Document Title: [ (text file)]

DIG DUG                                   Typed in by : Rick Schieve
					  
					  Cocktail info added by
					  Doug Graham 11/2/94
 	
This is Dig Dug made easy.  No fooling around with all the extra +5
VDC return lines and other baloney done with the audio/regulator
board and Atari power supply.  A standard +5/+12 VDC game supply
will run this fine.

A - ground                1 - ground
B - +5 VDC                2 - +5 VDC
C -                       3 -
D -                       4 -
E -                       5 - 
F - cocktail *            6 -
H -                       7 -
J -                       8 -
K - 2P start              9 - credit
L - 2P pump *             10 - 1P start
M - 2P left *             11 - 1P pump
N - 2P right *            12 - 2P down *
P - 1P left               13 - 2P up *
R - 1P right              14 - 1P down
S -                       15 - 1P up
T -                       16 -
U -                       17 - video ground
V -                       18 -
W - blue                  19 - red
X -                       20 - green
Y -                       21 -
Z - control ground        22 -

The 36 VAC is used to derive an internal -29 VDC for the high score
table so it is not required for the game to work.

For audio amplification I used an LM380 2 watt audio amp chip
available from places like Digi-Key for under $1 as follows.

Pin C from Dig Dug board to one side of 10 K (volume) pot and the
other side of the pot to ground.  Center tap of pot to pin 2 (of
LM380).  Pins 7 & 3 ground.  Pin 14 to +12 VDC and .1 uf from pin 14
to ground (decoupling cap).  Pin 8 (output) has 2.7 ohm in series
with .1 uf to ground to prevent chip from oscillating.  Positive end
of 250 uF electrolytic to pin 8 also.  Negative end of cap to
speaker and other speaker connection to ground.

* For cocktail cabinet, connect pin F to ground
  and wire the 2P pins as shown.