04172: All set in hvyunit.c: Enemies stop appearing during Stage 5-2.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04172	Gameplay	Major	Always	Jan 6, 2011, 06:23	Feb 27, 2019, 17:20

Tester	DRG	View Status	Public	Platform	MAMEUI
Assigned To		Resolution	Open	OS
Status [?]	Acknowledged			Driver	kaneko/hvyunit.cpp
Version	0.141	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	04172: All set in hvyunit.c: Enemies stop appearing during Stage 5-2.
Description	In Stage 5-2, after a blue windmill like thing, the screen stops scrolling and there is no enemies. The game just stays in this screen, music and control of the ship works (even the background animation works) but no enemy appears, making impossible to advance any further. I waited a long time in case anything happens, but nothing.
Steps To Reproduce	Just play the game until pass that blue windmill like thing.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	All set in hvyunit.c

Attached Files	0001.png (16,965 bytes) Jan 6, 2011, 11:49
Attached Files	0002.png (17,378 bytes) Jan 6, 2011, 11:49

No.07016 Fujix Administrator Jan 6, 2011, 07:07	I played through with a cheat and the game didn't stay at the point. A cheatish confirmation is not valid, if possible, could you post your inp recording without using a cheat? Thank you.
No.07018 Fujix Administrator Jan 6, 2011, 12:01	Confirmed the issue. Uploaded screenshots and sta.
No.07019 Haze Senior Tester Jan 6, 2011, 17:07 edited on: Jan 6, 2011, 17:07	are you sure this isn't being caused BY the save state? the driver doesn't officially support save states. people have reported this as possible to finish..
No.07020 Fujix Administrator Jan 6, 2011, 18:17	Yes, it's possible. Let me suspend the confirmation.
No.07022 Layne Tester Jan 6, 2011, 20:37	Just played until that point without cheats / save state and I confirm the issue.
No.07023 Kale Developer Jan 6, 2011, 22:47	Assigned at the attention of Phil for obvious reasons.
No.08021 hap Developer Jan 9, 2012, 17:14	An easy way to reproduce: Run the game with cheats enabled and fast forward to 5-1 ( http://cheat.retrogames.com/ ). After killing the 1st boss (gray thing with facemask), when you're at those blue blobs that all shoot in a specific direction, turn off cheats and die once. The game continues onward from 5-2, turn on cheats again and the bug as described above will happen. The MCU rom is fine, and it's not a sync(quantum) problem. Most probable cause is mermaid emulation not being 100% accurate.
No.10038 Fujix Administrator Dec 2, 2013, 03:34	I got information on my site from "so" at http://www.e2j.net/bbs/bbs.cgi The author says, to make the boss appear in 5-2, you have to get some power-ups for the main shot (maybe full power-ups?). This game changes difficulty depends on how many power-ups you have, he says it should probably have to do with that. So this is not a bug but an original behaviour.
No.10044 NekoEd Senior Tester Dec 2, 2013, 18:39	It seems very strange to me that a released game would have such a nasty game-breaking bug. I propose reopening until we can compare against real hardware or do some kind of code analysis. It just doesn't feel right.
No.10050 Haze Senior Tester Dec 3, 2013, 22:48 edited on: Dec 3, 2013, 22:50	yeah, I don't think this is what is described.. the bug happening here renders the game unplayable, the machine could be left in an infinite cycle doing nothing.. is it even possible to die? if not the game is broken and the machine would need to be rebooted. this is a production game, not a prototype, so that seems to be unlikely it is possible 5-2 has a special behavior, but I don't think it gets handled properly in MAME. Could be the MCU is wrong for this set and there should be extra commands? (seems unlikely if they're all marked mermaid tho)
No.10051 NekoEd Senior Tester Dec 3, 2013, 23:46	I'm reopening this as Acknowledged, we're missing something here and I don't like it. Reopened because something just isn't right.
No.16174 MetalGod Senior Tester Feb 27, 2019, 17:20 edited on: Feb 27, 2019, 17:21	Tested with rom hvyunitu (USA version, the last version added). No cheats or savestates used. The error is still there. It can be seen in 8:00 and 10:50