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Document Title: [Galaga Tech.html (html file)]

Galaga Pinouts and Configuration

Galaga

Turns out there are many different configurations and bootlegs of this game. So they're all presented below.

Galaga Pinouts

GALAGA PARTS SIDE SOLDER SIDE GND A 1 GND SPKR B 2 SPKR C 3 CTR D 4 +12V E 5 +12V +5V F 6 +5V GND H 7 GND CREDIT SW J 8 TEST SWITCH 1 COIN SW K 9 1P START L 10 2P START PL1 FIRE M 11 PL2 FIRE MOVE LEFT N 12 PL2 LEFT P 13 MOVE RIGHT R 14 PL2 RIGHT S 15 T 16 U 17 V 18 W 19 X 20 Y 21 GND Z 22 GND On the CPU board 1 - +12v 2 - GND 3 - +5v On the Video board 1 - RED 2 - GRN 3 - BLU 4 - SYNC 5 - VIDEO GND 6 - (Not used)

Galaga pinouts (also works on Mappy)

Submitted by z_morganrw@ccsvax.sfasu.edu




                               GALAGA/MAPPY

                        PARTS SIDE  |  SOLDER SIDE
------------------------------------|--------------------------------------
                      LOGIC GND | A | 1 | LOGIC GND
--------------------------------|---|---|----------------------------------
                           SPKR | B | 2 | SPKR (Not sure of polarity)
--------------------------------|---|---|----------------------------------
                            --- | C | 3 | COIN METER
--------------------------------|---|---|----------------------------------
                            --- | D | 4 | ---
--------------------------------|---|---|----------------------------------
                                | E | 5 |
--------------------------------|---|---|----------------------------------
                            +5v | F | 6 | +5v
--------------------------------|---|---|----------------------------------
                      LOGIC GND | H | 7 | LOGIC GND
--------------------------------|---|---|----------------------------------
                      CREDIT SW | J | 8 | TEST SWITCH (Tilt connected to this)
--------------------------------|---|---|----------------------------------
 (2nd coin mech also) 1 COIN SW | K | 9 |
--------------------------------|---|---|----------------------------------
                       1P START | L | 10| 2P START
--------------------------------|---|---|----------------------------------
  (To rapid fire brd #7)   FIRE | M | 11|
--------------------------------|---|---|----------------------------------
                      MOVE LEFT | N | 12|
--------------------------------|---|---|----------------------------------
                                | P | 13|
--------------------------------|---|---|----------------------------------
                     MOVE RIGHT | R | 14|
--------------------------------|---|---|----------------------------------
                                | S | 15|
--------------------------------|---|---|----------------------------------
                            --- | T | 16| ---
--------------------------------|---|---|----------------------------------
                            --- | U | 17| ---
--------------------------------|---|---|----------------------------------
                            --- | V | 18| ---
--------------------------------|---|---|----------------------------------
                            --- | W | 19| ---
--------------------------------|---|---|----------------------------------
                                | X | 20|
--------------------------------|---|---|----------------------------------
                                | Y | 21|
--------------------------------|---|---|----------------------------------
                      LOGIC GND | Z | 22| LOGIC GND
---------------------------------------------------------------------------


On the CPU board there is an additional 3-part connector.  This is power.
It's wired as follows:

            1 - +12v
            2 - GND
            3 - +5v

On the Video board, there is an additional 6-part connector.  This is
the video connector.  It's wired as follows:

            1 - RED
            2 - BLU
            3 - GRN
            4 - SYNC
            5 - VIDEO GND
            6 - (Not used)

Galaga also has the option of a Rapid Fire board.  This is a small board
that allows the fire button to be held down and your ship to continuously
fire shots at the enemy.  Holding this board with the circuits facing you 
and the connectors on the bottom, the pins are numbered 1-9 (with #3 missing).
The top set of connectors (J-1) is used for rapid fire, the bottom set (J-2)
is used for single fire.  It's wired as follows:

            1 - (Not used)
            2 - (Not used)
            3 - (Not present)
            4 - (Not used)
            5 - FIRE BUTTON (GND)
            6 - LOGIC GND
            7 - FIRE (From Galaga CPU board)
            8 - FIRE BUTTON
            9 - +5v

Galaga pinouts and dipswitch settings (36 pin bootleg)

Submitted by Chris Griffin (tasmo@evansville.net)


We stumbled across yet another ancient bootleg of Galaga with 36 pins.
We checked on the Internet and on Wiretap, and found nothing on a 36 pin
version, so we sat down and decided to figure out exactly what the pinouts
and dipswitch settings were.  Here they are, I hope other people will find
a use for these pinouts on the rare 36 pin version.

Parts                      Solder
------                     -------
Sync                A|1
Green Video Signal  B|2
Blue Video Signal   C|3
1P Left             D|4   Red Video Signal
1P Right            E|5   +12V
1P Start            F|6   2P Start
Coin 1              H|7
                    J|8   +5V
                    K|9   +5V
                    L|10
                    M|11
                    N|12  Test Switch
                    P|13
                    R|14
Audio -             S|15  Audio +
GND                 T|16
                    U|17
                    V|18

NOTE:  There are obviously a few things missing here.  If you find the
       Cocktail table pin let me know.  There is probably a 2P Joystick
       also, but in the Upright mode, you just take turns with the same
       joystick, so I am unsure of what it would be.

DIP SWITCH SETTINGS
--------------------
(BANK A)
1    2    3    4    5    6    7    8        FUNCTION:
------------------------------------------------------
On   On   On                                Free Play
Off  Off  Off                               1 Coin/1 Credit
Off  Off  On                                1 Coin/2 Credits
Off  On   Off                               1 Coin/3 Credits
On   Off  Off                               2 Coins/1 Credit
Off  On   On                                2 Coins/3 Credits
On   Off  On                                3 Coins/1 Credit
On   On   Off                               4 Coins/1 Credit
               DIPSWITCHES 4-8 CONTROL
               BONUSES, SORRY BUT I DIDN'T
               TAKE THE TIME TO FIGURE
               THEM OUT.  IF YOU'D LIKE TO,
               PLEASE E-MAIL THEM TO ME.

(BANK B)
1    2    3    4    5    6    7    8        FUNCTION:
------------------------------------------------------
Off  Off                                    Rank A
On   On                                     Rank B
Off  On                                     Rank C
On   Off                                    Rank D
          ?                                 Not Sure Yet
               On                           Sound in Attract Mode
               Off                          NO Sound in Attract Mode
                    On                      Halts Game (YES! A PAUSE!)
                    Off                     UNPAUSED
                         ?    ?    ?        Not Sure Yet

We hope this will help other people who have maybe found another one like
this.  Like I said, we have never seen or heard of one like it until now...
If you'd like to fill in some blanks that we left, feel free to E-Mail us.

Galaga pirated blue board error messages

Submitted by Unknown

All RAMs are 2114.

Video Board
===========
6F      RAM 2L
        G
6H      RAM 2H
        G
6J      RAM 4L
        G
6K      RAM 4H
        G
6L      RAM 3L
        G
6M      RAM 3H
        G

Main board
==========
5D      the game displays "RAM OK" but you can't exit the setup page.

5C      the game displays "RAM OK", then reboot forever.

Galaga pinouts revisited

Submitted by Brian Murray (brian@demon.csd.unsw.edu.au)

There are apparently many different galaga implementations, this one happens to be mine. I don't know how I would identify my particular boards, but I'll give as much as I can. (They were from a tabletop if that matters). There are two boards, both with blue solder masks. The top one (slightly larger) is the CPU board, has the 4 processors and program EPROMS, and holds a small credit-card sized daughter board that plugs into a 28-pin DIP socket near the EPROMS. It also has 'DG-09-2' silk-screened in one corner near the main connector. The bottom board is the video board. It has a small 5 pin connector in one corner for the video output signal, wired as follows : 

(closest to corner of board) 1 - Red
                             2 - Blue
                             3 - Green
                             4 - Sync
                             5 - Video GND

Note in my game, this connector has had wires soldered straight to it
and these brought around and soldered to the main connector in the
positions shown below, and the monitor wired to this connector instead.

Main connector:

                        PARTS SIDE  |  SOLDER SIDE
------------------------------------|--------------------------------------
                            GND | A | 1 | GND
--------------------------------|---|---|----------------------------------
                            GND | B | 2 | GND
--------------------------------|---|---|----------------------------------
                            +5V | C | 3 | +5V
--------------------------------|---|---|----------------------------------
                            +5V | D | 4 | +5V
--------------------------------|---|---|----------------------------------
                                | E | 5 |
--------------------------------|---|---|----------------------------------
                                | F | 6 | tabletop (closed) or upright (open) SW
--------------------------------|---|---|----------------------------------
              Player 1 RIGHT SW | H | 7 | Player 2 RIGHT SW
--------------------------------|---|---|----------------------------------
               Player 1 LEFT SW | J | 8 | Player 2 LEFT SW
--------------------------------|---|---|----------------------------------
               Player 1 FIRE SW | K | 9 | Player 2 FIRE SW
--------------------------------|---|---|----------------------------------
              Player 1 START SW | L | 10| Player 2 START SW
--------------------------------|---|---|----------------------------------
                                | M | 11| Coin SW
--------------------------------|---|---|----------------------------------
                                | N | 12| Test/Setup Mode SW
--------------------------------|---|---|----------------------------------
          Video Red (see above) | P | 13|
--------------------------------|---|---|----------------------------------
        Video Green (see above) | R | 14|
--------------------------------|---|---|----------------------------------
         Video Blue (see above) | S | 15|
--------------------------------|---|---|----------------------------------
         Video Sync (see above) | T | 16|
--------------------------------|---|---|----------------------------------
                                | U | 17| Speaker (to GND)
--------------------------------|---|---|----------------------------------
                           +12V | V | 18| +12V
--------------------------------|---|---|----------------------------------
                            +5V | W | 19| +5V
--------------------------------|---|---|----------------------------------
                            +5V | X | 20| +5V
--------------------------------|---|---|----------------------------------
                            GND | Y | 21| GND
--------------------------------|---|---|----------------------------------
                            GND | Z | 22| GND
---------------------------------------------------------------------------

Power comes in on the above connector.