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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06118 DIP/Input Minor Always Jan 2, 2016, 04:02 25 days ago
Tester ketburai View Status Public Platform MAME (Official Binary)
Assigned To smf Resolution Fixed OS
Status [?] Resolved Driver
Version 0.169 Fixed in Version 0.180 Build
Fixed in Git Commit Github Pull Request #
Summary 06118: taitofx1, vspsx: "Unknown" dipswitches 3 and 4 on PlayStation-based arcade hardware
Description Seems these do different things for each brand. So far I see:

-Taito: Not sure what dip 3 does yet, but dip 4 brings the game's test menu up on boot.
-Video System: Dip 3 brings up the game's test menu on boot, dip 4 purges nvram completely and prevents further saving (the test menu notes status of this at the bottom).

I imagine every brand uses one of them for game test menus.

edit: Sorry about that, for some reason I completely missed the DIP/Input category.
Steps To Reproduce
Additional Information
Github Commit
Flags Noted in Source
Regression Version
Affected Sets / Systems taitofx1, vspsx
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Jan 4, 2016, 08:25
Thanks for the report! At line 2692 of drivers/zn.c there's a note about this: PORT_DIPUNKNOWN_DIPLOC( 0x08, 0x08, "S551:4" ) // game testmode in some games
So it probably should be researched for every game and eventually correctly identified/differentiated in the source.