Hardware DIPs

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File:Mvs dip.jpg
Hard DIPs on MV1F MVS board.
File:Harddips.png
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 (done by software in a system ROM call)
  • Switch 7: Enable freeplay
  • Switch 6: Enable communication
  • Switches 4~5: Multiplayer link cab number (in binary: 1, 2, 3, 4)
  • Switch 3: Mahjong Controller
  • Switch 2: Number of coin chutes (1 or 2)
  • Switch 1: Test mode

There's no such switches on AES and CD systems ($300001 reads what ?).