I have written a small patch that let's me use my Amiga CD32
  joypad connected to the parallel port. Thought I'd share it with you so
  you can add it to the list of supported joysticks (hopefully someone will
  find it useful).
  
  It needs the following wiring:
  
  CD32 pad   |   Parallel port
  ----------------------------
  1 (Up)     |    2 (D0)
  2 (Down)   |    3 (D1)
  3 (Left)   |    4 (D2)
  4 (Right)  |    5 (D3)
  5 (Fire3)  |   14 (AUTOFD)
  6 (Fire1)  |   17 (SELIN)
  7 (+5V)    |    1 (STROBE)
  8 (Gnd)    |   18 (Gnd)
  9 (Fire2)  |    7 (D5)