NINJA SPIRIT
Manufacturer: Irem
Year: 1988
Genre: Scrolling Fighter
Orientation: Horizontal
Conversion Class: Jamma
From: John Robertson (jrr@flippers.com)
Dip Switch settings:
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Dips Switch Set #1

Switches #1 & #2 control the number of players

 1   2

OFF OFF = Normal (3 players?) [I cannot verify at present, no game
pcb.]
ON  OFF = (Normal - 1) players (2 players?)
OFF ON  = (Normal + 1) players (4 players?)
ON  ON  = (Normal + 2) players (5 players?)

Switch #3 controls the general game difficulty

OFF = Normal
ON  = Difficult

Switch #4 either is another difficulty setting or is unknown

Recommendation: leave OFF

Switches #5 & #6 control Coin Selector A settings

(There are two coin modes, mode A and mode B.
 In "A" Mode, coin switches A and B share a common setting.
 In "B" Mode, they can be set differently.)

(Dip Switch #3 of Dip Switch Set #2 Controls Coin Mode)

("B" mode)

 5   6

OFF OFF = 1 Coin  = 1 Credit
ON  OFF = 2 Coins = 1 Credit
OFF ON  = 3 Coins = 1 Credit
ON  ON  = 5 Coins = 1 Credit

Switches #7 & #8 control Coin Selector B settings

("B" Mode)

 7   8

OFF OFF = 1 Coin  = 2 credits
ON  OFF = 1 Coin  = 3 Credits
OFF ON  = 1 Coin  = 5 Credits
ON  ON  = 1 Coin  = 6 Credits

In "A" Mode, 

 5   6   7   8

OFF OFF OFF OFF = 1 coin  = 1 credit
ON  OFF OFF OFF = 2 coins = 1 credit
OFF ON  OFF OFF = 3 coins = 1 credit
ON  ON  OFF OFF = 4 coins = 1 credit
OFF OFF ON  OFF = 5 coins = 1 credit
ON  OFF ON  OFF = 6 coins = 1 credit
OFF ON  ON  OFF = 1 coin  = 2 credits
ON  ON  ON  OFF = 1 coin  = 3 credits
OFF OFF OFF ON  = 1 coin  = 4 credits
ON  OFF OFF ON  = 1 coin  = 5 credits
OFF ON  OFF ON  = 1 coin  = 6 credits
ON  ON  OFF ON  = 2 coins = 3 credits
OFF OFF ON  ON  = 3 coins = 2 credits
ON  OFF ON  ON  = 5 coins = 3 credits
OFF ON  ON  ON  = 8 coins = 3 credits
ON  ON  ON  ON  = FREE PLAY

Dip Switch Set #2

Switch #1 controls monitor inversion

OFF = Normal Picture
ON  = Invert Picture

Switch #2 controls cabinet type

OFF = CT mode
ON  = UR mode

Switch #3 Controls Coin Selector Mode

OFF = Mode "A" (Common coin switches)
ON  = Mode "B" (Separate coin switches)

Switch #4 Controls Demo Sound

OFF = Demo Sound Enabled
ON  = Demo Sound Disabled

Switch #5 Controls Game Continuation Allowance

OFF = Game Continue Allowed
ON  = Game Continue Disallowed

Switch #6 Controls Screen Pause

OFF = Game Operates Normally
ON  = Freezes the Game Display
      Push 2 Player Start Button to Pause
      Push 1 Player Start Button to Resume

Switch #7 Controls No-Death Mode (Player becomes invincible)

OFF = Normal
On  = No-Death Mode

Switch #8 either activates the test mode or has no function.

Recommedation: All switches OFF except Switch #2 of Dip Set #2 (for UR
mode)

There may be a few errors/omissions, but that is beyond my control
now.
I determined most of this by trial and error method about a decade
ago. 
The board has long since left my hands. However, I believe it to be 
accurate and should get you going.
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Again, thanks!
John :-#)#
<jrr@flippers.com>