08531: parodius and clones: Background in Level 7 & 9 does not move

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08531	Graphics	Minor	Always	Dec 7, 2022, 01:09	Dec 15, 2022, 12:37

Tester	Cow	View Status	Public	Platform	MAME (Official Binary)
Assigned To	hap	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver	konami/parodius.cpp
Version	0.250	Fixed in Version	0.251	Build	64-bit
		Fixed in Git Commit	879e21c	Github Pull Request #

Summary	08531: parodius and clones: Background in Level 7 & 9 does not move
Description	The pink clouds in the background do not move at all in MAME. Reference:
Steps To Reproduce	Reach the 7th stage
Additional Information	This also occurs in Level 9 but i can't get that far in the game because Level 8 has the worst gimmick i've ever seen in a shooting game.
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	parodius and clones

Attached Files	pinkcloud.mp4 (3,942,487 bytes) Dec 7, 2022, 01:09 Uploaded by Cow MAME
Attached Files	parodiusj.zip (5,326 bytes) Dec 9, 2022, 20:44 Uploaded by Cow save for stage 9 (bug is much more noticeable here)

No.20929 kmg Senior Tester Dec 7, 2022, 02:06	Since the clouds are moving in the sense that they're animated, to be clear here I think the issue is the multiple missing parallax raster splits. It's much easier to see on level 9 (graveyard) part of the arcade video.
No.20932 hap Developer Dec 7, 2022, 10:54	The tile chip uses rowscroll, but looks like it writes the same value to each row here.
No.20934 Haze Senior Tester Dec 7, 2022, 16:22	have all revisions been checked? given the chip supports rowscroll, it would be surprising to see any kind of raster used
No.20935 Cow Tester Dec 7, 2022, 17:06 edited on: Dec 7, 2022, 18:02	Haven't tested World set 2 yet. Only the Japanese and World set 1 edit: Confirmed the rowscroll isn't in any versions of Parodius Da
No.20937 hap Developer Dec 7, 2022, 17:23	I think it's more likely a bug with the cpu/memory than the gfx emulation. The game simply doesn't realize it's on a stage where it's supposed to rowscroll.
No.20957 hap Developer Dec 14, 2022, 21:19 edited on: Dec 14, 2022, 21:27	Yeah, it was a CPU emulation bug. Not a regression, it happens in 0.140 too (old version before 6809 rewrite). Easier way to test: 3rd loop in attract mode plays the pink clouds level. So just boot the game and hold INS for a while.
No.20958 Haze Senior Tester Dec 14, 2022, 22:27	are these bugs specific to the Konami implementation, or is it possible the base 6809 is bugged too?
No.20959 hap Developer Dec 15, 2022, 12:37	Those opcodes are konami specifc.