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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Manufactured by Nintendo Co., Ltd., Released in 1984
ROM Version: Vs. BaseBall (Japan, set BA A-1)
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Dip Switch:SW1
12345678FunctionOption
OnOff      Player Defense StrengthMedium
OffOn      Normal*
OnOn      Strong
OffOff      Weak
  OnOff    Player Offense StrengthMedium
  OffOn    Normal*
  OnOn    Strong
  OffOff    Weak
    OnOff  Computer Defense StrengthMedium
    OffOn  Normal*
    OnOn  Strong
    OffOff  Weak
      OnOffComputer Offense StrengthMedium
      OffOnNormal*
      OnOnStrong
      OffOffWeak
Dip Switch:SW2
12345678FunctionOption
 OffOff     Coinage1 Coin/1 Credit*
 OffOn     1 Coin/2 Credits
 OnOff     2 Coins/1 Credit
 OnOn     Free Play
   OffOffOn  Starting Points100 Pts
   OffOnOff  150 Pts
   OffOnOn  200 Pts
   OnOffOff  250 Pts
   OnOffOn  300 Pts
   OnOnOff  350 Pts
   OnOnOn  400 Pts
   OffOffOff  80 Pts*
      On Bonus PlayOff
      Off On*
       OffDemo SoundsOff
       OnOn*
ROM Version: Vs. BaseBall (Japan, set BA A-2)
Print
Dip Switch:SW1
12345678FunctionOption
OnOff      Player Defense StrengthMedium
OffOn      Normal*
OnOn      Strong
OffOff      Weak
  OnOff    Player Offense StrengthMedium
  OffOn    Normal*
  OnOn    Strong
  OffOff    Weak
    OnOff  Computer Defense StrengthMedium
    OffOn  Normal*
    OnOn  Strong
    OffOff  Weak
      OnOffComputer Offense StrengthMedium
      OffOnNormal*
      OnOnStrong
      OffOffWeak
Dip Switch:SW2
12345678FunctionOption
 OffOff     Coinage1 Coin/1 Credit*
 OffOn     1 Coin/2 Credits
 OnOff     2 Coins/1 Credit
 OnOn     Free Play
   OffOffOn  Starting Points100 Pts
   OffOnOff  150 Pts
   OffOnOn  200 Pts
   OnOffOff  250 Pts
   OnOffOn  300 Pts
   OnOnOff  350 Pts
   OnOnOn  400 Pts
   OffOffOff  80 Pts*
      On Bonus PlayOff
      Off On*
       OffDemo SoundsOff
       OnOn*
ROM Version: Vs. BaseBall (Japan, set BA A-3)
Print
Dip Switch:SW1
12345678FunctionOption
OnOff      Player Defense StrengthMedium
OffOn      Normal*
OnOn      Strong
OffOff      Weak
  OnOff    Player Offense StrengthMedium
  OffOn    Normal*
  OnOn    Strong
  OffOff    Weak
    OnOff  Computer Defense StrengthMedium
    OffOn  Normal*
    OnOn  Strong
    OffOff  Weak
      OnOffComputer Offense StrengthMedium
      OffOnNormal*
      OnOnStrong
      OffOffWeak
Dip Switch:SW2
12345678FunctionOption
 OffOff     Coinage1 Coin/1 Credit*
 OffOn     1 Coin/2 Credits
 OnOff     2 Coins/1 Credit
 OnOn     Free Play
   OffOffOn  Starting Points100 Pts
   OffOnOff  150 Pts
   OffOnOn  200 Pts
   OnOffOff  250 Pts
   OnOffOn  300 Pts
   OnOnOff  350 Pts
   OnOnOn  400 Pts
   OffOffOff  80 Pts*
      On Bonus PlayOff
      Off On*
       OffDemo SoundsOff
       OnOn*
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