Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08275 Graphics Minor Always Mar 28, 2022, 12:51 6 days ago
Tester MidnightWolf View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10/11 (64-bit)
Status [?] Confirmed Driver
Version 0.241 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08275: thndrx2, thndrx2a, thndrx2j: [possible] Graphical corruption during stage 2
Description On Thunder Cross 2, graphical corruption appears at the bottom of the screen, whenever the screen scrolls up or down during stage 2.
Steps To Reproduce - Start playing Thunder Cross 2 as normal.

- Play stage 2 as normal.

- When the route splits near the start of the level, when the screen scrolls up or down graphical corruption appears at the bottom of the screen.

- When the routes converge near the end of the level, when the screen scrolls up or down, graphical corruption appears at the bottom of the screen.
Additional Information
Github Commit
Flags Possible
Regression Version 0.219
Affected Sets / Systems thndrx2, thndrx2a, thndrx2j
Attached Files
png file icon 001.png (688,728 bytes) Mar 29, 2022, 14:52 Uploaded by MidnightWolf
Bottom lines of screen scrolling up causes corruption
MidnightWolf
png file icon 002.png (753,067 bytes) Mar 29, 2022, 14:53 Uploaded by MidnightWolf
MidnightWolf
png file icon 004.png (937,350 bytes) Mar 29, 2022, 15:03 Uploaded by MidnightWolf
png file icon 005.png (929,443 bytes) Mar 29, 2022, 15:03 Uploaded by MidnightWolf
png file icon 006.png (718,405 bytes) Mar 29, 2022, 15:04 Uploaded by MidnightWolf
MidnightWolf
png file icon 007.png (694,601 bytes) Mar 29, 2022, 15:04 Uploaded by MidnightWolf
MidnightWolf
Relationships
related to 06790ResolvedMetalliC  suratk: Missing star field background rotation 
Notes
6
User avatar
No.19964
Tafoid
Administrator
Mar 29, 2022, 11:55
If you are posting issue about graphics, you need to attach some screenshots as to when it happens and reference screenshots on how it is supposed to happen. Is it a regression? Did it work in MAME correctly before?
User avatar
No.19965
MidnightWolf
Tester
Mar 29, 2022, 15:00
edited on: Mar 29, 2022, 15:13
I have checked all versions of MAME back to 0.235

Can confirm that the bug is present in 0.235, 0.236, 0.237, 0.238, 0.239, 0.240 and 0.241. I am unable to test earlier versions of MAME as i do not have them installed.

Screen shots uploaded. please notice the bottom of the screen, where graphics have a scrolling error and get broken when the screen scrolls up or down where the player is forced to choose a path at the beginning of stage 2, and where paths converge before the stage 2 boss at the end of the level.

I do not have any reference material of the official arcade machine, but highly doubt that this is correct behaviour. This bug does not occur in any version of FinalBurn Neo (FBNeo) emulator that i have tested.
User avatar
No.19967
Tafoid
Administrator
Mar 29, 2022, 22:29
edited on: Mar 29, 2022, 22:33
I can confirm the behavior and a regression version - but until I can see a play of the original PCB, I will reserve full judgement. It may be excess stuff normally not seen off screen - much like the NES has a row of graphics as it scrolls up/down.

Flagged as possible.
User avatar
No.19968
Tafoid
Administrator
Mar 29, 2022, 22:47
Traced to this commit:
https://github.com/mamedev/mame/commit/9c50204b231ec539f051b00e423e947721d85d6e
- k052109.cpp fix/cleanup tilemap scrolls, fixes fuusenpn and MT6790

Unknown if it exposed actual PCB behavior or not which is why this is still flagged possible.
User avatar
No.20421
M.A.S.H.
Senior Tester
10 days ago
In MAME 0.247GIT the bug is still there.

Implemented shadow configuration bits for konami/k051960.cpp:
https://git.redump.net/mame/commit/?id=f5193fabfad7bc99ff8d4488de062c8de2a90ad6
User avatar
No.20430
MidnightWolf
Tester
6 days ago
I found some real PCB footage that somebody (not me) has uploaded to YouTube.



If you skip to the 4:23 time mark, you can see that this bug does not happen on the original arcade PCB hardware.