08317: pcega [arknoid2 and clones]: Screen flickers and doesn't refresh properly

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08317	Graphics	Major	Always	May 18, 2022, 01:01	Jun 8, 2022, 01:19

Tester	ICEknight	View Status	Public	Platform	MAME (Official Binary)
Assigned To	crazyc	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver	pc/ibmpc.cpp
Version	0.243	Fixed in Version	0.245	Build	64-bit
		Fixed in Git Commit	1f5ab99	Github Pull Request #

Summary	08317: pcega [arknoid2 and clones]: Screen flickers and doesn't refresh properly
Description	Only when an EGA card is used, the screen will heavily flicker and all sprites leave a trail behind. Also, the scrolling text in the intro doesn't properly scroll.
Steps To Reproduce	-First load the pcega driver (or another one where you've assigned an EGA card) -Go to File Manager/harddisk1 and load msdos5 before the PC starts booting. -Go to File Manager/floppydisk1 and load arknoid2 or arknoid2a. -Then enter: A: DOH -When prompted, make sure that EGA/CGA graphics are selected (and MOUSE isn't selected if the drivers aren't installed). It's advisable to throttle the loading process as much as needed, as it takes a while.
Additional Information	CGA mode and EGA/VGA mode with a VGA card seem to behave properly. A similar problem happens in bublboble, another game in Taito's "Fun Time Arcade" series.
Github Commit

Flags
Regression Version
Affected Sets / Systems	pcega [arknoid2 and clones]

Attached Files	0004.png (10,976 bytes) May 18, 2022, 01:01 Uploaded by ICEknight Gameplay screenshot
Attached Files	0006.png (13,301 bytes) May 18, 2022, 01:02 Uploaded by ICEknight Same problem in bublbobl

No.20198 ICEknight Tester May 18, 2022, 01:02	Attached a screenshot of the same problem happening in bublbobl.
No.20290 ICEknight Tester Jun 5, 2022, 11:19 edited on: Jun 5, 2022, 20:34	bublbobl has been fixed with this commit: https://github.com/mamedev/mame/commit/ad7cbf9c0a1d888d28d70b2c29c20350592482e0 arknoid2 now has the intro text and screen trails fixed but the racket and ball flicker heavily. Everything else seems to behave cotrrectly now.
No.20301 ICEknight Tester Jun 8, 2022, 01:19	There's still some sprite flickering going on in the latest builds after the fixes, is that confirmed to be normal behavior then?