01862: burnforc, burnfrcj: Flickering/misplaced graphics in Service Mode

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
01862	Graphics	Minor	Always	Jun 3, 2008, 23:50	Jun 30, 2023, 02:53

Tester	Tafoid	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Open	OS	Windows 2000
Status [?]	Confirmed			Driver	namco/namcos2.cpp
Version	0.125u3	Fixed in Version		Build	Athlon
		Fixed in Git Commit		Github Pull Request #

Summary	01862: burnforc, burnfrcj: Flickering/misplaced graphics in Service Mode
Description	If you set service mode, exit MAME, then restart in Service mode - the red text denoting the selection will quickly be misplaced and displayed in many different areas in quick succession.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version	0.70u4
Affected Sets / Systems	burnforc, burnfrcj

Attached Files	Burning Force Service Problem.avi (405,504 bytes) Jun 3, 2008, 23:50
Attached Files	burnforc_mame0.256.mp4 (274,705 bytes) Jun 30, 2023, 02:50 Uploaded by Balthier

No.04730 hap Developer Jul 29, 2009, 19:39	This is POSIRQ related. Note: if you press F2 during boot or on the titlescreen, POSIRQ level is set to 0, and the glitch does not occur.
No.19109 M.A.S.H. Senior Tester Jul 17, 2021, 18:30	Bug still happen...? https://git.redump.net/mame/commit/src/mame/drivers/namcos2.cpp?id=30e547bc5ae1093d76c80ccca8e5f40ffc6cc004
No.21602 Balthier Tester Jun 30, 2023, 02:53 edited on: Jun 30, 2023, 04:13	Yes, this still happens, but I get it to trigger more when I am cycling through the screens with 9. I also got it to trigger when pressing F2 during boot and at the title screen. Added a video of it. EDIT: I also noticed a pattern when starting the game with service mode enabled first. Press 9 once to get to the SWITCH TEST screen and watch the time. At around 9 seconds I see the glitch for a few seconds, then at around 28-29 seconds it comes back again and stays.