linux/Documentation/input/amijoy.txt
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   1Amiga 4-joystick parport extension
   2~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   3Parallel port pins:
   4
   5 (2) - Up1       (6) - Up2
   6 (3) - Down1     (7) - Down2
   7 (4) - Left1     (8) - Left2
   8 (5) - Right1    (9) - Right2
   9(13) - Fire1    (11) - Fire2
  10(18) - Gnd1     (18) - Gnd2
  11
  12Amiga digital joystick pinout
  13~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  14(1) - Up
  15(2) - Down
  16(3) - Left
  17(4) - Right
  18(5) - n/c
  19(6) - Fire button
  20(7) - +5V (50mA)
  21(8) - Gnd
  22(9) - Thumb button
  23
  24Amiga mouse pinout
  25~~~~~~~~~~~~~~~~~~
  26(1) - V-pulse
  27(2) - H-pulse
  28(3) - VQ-pulse
  29(4) - HQ-pulse
  30(5) - Middle button
  31(6) - Left button
  32(7) - +5V (50mA)
  33(8) - Gnd
  34(9) - Right button
  35
  36Amiga analog joystick pinout
  37~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  38(1) - Top button
  39(2) - Top2 button
  40(3) - Trigger button
  41(4) - Thumb button
  42(5) - Analog X
  43(6) - n/c
  44(7) - +5V (50mA)
  45(8) - Gnd
  46(9) - Analog Y
  47
  48Amiga lightpen pinout
  49~~~~~~~~~~~~~~~~~~~~~
  50(1) - n/c
  51(2) - n/c
  52(3) - n/c
  53(4) - n/c
  54(5) - Touch button
  55(6) - /Beamtrigger
  56(7) - +5V (50mA)
  57(8) - Gnd
  58(9) - Stylus button
  59
  60-------------------------------------------------------------------------------
  61
  62NAME     rev ADDR type chip   Description
  63JOY0DAT      00A   R   Denise Joystick-mouse 0 data (left vert, horiz)
  64JOY1DAT      00C   R   Denise Joystick-mouse 1 data (right vert,horiz)
  65
  66        These addresses each read a 16 bit register. These in turn
  67        are loaded from the MDAT serial stream and are clocked in on
  68        the rising edge of SCLK. MLD output is used to parallel load
  69        the external parallel-to-serial converter.This in turn is
  70        loaded with the 4 quadrature inputs from each of two game
  71        controller ports (8 total) plus 8 miscellaneous control bits
  72        which are new for LISA and can be read in upper 8 bits of
  73        LISAID.
  74        Register bits are as follows:
  75        Mouse counter usage (pins  1,3 =Yclock, pins 2,4 =Xclock)
  76
  77    BIT#  15  14  13  12  11  10  09  08     07  06  05  04  03  02  01  00
  78JOY0DAT   Y7  Y6  Y5  Y4  Y3  Y2  Y1  Y0     X7  X6  X5  X4  X3  X2  X1  X0
  79JOY1DAT   Y7  Y6  Y5  Y4  Y3  Y2  Y1  Y0     X7  X6  X5  X4  X3  X2  X1  X0
  80
  81        0=LEFT CONTROLLER PAIR, 1=RIGHT CONTROLLER PAIR.
  82        (4 counters total). The bit usage for both left and right
  83        addresses is shown below. Each 6 bit counter (Y7-Y2,X7-X2) is
  84        clocked by 2 of the signals input from the mouse serial
  85        stream. Starting with first bit received:
  86
  87         +-------------------+-----------------------------------------+
  88         | Serial | Bit Name | Description                             |
  89         +--------+----------+-----------------------------------------+
  90         |   0    | M0H      | JOY0DAT Horizontal Clock                |
  91         |   1    | M0HQ     | JOY0DAT Horizontal Clock (quadrature)   |
  92         |   2    | M0V      | JOY0DAT Vertical Clock                  |
  93         |   3    | M0VQ     | JOY0DAT Vertical Clock  (quadrature)    |
  94         |   4    | M1V      | JOY1DAT Horizontal Clock                |
  95         |   5    | M1VQ     | JOY1DAT Horizontal Clock (quadrature)   |
  96         |   6    | M1V      | JOY1DAT Vertical Clock                  |
  97         |   7    | M1VQ     | JOY1DAT Vertical Clock (quadrature)     |
  98         +--------+----------+-----------------------------------------+
  99
 100         Bits 1 and 0 of each counter (Y1-Y0,X1-X0) may be
 101         read to determine the state of the related input signal pair.
 102         This allows these pins to double as joystick switch inputs.
 103         Joystick switch closures can be deciphered as follows:
 104
 105         +------------+------+---------------------------------+
 106         | Directions | Pin# | Counter bits                    |
 107         +------------+------+---------------------------------+
 108         | Forward    |  1   | Y1 xor Y0 (BIT#09 xor BIT#08)   |
 109         | Left       |  3   | Y1                              |
 110         | Back       |  2   | X1 xor X0 (BIT#01 xor BIT#00)   |
 111         | Right      |  4   | X1                              |
 112         +------------+------+---------------------------------+
 113
 114-------------------------------------------------------------------------------
 115
 116NAME      rev ADDR type chip    Description
 117JOYTEST       036   W   Denise  Write to all 4  joystick-mouse counters at once.
 118
 119                  Mouse counter write test data:
 120     BIT#  15  14  13  12  11  10  09  08     07  06  05  04  03  02  01  00
 121  JOYxDAT  Y7  Y6  Y5  Y4  Y3  Y2  xx  xx     X7  X6  X5  X4  X3  X2  xx  xx
 122  JOYxDAT  Y7  Y6  Y5  Y4  Y3  Y2  xx  xx     X7  X6  X5  X4  X3  X2  xx  xx
 123
 124-------------------------------------------------------------------------------
 125
 126NAME    rev ADDR type chip   Description
 127POT0DAT  h  012   R   Paula  Pot counter data left pair (vert, horiz)
 128POT1DAT  h  014   R   Paula  Pot counter data right pair (vert,horiz)
 129
 130        These addresses each read a pair of 8 bit pot counters.
 131        (4 counters total). The bit assignment for both
 132        addresses is shown below. The counters are stopped by signals
 133        from 2 controller connectors (left-right) with 2 pins each.
 134
 135  BIT#  15  14  13  12  11  10  09  08     07  06  05  04  03  02  01  00
 136 RIGHT  Y7  Y6  Y5  Y4  Y3  Y2  Y1  Y0     X7  X6  X5  X4  X3  X2  X1  X0
 137  LEFT  Y7  Y6  Y5  Y4  Y3  Y2  Y1  Y0     X7  X6  X5  X4  X3  X2  X1  X0
 138
 139         +--------------------------+-------+
 140         | CONNECTORS               | PAULA |
 141         +-------+------+-----+-----+-------+
 142         | Loc.  | Dir. | Sym | pin | pin   |
 143         +-------+------+-----+-----+-------+
 144         | RIGHT | Y    | RX  | 9   | 33    |
 145         | RIGHT | X    | RX  | 5   | 32    |
 146         | LEFT  | Y    | LY  | 9   | 36    |
 147         | LEFT  | X    | LX  | 5   | 35    |
 148         +-------+------+-----+-----+-------+
 149
 150         With normal (NTSC or PAL) horiz. line rate, the pots will
 151         give a full scale (FF) reading with about 500kohms in one
 152         frame time. With proportionally faster horiz line times,
 153         the counters will count proportionally faster.
 154         This should be noted when doing variable beam displays.
 155
 156-------------------------------------------------------------------------------
 157
 158NAME   rev ADDR type chip   Description
 159POTGO      034   W   Paula  Pot port (4 bit) bi-direction and data, and pot counter start.
 160
 161-------------------------------------------------------------------------------
 162
 163NAME   rev ADDR type chip   Description
 164POTINP     016   R   Paula  Pot pin data read
 165
 166        This register controls a 4 bit bi-direction I/O port
 167        that shares the same 4 pins as the 4 pot counters above.
 168
 169         +-------+----------+---------------------------------------------+
 170         | BIT#  | FUNCTION | DESCRIPTION                                 |
 171         +-------+----------+---------------------------------------------+
 172         | 15    | OUTRY    | Output enable for Paula pin 33              |
 173         | 14    | DATRY    | I/O data Paula pin 33                       |
 174         | 13    | OUTRX    | Output enable for Paula pin 32              |
 175         | 12    | DATRX    | I/O data Paula pin 32                       |
 176         | 11    | OUTLY    | Out put enable for Paula pin 36             |
 177         | 10    | DATLY    | I/O data Paula pin 36                       |
 178         | 09    | OUTLX    | Output enable for Paula pin 35              |
 179         | 08    | DATLX    | I/O data  Paula pin 35                      |
 180         | 07-01 |   X      | Not used                                    |
 181         | 00    | START    | Start pots (dump capacitors,start counters) |
 182         +-------+----------+---------------------------------------------+
 183
 184-------------------------------------------------------------------------------
 185
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