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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08135 DIP/Input Trivial N/A Nov 19, 2021, 06:44 Nov 26, 2021, 17:27
Tester GoldS_TCRF View Status Public Platform MAME (Official Binary)
Assigned To Steve Coomber Resolution Fixed OS Windows 10/11 (64-bit)
Status [?] Resolved Driver
Version 0.237 Fixed in Version 0.239 Build 64-bit
Fixed in Git Commit e369df8 Github Pull Request #
Summary 08135: qzquest: Dip switches 2-3 and 2-4 are used.
Description Dip switches 2-3 and 2-4 are used to adjust how much time it takes for one unit of the player's timer to deplete:
$00: 100 frames per unit
$01: 50 frames per unit
$02: 150 frames per unit
$03: 200 frames per unit

The table for this is at 0x1DE14 in the main ROM. This value is set when the game boots, so after changing the dip switches, the game needs to be reset for it to take effect. The RAM address for 1P's timer is 50DBF4, and 2P's timer is at 50DBF8.
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Additional Information
Github Commit
Regression Version
Affected Sets / Systems qzquest
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Steve Coomber
Nov 22, 2021, 15:16
Do you know if these DIP switches are documented somewhere? I wasn't able to locate an operators manual for this game title
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Nov 24, 2021, 21:30
edited on: Nov 24, 2021, 21:31
I'm not sure, I don't have a manual or any other kind of official documents for this game. I was able to verify the dip switches were used by looking through the game's code.
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Steve Coomber
Nov 25, 2021, 19:06
The DIP switches definitely behaves as you described and I would expect this would be a documented feature. I was thinking of calling the pair of DIP switches "Countdown Timer" with the following selection
1. Very Slow
2. Slow
3. Medium (default)
4. Fast
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Steve Coomber
Nov 25, 2021, 19:14
Do you know if the difficulty setting has any effect on the questions?
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Steve Coomber
Nov 25, 2021, 22:55
I have created a pull request for this issue:

If the change is acceptable and is merged, this issue can be marked resolved.
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Nov 26, 2021, 00:19
edited on: Nov 26, 2021, 00:19
The difficulty dip switches only have a single effect in the game. The game sometimes replaces one of the items in a shop or the item in the chest game with a Yes/No Slab, a 2-Choice Sword, or a 3-Choice Halberd: This is most likely on Easy and unlikely on Hardest. It has no effects on the questions asked or on the timer.
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Steve Coomber
Nov 26, 2021, 09:28
Thanks for the response. In the code we have a comment against the difficulty setting "??" suggesting that effect wasn't known at the time the game was added to MAME. What you advise does affect the difficulty by offering fewer or greater 'lifelines' (as it's called in Who Wants to be a Millionaire!). It might be worth updating the comment to clarify this effect.
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Steve Coomber
Nov 26, 2021, 09:30
The pull request has now been merged so this issue can be marked resolved. Thank you