G A L A G A
                           =============
                          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