06228: megadriv [comix], genesis [comixu]: Comix Zone Title Screen

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06228	Graphics	Minor	Always	May 29, 2016, 18:37	2 days ago

Tester	MJY71	View Status	Public	Platform	MAME (Official Binary)
Assigned To	Kale	Resolution	Fixed	OS	Other
Status [?]	Resolved			Driver	sega/mdconsole.cpp
Version	0.174	Fixed in Version	0.280GIT	Build	64-bit
		Fixed in Git Commit	df41206	Github Pull Request #	#14038

Summary	06228: megadriv [comix], genesis [comixu]: Comix Zone Title Screen
Description	There is a strange graphical split to the title screen in Comix Zone (any region or version) after the background image 'rolls down' to reveal itself. The background image shifts down half the screen, and bottom part of the background image reappears at the top of the screen. Foreground logo, text, copyright information and menu options are not affected.
Steps To Reproduce	Simply run any of the Comix Zone game versions for any region and wait for the title screen. I used the official MAME 0.174 64-bit binary with the integrated UI with all supported Software List ROMs. I am using Windows 10 Pro x64, and the MAME folder is completely clean (not copied over a previous version), freshly extracted, with only modifications to the ROMs path performed.
Additional Information	I cannot remember with any certainty if there was a previous version of MAME or MESS where this did not happen. I am fairly certain that it this has been present for the last 2 or 3 MAME versions. It does not occur with various other Sega emulators I have tried, though. I thought this might be something worth looking into and perhaps be an easy fix.
Github Commit

Flags
Regression Version
Affected Sets / Systems	megadriv [comix], genesis [comixu]

Attached Files	Screenshot 2016-05-27 17.43.01.png (1,144,436 bytes) May 29, 2016, 18:37 Uploaded by MJY71 Comix Zone Title Screen
Attached Files	0000.png (16,171 bytes) May 29, 2016, 19:43 Uploaded by B2K24 genesis comixu 0.174

No.12733 B2K24 Senior Tester May 29, 2016, 19:42	Confirmed also with -video d3d and -video gdi Attaching F12 Snapshot
No.16368 280696516 Tester Apr 24, 2019, 09:05	if select options,and go back to title,the screen goes normal.(208)
No.23607 Andrew Tester 2 days ago	I appreciate the improvement made but there is still a graphical glitch at the bottom of the title screen that is visible while the title screen rolls down. https://imgur.com/a/qfpu3qb Also, on load it jumps straight to the fancy SEGA intro. On my Genesis, on first boot, I see the "PRODUCED BY OR UNDER LICENSE FROM SEGA ENTERPRISES LTD." screen then the fancy SEGA intro.