Parts list:
Cut down 76 pin connector available at Radio Shack--trim to 64 pins
Male DB25 connector/Hood
14 conductor wire for cable
+5 V power supply

2x1 uF tantalum caps
1x.0015 uF capacitor

5x 74LS93
2x 74LS153

5x 14 pin sockets (wire wrap)
2x 16 pin sockets (wire wrap)

A board to make it on
NOTES:
SA1-SA32 are Genesis pins A1-A32
SB1-SB32 are Genesis pins B1-B32
P1-P25 are Amiga parallel port pins 1-25


                                       +-----------------+
                                       | 1               |
      +--------------------------------+--------+        |
    5 |                                B        | 12     |
 >----+ Vcc                                   1 +--------+-------->A 1  SA17
   10 |                                         | 9
 >----+ Gnd          74LS93                   2 +----------------->A 2  SA15
   14 |                                         | 8
 >----+ A              3                      4 +----------------->A 3  SA13
CNT   |                                         | 11
      |                                       8 +------+---------->A 4  SA11
      |  R1   R2                                |      |
      +---+----+--------------------------------+      |
          | 2  | 3                                     |
  >-------+----+            +--------------------------+
CLR       |    |            |          +-----------------+
          | 2  | 3          | 14       | 1               |
      +---+----+------------+----------+--------+        |
    5 |  R1   R2            A          B        | 12     |
 >----+ Vcc                                   1 +--------+-------->A 5  SA9
   10 |                                         | 9
 >----+ Gnd          74LS93                   2 +----------------->A 6  SA7
      |                                         | 8
      |                4                      4 +----------------->A 7  SA5
      |                                         | 11
      |                                       8 +------+---------->A 8  SA3
      |  R1   R2                                |      |
      +---+----+--------------------------------+      |
          | 2  | 3                                     |
          |    |            +--------------------------+
          |    |            |          +-----------------+
          | 2  | 3          | 14       | 1               |
      +---+----+------------+----------+--------+        |
    5 |  R1   R2            A          B        | 12     |
 >----+ Vcc                                   1 +--------+-------->A 9  SB4
   10 |                                         | 9
 >----+ Gnd          74LS93                   2 +----------------->A10  SB5
      |                                         | 8
      |                5                      4 +----------------->A11  SA4
      |                                         | 11
      |                                       8 +------+---------->A12  SA6
      |  R1   R2                                |      |
      +---+----+--------------------------------+      |
          | 2  | 3                                     |
          |    |            +--------------------------+
          |    |            |          +-----------------+
          | 2  | 3          | 14       | 1               |
      +---+----+------------+----------+--------+        |
    5 |  R1   R2            A          B        | 12     |
 >----+ Vcc                                   1 +--------+-------->A13  SA8
   10 |                                         | 9
 >----+ Gnd          74LS93                   2 +----------------->A14  SA10
      |                                         | 8
      |                6                      4 +----------------->A15  SA12
      |                                         | 11
      |                                       8 +------+---------->A16  SA14
      |  R1   R2                                |      |
      +---+----+--------------------------------+      |
          | 2  | 3                                     |
          |    |            +--------------------------+
          |    |            |          +-----------------+
          | 2  | 3          | 14       | 1               |
      +---+----+------------+----------+--------+        |
    5 |  R1   R2            A          B        | 12     |
 >----+ Vcc                                   1 +--------+-------->A17  SA16
   10 |                                         | 9
 >----+ Gnd          74LS93                   2 +----------------->A18  SB6
      |                                         | 8
      |                7                      4 +----------------->A19  SB7
      |                                         | 11
      |                                       8 +----------------->A20  SB8
      |                                         |      
      +-----------------------------------------+      



          +-------------------------------------+
    >-16--+ Vcc                             1C0 +---6-------------> D0  SA20
          |                                 1C1 +---5-------------> D4  SA28
    >--8+-+ Gnd                             1C2 +---4-------------> D8  SA21
        | |                                 1C3 +---3-------------> D12 SB25
      1 +-+ Strobe 1G                           |
     15 +-+ Strobe 2G    LS153                  |
SEL0      |                                     |
   >--15--+  A            1                 2C0 +---10------------> D1  SA23
SEL1      |                                 2C1 +---11------------> D5  SA25
   >--2---+  B                              2C2 +---12------------> D9  SA24
          |                                 2C3 +---13------------> D13 SB24
          +--+-------+--------------------------+
AD0>---------+ 7     + 9
AD1>-----------------+

          +-------------------------------------+
    >-16--+ Vcc                             1C0 +---6-------------> D2  SA26
          |                                 1C1 +---5-------------> D6  SA22
    >--8+-+ Gnd                             1C2 +---4-------------> D10 SA27
        | |                                 1C3 +---3-------------> D14 SB23
      1 +-+ Strobe 1G                           |
     15 +-+ Strobe 2G    LS153                  |
SEL0      |                                     |
   >--15--+  A            2                 2C0 +---10------------> D3  SA29
SEL1      |                                 2C1 +---11------------> D7  SA19
   >--2---+  B                              2C2 +---12------------> D11 SA30
          |                                 2C3 +---13------------> D15 SB22
          +--+-------+--------------------------+
AD2>---------+ 7     + 9
AD3>-----------------+

GND>----------------------------------------> SA1, SA32, SB16, SB17

+5 >----------------------------------------> SA2, SA32

P2  >-----> CNT >--------------+--->
P3  >-----> CLR >-----+-->     |
P4  >-----> SEL0-->   |       ---
P5  >-----> SEL1-->   |       --- .0015
P6  >-----> AD0-->   ---       |   uF
P7  >-----> AD1-->   --- 1     |
P8  >-----> AD2-->    |  uF    |
P9  >-----> AD3-->    |        |
P18 >-----> GND >-----+--------+---->
                     ---
                     --- 1uF
                      |
+5 >------------------+------------->
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