Hardware DIPs

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 ?).