These Roms are from a bootleg (pirate) board.  It is *completely
different from the original Bally/Midway board.  It consists of 2
piggybacked boards and 1 edge connector for I/O.  There is a large board
and a somewhat smaller board.  The only identifying markings on it are a
sticker with the label "Made in Japan SP-14" and a hand-etched "SP88
7-21-83"; no company name, etc.  (surprise, surprise).  The filename
convention is "galaga" for the game name, "bl" for "BootLeg", ".1_" for
1st bootleg board (there are many) and then a hex number for the ROM
number (1-10 = 1-a).  The ROMs are all 2732's and have the following
locations:

ROM |Board|Which|
 #  | Loc.|Board|  filename
----+-----+-----+------------
  1 | 4B  | Big |galagabl.1_1
  2 | 4C  | Big |galagabl.1_2
  3 | 4D  | Big |galagabl.1_3
  4 | 4E  | Big |galagabl.1_4
  5 | 4J  | Big |galagabl.1_5
  6 | 5E  | Big |galagabl.1_6
  7 | 4K  | Big |galagabl.1_7
  8 | R5  |Small|galagabl.1_8
  9 | A7  |Small|galagabl.1_9
 10 | A6  |Small|galagabl.1_a
