T  98001 600x1200 dpi 36bit 512Kb
       OpticPro 12000P Turbo  98001 600x1200 dpi 36bit 512Kb
       OpticPro 9636P+/Turbo  98001 600x1200 dpi 36bit 512Kb
       OpticPro 9636P	      96003 600x1200 dpi 36bit 128Kb
       OpticPro 12000P/96000P 96003 600x1200 dpi 36bit 128Kb
       OpticPro 1236P	      96003 600x1200 dpi 30bit 128Kb
       OpticPro 9600P	      96003 600x1200 dpi 30bit 128Kb
       OpticPro 9630P/FBIV    96003 600x1200 dpi 30bit 128Kb
       OpticPro 9630PL (14")  96003 600x1200 dpi 30bit 128Kb
       OpticPro A3I	      96003  400x800 dpi 36bit 128Kb
       OpticPro 600P/6000P    96003  300x600 dpi 30bit	32Kb
       OpticPro 4831P	      96003  300x600 dpi 30bit	32Kb
       OpticPro 4830P/FBIII   96003  300x600 dpi 30bit	32Kb
       OpticPro 4800P/FBII    96001  300x600 dpi 24bit	32Kb

       PRIMAX SCANNERS

       There are some scanners sold by Primax, but they are  in	 fact  Plustek
       devices.	 These	scanners are also supported.  The following table will
       show the relationship:

       Model:			   Plustek Model:  Remarks:
       --------------------------- --------------  ------------
       Colorado 4800		   OpticPro 4800   not tested
       Compact 4800 Direct	   OpticPro 600	   mov=2
       Compact 4800 Direct 30bit   OpticPro 4830   mov=7
       Compact 9600 Direct 30bit   OpticPro 9630   works

       GENIUS SCANNERS

       The following devices are sold as Genius	 Scanners,  but	 are  in  fact
       Plustek devices.	 The table will show the relationship:

       Model:			   Remarks:
       --------------------------- ----------------------------
       Colorpage Vivid III V2	   Like P12 but has two buttons
				   and Wolfson DAC

       ARIES SCANNERS

       There's	one  scanner  sold  as Aries Scanner, but is in fact a Plustek
       device.	The following table will show the relationship:

       Model:			   Plustek Model:  Remarks:
       --------------------------- --------------  ------------
       Scan-It 4800		   OpticPro 600	   mov=2

       BrightScan SCANNERS

       There's one scanner sold as BrightScan OpticPro Scanner, this is also a
       rebadged	 Plustek  device.  The following table will show the relation‐
       ship:

       Model:			   Remarks:
       --------------------------- ----------------------------
       BrightScan OpticPro	   OpticPro P12

DEVICE NAMES
       This backend works in two modes, the so called  "direct-mode"  and  the
       "kernel-mode".  In direct-mode, the user-space backend is used, in ker‐
       nel-mode, you should have a kernel-module named	pt_drv	loaded.	  This
       backends default device is:

	      0x378

       This  "default  device"	will  be used, if no configuration file can be
       found. It is rather the base address  of	 the  parallel	port  on  i386
       machines.

       As  the	backend supports up to four devices, it is possible to specify
       them in the configuration file

	      /system/resources/sane-backends/1.0.18/etc/sane.d/plus‐
	      tek_pp.conf

       See this file for examples.

CONFIGURATION
       This  section  describes the backends' configuration file entries.  The
       file	 is	  located	at:	  /system/resources/sane-back‐
       ends/1.0.18/etc/sane.d/plustek_pp.conf

       For a proper setup, you will need at least two entries:
	      [direct]
	      device 0x378

       or
	      [kernel]
	      device /dev/pt_drv

       direct  tells  the  backend, that the following devicename (here 0x378)
       has to be interpreted as parallel port scanner device. In  fact	it  is
       the  address  to	 use,  alternatively  you can use /dev/parport0 if the
       backend has been compiled with libieee1284 support.  kernel should only
       be  used,  when	a  kernel-module  has  been  built  out of the backend
       sources. See below for more instructions about this.

       Further options:

       option warmup t
	      t specifies the warmup period in seconds

       option lampOff t
	      t is the time in seconds for switching off the lamps in  standby
	      mode

       option lOffonEnd b
	      b specifies the behaviour when closing the backend, 1 --> switch
	      lamps off, 0 --> do not change lamp status

       option mov m
	      m is the model override switch, which only works in direct mode.

	      m = 0  default: no override

	      m = 1  OpticPro  9630PL  override	 (works	 if  OP9630  has  been
		     detected) forces legal size (14")

	      m = 2  Primax  4800Direct	 override  (works  if  OP600  has been
		     detected) swaps red/green color

	      m = 3  OpticPro  9636  override  (works  if  OP9636   has	  been
		     detected)	disables  backends transparency/negative capa‐
		     bilities

	      m = 4  OpticPro  9636P  override	(works	if  OP9636  has	  been
		     detected)	disables  backends transparency/negative capa‐
		     bilities

	      m = 5  OpticPro  A3I  override  (works  if  OP12000   has	  been
		     detected) enables A3 scanning

	      m = 6  OpticPro	4800P	override  (works  if  OP600  has  been
		     detected) swaps red/green color

	      m = 7  Primax 4800Direct 30bit override  (works  if  OP4830  has
		     been detected)

       See the plustek_pp.conf file for examples.

BUILDING THE KERNEL MODULE
       As  mentioned  before, the plustek_pp backend code can also be compiled
       and installed as linux kernel module. To	 do  so,  you  will  need  the
       source-files  of	 this sane-backend installation.  Unpack this tar-ball
       and go to the directory:
       sane-backends/doc/plustek
       Within this directory, you should find a script called:
       MakeModule.sh
       Now if your Linux kernelsources are installed correctly, it  should  be
       possible	 to  build,  install and load the module pt_drv.  Please note,
       that the kernelsources need to be configured correctly.	Refer to  your
       distributions manual on how this is done. As root user, try
       ./MakeModule.sh
       the  script  will try and get all necessary information about your run‐
       ning kernel and will lead you through the whole installation process.
       Note: Installing and loading the can only be done as superuser.

KERNEL MODULE SETUP
       The configuration of the kernel module is done  by  providing  some  or
       more options found below to the kernel module at load time. This can be
       done by invoking insmod with the appropriate  parameters	 or  appending
       the options to the file /etc/modules.conf (kernel < 2.6.x) or /etc/mod‐
       probe.conf (kernel >= 2.6.x)

       The Options:
       lampoff=lll
	      The value lll tells  the	driver,	 after	how  many  seconds  to
	      switch-off  the  lamp(s). The default value is 180.  0 will dis‐
	      able this feature.
	      HINT: Do not use a  value	 that  is  too	small,	because	 often
	      switching on/off the lamps will reduce their lifetime.

       port=ppp
	      ppp  specifies  the port base address, where the scanner is con‐
	      nected to. The default value is 0x378, which  normaly  is	 stan‐
	      dard.

       warmup=www
	      www specifies the time in seconds, how long a lamp has to be on,
	      until the driver will start to scan. The default value is 30.

       lOffonEnd=e
	      e specifies the behaviour	 when  unloading  the  driver,	1  -->
	      switch lamps off, 0 --> do not change lamp status

       slowIO=s
	      s specifies which I/O functions the driver should use, 1 --> use
	      delayed functions, 0 --> use the non-delayed ones

       forceMode=fm
	      fm specifies port mode which should be used,  0  -->  autodetec‐
	      tion, 1 --> use SPP mode and 2 --> use EPP mode

       mov=m

	      m = 0  default: no override

	      m = 1  OpticPro  9630PL  override	 (works	 if  OP9630  has  been
		     detected) forces legal size (14")

	      m = 2  Primax 4800Direct	override  (works  if  OP600  has  been
		     detected) swaps red/green color

	      m = 3  OpticPro	9636   override	 (works	 if  OP9636  has  been
		     detected) disables backends  transparency/negative	 capa‐
		     bilities

	      m = 4  OpticPro	9636P  override	 (works	 if  OP9636  has  been
		     detected) disables backends  transparency/negative	 capa‐
		     bilities

	      m = 5  OpticPro	A3I   override	(works	if  OP12000  has  been
		     detected) enables A3 scanning

	      m = 6  OpticPro  4800P  override	(works	if  OP600   has	  been
		     detected) swaps red/green color

	      m = 7  Primax  4800Direct	 30bit	override  (works if OP4830 has
		     been detected)

       Sample entry for file /etc/modules.conf :
       alias char-major-40 pt_drv
       pre-install pt_drv modprobe -k parport
       options	pt_drv	lampoff=180  warmup=15	port=0x378  lOffonEnd=0	 mov=0
       slowIO=0 forceMode=0

       For  multidevice	 support, simply add values separated by commas to the
       different options
       options pt_drv port=0x378,0x278 mov=0,4 slowIO=0,1 forceMode=0,1

       Remember to call depmod after changing /etc/conf.modules.

PARALLEL PORT MODES
       The current driver works best, when the parallel port has been  set  to
       EPP-mode.  When detecting any other mode such as ECP or PS/2 the driver
       tries to set to a faster, supported mode. If this fails,	 it  will  use
       the  SPP mode, as this mode should work with all Linux supported paral‐
       lel ports. If in doubt, enter your BIOS and set it to any  mode	except
       ECP.

       Former Plustek scanner models (4830, 9630) supplied a ISA parallel port
       adapter card. This card is not supported by the driver.

       The ASIC 96001/3 based models have sometimes trouble with high  resolu‐
       tion  modes.  If	 you encounter sporadic corrupted images (parts dupli‐
       cated or shifted horizontally) kill all other applications before scan‐
       ning and (if sufficient memory available) disable swapping.

       See the plustek_pp.conf file for examples.

FILES
       /system/resources/sane-backends/1.0.18/etc/sane.d/plustek_pp.conf
	      The backend configuration file

       /system/resources/sane-backends/1.0.18/lib/sane/libsane-plustek_pp.a
	      The static library implementing this backend.

       /system/resources/sane-backends/1.0.18/lib/sane/libsane-plustek_pp.so
	      The shared library implementing this backend (present on systems
	      that support dynamic loading).

       /lib/modules/<Kernel-Version>/kernel/drivers/parport/pt_drv.o
	      The Linux kernelmodule for kernels < 2.6.x.

       /lib/modules/<Kernel-Version>/kernel/drivers/parport/pt_drv.ko
	      The Linux kernelmodule for kernels >= 2.6.x.

ENVIRONMENT
       SANE_CONFIG_DIR
	      This environment variable specifies the list of directories that
	      may contain the configuration file.  Under UNIX, the directories
	      are separated by a colon (`:'), under OS/2, they	are  separated
	      by a semi-colon (`;').  If this variable is not set, the config‐
	      uration file is searched in two default directories: first,  the
	      current	 working   directory   (".")   and   then   in	 /sys‐
	      tem/resources/sane-backends/1.0.18/etc/sane.d.  If the value  of
	      the environment variable ends with the directory separator char‐
	      acter, then the  default	directories  are  searched  after  the
	      explicitly   specified   directories.    For   example,  setting
	      SANE_CONFIG_DIR to "/tmp/config:" would  result  in  directories
	      "tmp/config",	".",	 and	 "/system/resources/sane-back‐
	      ends/1.0.18/etc/sane.d" being searched (in this order).

       SANE_DEBUG_PLUSTEK_PP
	      If the library was compiled with	debug  support	enabled,  this
	      environment  variable controls the debug level for this backend.
	      Higher debug levels increase the verbosity of the output.

	      Example: export SANE_DEBUG_PLUSTEK_PP=10

SEE ALSO
       sane(7),
       /system/resources/sane-backends/1.0.18/doc/sane-1.0.18/plustek/Plustek-
       PARPORT.changes
       http://www.gjaeger.de/scanner/plustek_pp/

CONTACT AND BUG-REPORTS
       Please send any information and bug-reports to:
       SANE Mailing List

       Additional info and hints can be obtained from our
       Mailing-List archive at:
       http://www.sane-project.org/mailing-lists.html

       or directly from the projects' homepage at:
       http://www.gjaeger.de/scanner/plustek_pp/

       To  obtain debug messages from the backend, please set the environment-
       variable SANE_DEBUG_PLUSTEK_PP before calling your favorite  scan-fron‐
       tend (i.e. xscanimage).
       i.e.: export SANE_DEBUG_PLUSTEK_PP=20 ; xscanimage

       The value controls the verbosity of the backend.

KNOWN BUGS & RESTRICTIONS
       * The Halftoning works, but the quality is poor

       *  Printers (especially HP models) will start to print during scanning.
       This in fact is a problem to other printers  too,  using	 bidirectional
       protocol (see www.plustek.com (TAIWAN) page for further details)

       *  The  driver does not support these manic scalings up to 16 times the
       physical resolution. The only scaling is done  on  resolutions  between
       the  physical  resolution  of the CCD-sensor and the stepper motor i.e.
       you have a 600x1200 dpi scanner and you are scanning using  800dpi,  so
       scaling	is  necessary, because the sensor only delivers 600dpi but the
       motor is capable to perform 800dpi steps.

       * On some devices, the pictures seems bluish

       ASIC 98001 based models:

       * The 300dpi transparency and negative mode does not work correctly.

       * There is currently no way to distinguish a  model  with  and  without
       transparency unit.

       * The scanned images seem to be too dark (P9636T)

       ASIC 96003/1 based models:

       * 30bit mode is currently not supported.

       *  On low end systems under heavy system load the driver may lose data,
       which can result in picture corruption or cause the sensor to  hit  the
       scan bed.

       * The scanning speed on 600x1200 dpi models is slow.

       * The scanning quality of the A3I is poor

sane-backends 1.0.18		 18 June 2004		    sane-plustek_pp(5)
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