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 Dave Nutting Associates / Midway, Released in 1980
ROM Version: Extra Bases
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Dip Switch:JU
12345678FunctionOption
 Off      CabinetCocktail
 On      Upright*
   Off    MonitorB/W
   On    Color*
Dip Switch:S1
12345678FunctionOption
On       2 Players Game1 Credit*
Off       2 Credits
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