Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08095 DIP/Input Minor Always Oct 2, 2021, 12:20 Oct 3, 2021, 23:20
Tester Wulfaz View Status Public Platform MAME (Official Binary)
Assigned To Wulfaz Resolution Fixed OS Windows 10 (64-bit)
Status [?] Resolved Driver
Version 0.236 Fixed in Version 0.237 Build 64-bit
Fixed in Git Commit d9f1bb5 Github Pull Request #
Summary 08095: gunchamp: "Unknown" dip switch role found
Description In the Gun Champ arcade game by Model Racing, I have figured out what the "Unknown" dip switch does. It decides whether you write your name (set it to OFF) after a high score or not (set it to ON).
Steps To Reproduce 1. Beat the high score (extremely difficult in my opinion. I couldn't beat it) and see the difference with the switch on or off.


1. Open Mame Debug mode.
2. Click the Debug bar and New Memory window
3. Monitor the section "memory/:maincpu/0/:main_ram" (it is between global and stream sections)
4. Run and play. During play, on the first line, change the 6th bit starting from the right to 8 or 9 to get higher score than the original hi-score. Shoot something during gameplay for the score to record just in case.
5. Do Steps 1-4 with the unknown dip switch on or off.
Additional Information
Github Commit
Regression Version
Affected Sets / Systems gunchamp
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