Hardware DIPs



Physical switches on MVS boards used to configure various options like freeplay and multiplayer link. The switches states are readable through register.


 * Switch 8: Freeze (done by software, in a BIOS call)
 * Switch 7: Enable freeplay
 * Switch 6: Enable communication
 * Switches 4~5: Multiplayer link cab number setting
 * Switch 3: Mahjong Controller
 * Switch 2: Coin slots configuration
 * Switch 1: Test mode

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