Viewing Issue Advanced Details
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
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
mp4 file icon pinkcloud.mp4 (3,942,487 bytes) Dec 7, 2022, 01:09 Uploaded by Cow
MAME
zip file icon parodiusj.zip (5,326 bytes) Dec 9, 2022, 20:44 Uploaded by Cow
save for stage 9 (bug is much more noticeable here)
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Notes
8
User avatar
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.
User avatar
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.
User avatar
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
User avatar
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
User avatar
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.
User avatar
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.
User avatar
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?
User avatar
No.20959
hap
Developer
Dec 15, 2022, 12:37
Those opcodes are konami specifc.