joystick-parport.txt

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  However, there is nothing for free. To allow more sticks to be used at
once, you need the sticks to be purely switch based (that is non-TTL), and
not to need power. Just a plain simple six switches inside. If your
joystick can do more (eg. turbofire) you'll need to disable it totally first
if you want to use gamecon.c.

  Also, the connection is a bit more complex. You'll need a bunch of diodes,
and one pullup resistor. First, you connect the Directions and the button
the same as for db9, however with the diodes inbetween.

	    Diodes
(pin 2) -----|<|----> Up
(pin 3) -----|<|----> Down
(pin 4) -----|<|----> Left
(pin 5) -----|<|----> Right
(pin 6) -----|<|----> Button 1

  For two button sticks you also connect the other button.

(pin 7) -----|<|----> Button 2

  And finally, you connect the Ground wire of the joystick, like done in
this little schematic to Power and Data on the parallel port, as described
for the NES / SNES pads in section 2.1 of this file - that is, one data pin
for each joystick. The power source is shared.

Data    ------------+-----> Ground
	  Resistor  |
Power   --[10kOhm]--+

  And that's all, here we go!

2.2.3 Multisystem joysticks using turbografx.c
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  The TurboGraFX interface, designed by

	Steffen Schwenke <[e-mail]>

  allows up to 7 Multisystem joysticks connected to the parallel port. In
Steffen's version, there is support for up to 5 buttons per joystick.  However,
since this doesn't work reliably on all parallel ports, the turbografx.c driver
supports only one button per joystick. For more information on how to build the
interface, see

	http://www2.burg-halle.de/~schwenke/parport.html

2.3 Sony Playstation
~~~~~~~~~~~~~~~~~~~~

  The PSX controller is supported by the gamecon.c. Pinout of the PSX
controller (compatible with DirectPadPro):

  +---------+---------+---------+
9 | o  o  o | o  o  o | o  o  o | 1               parallel
   \________|_________|________/                  port pins
    |  |      |  |  |   |
    |  |      |  |  |   +-------->  Clock    ---  (4)
    |  |      |  |  +------------>  Select   ---  (3)
    |  |      |  +--------------->  Power    ---  (5-9)
    |  |      +------------------>  Ground   ---  (18-25)
    |  +------------------------->  Command  ---  (2)
    +---------------------------->  Data     ---  (one of 10,11,12,13,15)

  The driver supports these controllers:

 * Standard PSX Pad
 * NegCon PSX Pad
 * Analog PSX Pad (red mode)
 * Analog PSX Pad (green mode)
 * PSX Rumble Pad

2.4 Sega
~~~~~~~~
  All the Sega controllers are more or less based on the standard 2-button
Multisystem joystick. However, since they don't use switches and use TTL
logic, the only driver usable with them is the db9.c driver.

2.4.1 Sega Master System
~~~~~~~~~~~~~~~~~~~~~~~~
  The SMS gamepads are almost exactly the same as normal 2-button
Multisystem joysticks. Set the driver to Multi2 mode, use the corresponding
parallel port pins, and the following schematic:

    +-----------> Power
    | +---------> Right
    | | +-------> Left
    | | | +-----> Down
    | | | | +---> Up
    | | | | |
  _____________
5 \ o o o o o / 1
   \ o o x o /
  9 `~~~~~~~' 6
     | |   |
     | |   +----> Button 1
     | +--------> Ground
     +----------> Button 2

2.4.2 Sega Genesis aka MegaDrive
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  The Sega Genesis (in Europe sold as Sega MegaDrive) pads are an extension
to the Sega Master System pads. They use more buttons (3+1, 5+1, 6+1).  Use
the following schematic:

    +-----------> Power
    | +---------> Right
    | | +-------> Left
    | | | +-----> Down
    | | | | +---> Up
    | | | | |
  _____________
5 \ o o o o o / 1
   \ o o o o /
  9 `~~~~~~~' 6
     | | | |
     | | | +----> Button 1
     | | +------> Select
     | +--------> Ground
     +----------> Button 2

  The Select pin goes to pin 14 on the parallel port.

(pin 14) -----> Select

  The rest is the same as for Multi2 joysticks using db9.c

2.4.3 Sega Saturn
~~~~~~~~~~~~~~~~~
  Sega Saturn has eight buttons, and to transfer that, without hacks like
Genesis 6 pads use, it needs one more select pin. Anyway, it is still
handled by the db9.c driver. Its pinout is very different from anything
else.  Use this schematic:

    +-----------> Select 1
    | +---------> Power
    | | +-------> Up
    | | | +-----> Down
    | | | | +---> Ground
    | | | | |
  _____________
5 \ o o o o o / 1
   \ o o o o /
  9 `~~~~~~~' 6
     | | | |
     | | | +----> Select 2
     | | +------> Right
     | +--------> Left
     +----------> Power

  Select 1 is pin 14 on the parallel port, Select 2 is pin 16 on the
parallel port.

(pin 14) -----> Select 1
(pin 16) -----> Select 2

  The other pins (Up, Down, Right, Left, Power, Ground) are the same as for
Multi joysticks using db9.c

3. The drivers
~~~~~~~~~~~~~~
  There are three drivers for the parallel port interfaces. Each, as
described above, allows to connect a different group of joysticks and pads.
Here are described their command lines:

3.1 gamecon.c
~~~~~~~~~~~~~
  Using gamecon.c you can connect up to five devices to one parallel port. It
uses the following kernel/module command line:

	gc=port,pad1,pad2,pad3,pad4,pad5

  Where 'port' the number of the parport interface (eg. 0 for parport0).

  And 'pad1' to 'pad5' are pad types connected to different data input pins
(10,11,12,13,15), as described in section 2.1 of this file.

  The types are:

	Type | Joystick/Pad
	--------------------
	  0  | None
	  1  | SNES pad
	  2  | NES pad
	  4  | Multisystem 1-button joystick
	  5  | Multisystem 2-button joystick
	  6  | N64 pad
	  7  | Sony PSX controller

  The exact type of the PSX controller type is autoprobed, so you must have
your controller plugged in before initializing.

  Should you want to use more than one of parallel ports at once, you can use
gc_2 and gc_3 as additional command line parameters for two more parallel
ports.

3.2 db9.c
~~~~~~~~~
  Apart from making an interface, there is nothing difficult on using the
db9.c driver. It uses the following kernel/module command line:

	db9=port,type

  Where 'port' is the number of the parport interface (eg. 0 for parport0).

  Caveat here: This driver only works on bidirectional parallel ports. If
your parallel port is recent enough, you should have no trouble with this.
Old parallel ports may not have this feature.

  'Type' is the type of joystick or pad attached:

	Type | Joystick/Pad
	--------------------
	  0  | None
	  1  | Multisystem 1-button joystick
	  2  | Multisystem 2-button joystick
	  3  | Genesis pad (3+1 buttons)
	  5  | Genesis pad (5+1 buttons)
	  6  | Genesis pad (6+2 buttons)
	  7  | Saturn pad (8 buttons)
	  8  | Multisystem 1-button joystick (v0.8.0.2 pin-out)
	  9  | Two Multisystem 1-button joysticks (v0.8.0.2 pin-out) 
	 10  | Amiga CD32 pad

  Should you want to use more than one of these joysticks/pads at once, you
can use db9_2 and db9_3 as additional command line parameters for two
more joysticks/pads.

3.3 turbografx.c
~~~~~~~~~~~~~~~~
  The turbografx.c driver uses a very simple kernel/module command line:

	tgfx=port,js1,js2,js3,js4,js5,js6,js7

  Where 'port' is the number of the parport interface (eg. 0 for parport0).

  'jsX' is the number of buttons the Multisystem joysticks connected to the
interface ports 1-7 have. For a standard multisystem joystick, this is 1.

  Should you want to use more than one of these interfaces at once, you can
use tgfx_2 and tgfx_3 as additional command line parameters for two more
interfaces.

3.4 PC parallel port pinout
~~~~~~~~~~~~~~~~~~~~~~~~~~~
		  .----------------------------------------.
   At the PC:     \ 13 12 11 10  9  8  7  6  5  4  3  2  1 /
                   \  25 24 23 22 21 20 19 18 17 16 15 14 /
                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	  Pin | Name    | Description
	~~~~~~|~~~~~~~~~|~~~~~~~~~~
	    1 | /STROBE | Strobe
	  2-9 | D0-D7   | Data Bit 0-7
	   10 | /ACK    | Acknowledge
	   11 | BUSY    | Busy
	   12 | PE      | Paper End
	   13 | SELIN   | Select In
	   14 | /AUTOFD | Autofeed
	   15 | /ERROR  | Error
	   16 | /INIT   | Initialize
	   17 | /SEL    | Select
	18-25 | GND     | Signal Ground

3.5 End
~~~~~~~
  That's all, folks! Have fun!