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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08404 DIP/Input Minor Always Aug 24, 2022, 09:48 Aug 25, 2022, 20:29
Tester tepidsnake View Status Public Platform MAME (Official Binary)
Assigned To Steve Coomber Resolution Fixed OS Windows 10/11 (64-bit)
Status [?] Resolved Driver
Version 0.246 Fixed in Version 0.247 Build 64-bit
Fixed in Git Commit c73af1d Github Pull Request # #10247
Summary 08404: wndrmomo: Eight-way input not supported
Description Wonder Momo is listed as a 4-way joystick game and currently behaves as such in MAME- you cannot turn while crouching as trying to do so makes Momo stand up and turn, which makes sense for a joystick setup like thiu. However, the attract mode briefly shows the computer-controlled player crouching then turning without standing up (slowed-down GIF attached to demonstrate this- just before the demo player fires the Wonder Hoop they crouch facing the screen, then turn while still crouched). The recent Arcade Archives rerelease also has this behaviour and lets the player turn and crouch. It seems this was the intended behaviour but doesn't work correctly in MAME as of right now.
Steps To Reproduce In-game, hold Down to crouch then try and press Left or Right to turn, you will instead stand up and then turn. In the gane's demo and other emulated versions, you can turn while crouching which seems to be the intended behaviour.
Additional Information Although I am unable to find off-screen footage of the game's attract mode to confirm the demo does crouch and turn, I have been asking around and even Japanese arcade game fans are divided on whether the game was a 4-way or 8-way game on release.
Github Commit
Regression Version
Affected Sets / Systems wndrmomo
Attached Files
gif file icon wndrmomocrouch.gif (317,845 bytes) Aug 24, 2022, 09:48 Uploaded by tepidsnake
A GIF demonstrating the attract mode demo crouching and turning, which at the time of writing is not possible by the player in MAME.
There are no relationship linked to this issue.
User avatar
Aug 24, 2022, 10:25
edited on: Aug 24, 2022, 11:35
The Wonder Momo release was covered in:
Game Machine No. 304 – March 15, 1987 (page 14)

Release date: February 27th 1987.
Two lines stand out from the article:

The controls make full use of the 8-way lever and 2 buttons (kick, jump).

ROM kit sales only, OP price 58,000 yen.

The game was also covered in Namco’s NG Magazine

A full scan of the issue is available on
NG Namco Community Magazine (Monthly Issue 5) - March 1987
(pages 10-11)

The text on one of the screenshots on page 11:

The controls are simple.
8-way lever and the A button is the attack button, and the B button is the jump button.
By using both A and B buttons, there are 6 attack patterns.
User avatar
Steve Coomber
Aug 24, 2022, 14:44
Great spot. I have put in a fix that corrects this issue.