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Document Title: [Galaga_boot22.txt (text file)]

                            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

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 | GND for Cocktail 
              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
                           +12V | V | 18| +12V
                            +5V | W | 19| +5V
                            +5V | X | 20| +5V
                            GND | Y | 21| GND
                            GND | Z | 22| GND

}