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 Jaleco, Released in 1989
ROM Version: Jitsuryoku!! Pro Yakyuu (Japan)
Print
Dip Switch:DSW
12345678FunctionOption
        Coin B1 Coin/1 Credit*
        Coin A1 Coin/1 Credit*
        Coin B1 Coin/2 Credits
        Coin A1 Coin/2 Credits
        1 Coin/3 Credits
        Coin B1 Coin/3 Credits
        Coin A1 Coin/4 Credits
        Coin B1 Coin/4 Credits
        1 Coin/5 Credits
        Coin A1 Coin/5 Credits
        Coin B2 Coins/1 Credit
        Coin A2 Coins/1 Credit
        3 Coins/1 Credit
        Coin B3 Coins/1 Credit
        4 Coins/1 Credit
        Coin AFree Play
        Demo SoundsOff
        Off
        On*
        On*
Off       2 Player Innings per Credit2*
On       3
 On      Difficulty for Catching BallHard
 Off      Normal*
    OnOff  DifficultyHard
    OffOn  Harder
    OnOn  Hardest
    OffOff  Normal*
  OnOffOnOn  Franchise (Increase Batting Power)13
  OffOnOnOn  14
  OnOnOnOn  15
  OffOffOffOn  Br (Bw)
  OffOffOnOn  Bu
  OnOnOffOff  C
  OffOnOffOff  D
  OnOffOffOn  F
  OnOffOffOff  G
  OffOnOffOn  H
  OnOnOnOff  L
  OffOffOffOff  Normal*
  OnOnOffOn  O (M)
  OffOffOnOff  S
  OffOnOnOff  T
  OnOffOnOff  W (B)
      Off Scroll Is Based OnShadow of Baseball*
      On The Baseball Itself
       OffFlip ScreenOff*
       OnOn
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