Vs. Battle City dip switch settings:
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Dip bank #1:

CREDITS FOR 2 PLAYERS: (dip 1)
 - 1                        OFF
 - 2*                      ON
LIVES: (dip 2)
 - 3*                           OFF
 - 5                           ON
DEMO SOUNDS: (dip 3)
 - Off                             ON
 - On*                              OFF
UNKNOWN: (dip 4)
 - Off*                                 OFF
 - On                                  ON
UNKNOWN: (dip 5)
 - Off*                                     OFF
 - On                                      ON
UNKNOWN: (dip 6)
 - Off*                                         OFF
 - On                                          ON
COLOR PALETTE: (dips 7-8)
 - Normal*                                          OFF ON
 - Wrong 1                                          OFF  OFF
 - Wrong 2                                         ON  OFF
 - Wrong 3                                         ON ON

* - default setting