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 Sphinx / AV Japan, Released in 1994
ROM Version: Mahjong 4P Simasyo (Japan)
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Dip Switch:DSWA
12345678FunctionOption
OffOffOff     DifficultyEasiest*
OnOffOff     Easy
OnOffOn     Hard
OnOnOn     Hardest
OnOnOff     Medium
OffOnOff     Medium Easy
OffOffOn     Medium Hard
OffOnOn     Very Hard
   Off    Game SoundsOff
   On    On*
    Off   Demo SoundsOff
    On   On*
     Off  Flip ScreenOff
     On  On*
      OffOffCoinage1 Coin/1 Credit*
      OnOff1 Coin/2 Credits
      OffOn1 Coin/3 Credits
      OnOn2 Coins/1 Credit
Dip Switch:DSWB
12345678FunctionOption
      Off Option TestOff*
      On On
       OffGraphic ROM TestOff*
       OnOn
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