SATAN'S HOLLOW  PINOUT

     CPU BOARD                      SOUND BOARD
------------------------------------------------------------------------------
J1                 J2                J4             J5        J3
--                 --                --             --        --
 1                 1  VID RED         1  COIN 1     19  KEY   1  1K POT
 2  +5V            2  GND             2  COIN 2     20  GND   2  WIPER
 3  +5V            3  VID GN          3  1 START    21  CTR   3  1K POT
 4  +5V            4  GND             4  2 START              4  KEY
 5  +5V            5  VID BL          5                       5
 6  GND            6  GND             6  TILT                 6  R SHIELD
 7  GND            7  KEY             7  SVC                  7  R AUDIO 
 8  GND SENSE      8  H SYNC          8  TEST                 8  L SHIELD
 9  +5V SENSE      9  V SYNC          9  GND                  9  L AUDIO 
10  GND                              10  1 LEFT
11  +5V UNREG                        11  1 RIGHT        PWR AMP BOARD
12  -5V                              12  1 SHIELD   -----------------------
13  FAIL                             13  1 FIRE      J1          J2
14  GND                              14  KEY         --          --
15  KEY                              15  2 LEFT      1           1  R SPKR
16  V. BATT                          16  2 RIGHT     2  L AUDIO  2  R SPKR
17  RESET LOW                        17  2 SHIELD    3  SHIELD   3  KEY
18  +12V                             18  2 FIRE      4  KEY      4  L SPKR
19  EARTH GND                        19  GND         5  GND      5
20  ANALOG GND                                       6  R AUDIO  6  L SPKR
                                                     7     
                                                     8  +12V
  POSITION B3 - SOUND BOARD