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How to build a Language Switch for your NEO*GEO CD

by Spaceman Spiff, lca@spiff.gnu.ai.mit.edu

HTML'ized by Thomas Bätzler, <Thomas@Baetzler.de>

        ____.:__________,  ._______.
._____ |    ||         /  /         \  G
|     \|    ||    ____/  |:   | |  :|  E
|      \   :||        /  |    : :   |  O
|   :|      ||    ___/__ |    : :   |
|    |\_____||    :    /  \         /  C
|____|       |________/    `-------'   D

+--------------------------------------+
 HOW TO BUILD A LANGUAGE SWITCH 4 NEOCD
+---------------------------[SS!SWaT]--+

WHAT YOU WILL NEED

HOW TO DO IT

To take the cover off of your NeoCD unscrew the four screws on the bottom. Carefully lift the cover up and forward so it clears the joystick connectors. The CD-ROM drive is on the top part of the case connected by a long I/O cable. Be careful not to mess up the cable. The cable is long enough to allow the top part of the case to sit upside down next to the bottom. Once you have top off you will see a rectangular board, see Board Diagram. The rest of the unit is covered by a shield. The board is connected to the rest of the unit by a logic cable (B). Revove the cable from the board by carefully pulling up on it. Don't worry .. it won't hurt it. Now remove the all the screws on the board. (denoted by (x) on the diagram) Once you have the board out you are ready to do work on it. Look at Figure 1. SNK was nice enough to print the country codes on the board. Now look at Figure 2. If you have an American system JN1 will have a wire. If you have a European system then JN2 will have the wire. Using a soldering iron remove the jumper. If there are no jumpers on the board then the system is set to Japanese. You can leave it this way if you like. If you want to be able to switch modes connect a switch to either JP1 and JP2, depending on weather you want to have a JPN to USA or JPN to EUR switch. Now all you have to do is put the thing back together. Make sure the CD I/O cable doesn't get pinched as you put the top back on and that you have put the logic cable, which connects the board with the rest of the unit, in correctly. Now, if you have done it correcly you should get 'shibaraku omachi kudasai' instead of 'Please wait' when the unit comes up. Enjoy.

BOARD DIAGRAM

+---------------------------------------------------------------------------+
|x  +--------+           x S N K   Made in Japan        x                  x|
|   |   A    |           ==========     +-----+---                          |
|   |        |               B          |  C  |                             |
|   +--------+                          +-----+                             |
|                                                                        +-+|
|   o D                                                                  |H||
|     __E .----------.                                  .----------.     +-+|
|x   |__| |x   F    x|                                  |x    G   x|       x|
+---------|          |----------------------------------|          |--------+
          |__________|                                  |__________|

Key

(A) See Figure 1
(B) Login Cable
(C) Switch 1
(D) Land 1
(E) On/Off Switch
(F) Joystick Connector 1
(G) Joystick Connercor 2
(H) See Figure 2
(x) Screws

FIGURE 1

         Country Code

      | JN4 | JN3 | JN2 | JN1 |
------+-----+-----+-----+-----+
JAPAN |  X  |  X  |  X  |  X  |
------+-----+-----+-----+-----+
U.S.A |  X  |  X  |  X  |  O  |
------+-----+-----+-----+-----+
EUR   |  X  |  X  |  O  |  X  |
------+-----+-----+-----+-----+

FIGURE 2

  Japan:                   Europe:                  U.S.A:

  +----------+             +----------+             +----------+
3 | o      o |  JN4      3 | o      o |  JN4      3 | o      o |  JN4
  +----------+             +----------+             +----------+

   --||||||--   R11         --||||||--   R11         --||||||--   R11

  +----------+             +----------+             +----------+
2 | o      o |  JN3      2 | o      o |  JN3      2 | o      o |  JN3
  +----------+             +----------+             +----------+

   --||||||--   R10         --||||||--   R10         --||||||--   R10

  +----------+             +----------+             +----------+
1 | o      o |  JN2      1 | O------O |  JN2      1 | o      o |  JN2
  +----------+             +----------+             +----------+

   --||||||--   R 9         --||||||--   R 9         --||||||--   R 9

  +----------+             +----------+             +----------+
0 | o      o |  JN1      0 | o      o |  JN1      0 | O------O |  JN1
  +----------+             +----------+             +----------+

   --||||||--   R 8         --||||||--   R 8         --||||||--   R 8

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Thomas Bätzler, Thomas@Baetzler.de
$Id: neocd_switch.html 1.6 1996/01/11 23:50:18 thb Exp thb $