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Internet Message Format  |  1992-12-17  |  2.6 KB
  1. Xref: sparky comp.sys.ibm.pc.hardware:33540 comp.sys.ibm.pc.misc:15935
  2. Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!bcm!bcm.tmc.edu!szhang
  3. From: szhang@bcm.tmc.edu (Shide Zhang)
  4. Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
  5. Subject: More Help! Apple joystick-->PC game port
  6. Followup-To: poster
  7. Date: 17 Dec 1992 19:44:05 GMT
  8. Organization: Baylor College of Medicine, Houston, Tx
  9. Lines: 69
  10. Message-ID: <1gqla5INNad4@gazette.bcm.tmc.edu>
  11. NNTP-Posting-Host: bcm.tmc.edu
  12. Keywords: Was: HELP! Pc game port pin connections?
  13.  
  14. I posted a few days ago asking how to built a convertor to connect an
  15. Apple //e //c joystick to my PC's game port. With the help of some VERY
  16. NICE netters I'v figured out the pin layout of both sides and the
  17. wiring diagram of my Apple joystick (See the charts below). However, I
  18. have another problem:
  19.  
  20. on the PC game port, when the fire button is pressed, a 0 volt signal is given
  21. but the Apple joystick will give a 5 volt siganl.
  22.  
  23. Do I have to re-wire the Apple joystick? Before I operate on my joystick,
  24. I'd like to hear some suggestions. Any comments?
  25.  
  26. Chart 1: the PC game port requires the following wiring diagram on joystick:
  27.  
  28. Pin 1-7 are for joystick A and 9-14 for joystick B.
  29.  
  30.             +------------------------> 1,9 +5VDC
  31.             |
  32.             +------^^^^^^  0-100K
  33.             |        ^
  34.             |        |
  35.             |        +---------------> 3,11 X control
  36.             |
  37.             +------^^^^^^  0-100K
  38.                      ^
  39.                      |
  40.                      +---------------> 6,13 Y control
  41.            
  42.                    _I_
  43.              +-----o o---------------> 2,10 Fire button 1
  44.              |
  45.              |     _I_
  46.              +-----o o----------------> 7,14 Fire button 2
  47.              |
  48.              +-----------------------> 4,12 GND
  49.  
  50. Chart 2. The wiring diagram of Aplle //e //c Joystick
  51.  
  52.              +-----------------------> 2  5VDC
  53.              |
  54.              +------^^^^^^  0-140K
  55.              |        ^
  56.              |        |
  57.              |        +--------------> 5 X control
  58.              |
  59.              +------^^^^^^  0-140K
  60.              |        ^
  61.              |        |
  62.              |        +-------------> 8 Y control
  63.              |
  64.              |      _I_
  65.              +------o o-------------> 7 Fire button 1
  66.              |        |    270 Ohm
  67.              |        +--^^^^^^-----> 3 GND
  68.              |
  69.              |      _I_
  70.              +------o o-------------> 1 Fire button 2
  71.                       |    270 Ohm
  72.                       +---^^^^^^----> 3 GND
  73.  
  74.  
  75.  
  76.  
  77. Please e-mail me if you can help.
  78.  
  79. Thanks in advance!
  80.  
  81. szhang@bcm.tmc.edu
  82.  
  83.