Here's list of connections for analog PC joystick to
C64/128 paddles connector.

DB9 female		|DB15 female
pin		signal	|pin		signal
----------------------------------------------------
 3		LEFT	| 2		JOY A FIRE-1
 4		RIGHT	| 7		JOY A FIRE-2
 5		POT-Y	| 6		JOY A POT-Y
 7		+5V	| 1,8,9,15	+5V*
 8		GND	| 4,5,12	GND*
 9		POT-X	| 3		JOY A POT-X
----------------------------------------------------
* for +5V and GND it doesn't matter to which of
  the listed pins you'll solder - all have the same
  meaning, feel comfortable
; however avoid pins 12 and 15
  as they have some other use in MIDI-capable cards

Maciej 'YTM/Alliance' Witkowiak
ytm@friko.onet.pl
11.06.1999