07461: nes [ngaiden2]: Graphics corruption in Level 2

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07461	Graphics	Minor	Always	Oct 22, 2019, 20:28	Sep 30, 2022, 07:20

Tester	Gryzor1363	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Confirmed			Driver	nintendo/nes.cpp
Version	0.214	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07461: nes [ngaiden2]: Graphics corruption in Level 2
Description	Right from the start of the level, background scrolling is corrupted. And, as soon as the player moves enough for the train in the foreground to scroll as well, the whole scene becomes entangled as some sort of overlapping effect involving both depths appears along with heavy flickering. Level can absolutely be cleared in spite of this, as it is in no way a game-breaking issue. Indeed bar some visual annoyance, scene remains consistent enough to understand how to make your way forward, albeit with some trial and error. Strangely, as it may seem that it's a frequency-related issue, the attachment does not represent the level of degradation experienced while in-game, and was added for the sake of bringing some visual illustration to the issue described.
Steps To Reproduce	Reach level 2 and start moving.
Additional Information	Tested with MAMEUI64 0.214. The only bug I have witnessed so far in the game, of which I have passed almost all levels bar the two last ones. Dysfunction seems specific to the scrolling effects involved in that sole level.
Github Commit

Flags
Regression Version
Affected Sets / Systems	nes [ngaiden2]

Attached Files	0014.png (7,821 bytes) Oct 22, 2019, 20:28 Uploaded by Gryzor1363 Vague approximation of the occurrence. Consider visible glitches/artifacts to be all over the screen with flicker.

No.17122 Tafoid Administrator Oct 23, 2019, 00:08	You state 0.214 is the regression version - does this mean 0.213 works as expected?
No.17123 Gryzor1363 Tester Oct 23, 2019, 00:15 edited on: Oct 23, 2019, 00:30	It does not. Issue existed as far back as I recall, I think at least from 0.187. I filled this field it in while I shouldn't have. Modified the ticket consequently, my mistake.
No.17124 Tafoid Administrator Oct 23, 2019, 00:33	Ok. I can confirm. The driver is flagged as having imperfect graphics so issues like this are to be expected for some games. Despite not having a regression (which I suspect is a long while back, if at all), I'll accept and confirm this report.
No.17126 Gryzor1363 Tester Oct 23, 2019, 10:04	Appreciated Tafoid, thank you. Indeed I hesitated for quite some time in submitting this report considering the imperfect graphics flag and not being able to determine which version handled this section correctly, if at all, as you say. Only similar reports regarding minor graphics bugs by others that I noticed while browsing active threads led me to finally create a ticket on it, thinking devs could always benefit from the largest possible number of specific issues to look into possible common causes or problems in the future, while trying so solve outstanding issues on the Nes driver.
No.17127 Tafoid Administrator Oct 23, 2019, 10:25	NES driver, sadly, hasn't been touched in a meaningful way in a long time. Outside of a rewrite or importing a source compatible emulator which 'gets things more right', this may sit unresolved for a while.
No.17130 Gryzor1363 Tester Oct 23, 2019, 16:31	Indeed I always felt I counted among the minority group still actively and passionately clinging on to this driver and reporting anything I can :( But I have faith in the community, not a year comes without major improvements to once forgotten compatibility requirements, so I'll wait as long as I have to. Keep up the great work. Thx