Hardware DIPs

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Hard DIPs on MV1F MVS board.
DIP switches state viewer in the system ROM.

Physical DIP switches on MVS boards used to configure various options like coin-up and multiplayer link. The switches states are read through register REG_DIPSW as a byte (0 is on).

  • Switch 8: Freeze - pauses the game (done by software in a system ROM call)
  • Switch 7: Enable freeplay (player start doesn't require credits)
  • Switch 6: Enable communication
  • Switches 4~5: Multiplayer link cab number (in binary: 1, 2, 3, 4)
  • Switch 3: Enable mahjong controller
  • Switch 2: Number of coin chutes (1 or 2)
  • Switch 1: Bring up the system ROM menu at boot

There are no such switches on home and CD systems.