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The following are the Dip Switch settings based off of MAME 0.180 source code.
 
Use this information at your own risk!  The information was parsed from the MAME source code and could contain errors as to the state, order or descriptions of what the switches do.  If you find an error, please let me know on the Contact Us form and I will work on correcting the issue. 
 
 
 
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NBA Jam
Manufactured by Midway, Released in 1993
ROM Version: NBA Jam (rev 1.00 02/1/93)
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Dip Switch:DSW
12345678FunctionOption
        Coinage1*
        Coin Counters1 Counter, 1 count/coin
        1 Counter, 1 count/coin*
        1 Counter, Totalizing
        Coinage2
        Coin Counters2 Counters, 1 count/coin
        Coinage3
        4
        Coinage SourceCMOS*
        Dipswitch
        CoinageECA
        Free Play
        CountryFrench
        German
        CoinageUnused
        Unused
        CountryUnused
        USA*
Off       Test SwitchOff*
On       On
 On      Powerup TestOff*
 Off      On
  Off     UnusedOff*
  On     On
   Off    Off*
   On    On
    Off   Off*
    On   On
     Off  VideoShow*
     On  Skip
      On ValidatorInstalled
      Off Not Present*
       OnPlayers2
       Off4*
ROM Version: NBA Jam (rev 2.00 02/10/93)
Print
Dip Switch:DSW
12345678FunctionOption
        Coinage1*
        Coin Counters1 Counter, 1 count/coin*
        1 Counter, 1 count/coin
        1 Counter, Totalizing
        Coinage2
        Coin Counters2 Counters, 1 count/coin
        Coinage3
        4
        Coinage SourceCMOS*
        Dipswitch
        CoinageECA
        Free Play
        CountryFrench
        German
        CoinageUnused
        Unused
        CountryUnused
        USA*
Off       Test SwitchOff*
On       On
 On      Powerup TestOff*
 Off      On
  Off     UnusedOff*
  On     On
   Off    Off*
   On    On
    Off   Off*
    On   On
     Off  VideoShow*
     On  Skip
      On ValidatorInstalled
      Off Not Present*
       OnPlayers2
       Off4*
ROM Version: NBA Jam (rev 3.01 04/07/93)
Print
Dip Switch:DSW
12345678FunctionOption
        Coinage1*
        Coin Counters1 Counter, 1 count/coin
        1 Counter, 1 count/coin*
        1 Counter, Totalizing
        Coinage2
        Coin Counters2 Counters, 1 count/coin
        Coinage3
        4
        Coinage SourceCMOS*
        Dipswitch
        CoinageECA
        Free Play
        CountryFrench
        German
        Unused
        CoinageUnused
        Unused
        CountryUSA*
Off       Test SwitchOff*
On       On
 On      Powerup TestOff*
 Off      On
  Off     UnusedOff*
  On     On
   Off    Off*
   On    On
    Off   Off*
    On   On
     Off  VideoShow*
     On  Skip
      On ValidatorInstalled
      Off Not Present*
       OnPlayers2
       Off4*
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