46 lines
1.7 KiB
Plaintext
46 lines
1.7 KiB
Plaintext
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DIG DUG Typed in by : Rick Schieve
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This is Dig Dug made easy. No fooling around with all the extra +5
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VDC return lines and other baloney done with the audio/regulator
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board and Atari power supply. A standard +5/+12 VDC game supply
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will run this fine.
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A - ground 1 - ground
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B - +5 VDC 2 - +5 VDC
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C - 3 -
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D - 4 -
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E - 5 -
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F - 6 -
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H - 7 -
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J - 8 -
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K - 2P start 9 - credit
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L - 10 - 1P start
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M - 11 - pump
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N - 12 -
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P - left 13 -
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R - right 14 - down
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S - 15 - up
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T - 16 -
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U - 17 - video ground
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V - 18 -
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W - blue 19 - red
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X - 20 - green
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Y - 21 -
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Z - control ground 22 -
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The 36 VAC is used to derive an internal -29 VDC for the high score
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table so it is not required for the game to work.
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For audio amplification I used an LM380 2 watt audio amp chip
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available from places like Digi-Key for under $1 as follows.
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Pin C from Dig Dug board to one side of 10 K (volume) pot and the
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other side of the pot to ground. Center tap of pot to pin 2 (of
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LM380). Pins 7 & 3 ground. Pin 14 to +12 VDC and .1 uf from pin 14
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to ground (decoupling cap). Pin 8 (output) has 2.7 ohm in series
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with .1 uf to ground to prevent chip from oscillating. Positive end
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of 250 uF electrolytic to pin 8 also. Negative end of cap to
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speaker and other speaker connection to ground.
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