08910: hachamf: Discolored otter in title screen after bootup

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08910	Color/Palette	Minor	Always	Aug 31, 2024, 01:19	Sep 1, 2024, 06:56

Tester	JimCarlTay	View Status	Public	Platform	MAME (Official Binary)
Assigned To	hap	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver	nmk/nmk16.cpp
Version	0.269	Fixed in Version	0.270	Build	64-bit
		Fixed in Git Commit	f82e295	Github Pull Request #

Summary	08910: hachamf: Discolored otter in title screen after bootup
Description	Game: Hacha Mecha Fighter (all versions/sets) This is related to bug #7730. - https://mametesters.org/view.php?id=7730 Since version 0.268, the bug where the otter on the airplane in the title screen becomes discolored after the game boots up has returned. Thus, I have marked this version as the regression version. All versions are affected, thus I have only included the parent set's ROM name.
Steps To Reproduce	Load any version of the game and wait until after it boots up to see the discolored otter and airplane. It usually goes away when the attract mode's second loop starts, but there is expected to be no discoloration on the otter and airplane.
Additional Information	Screenshots are provided below to show the discoloration of the otter and airplane and the expected colors. Since this is a new occurrence of the bug, please do not mark this as a duplicate unless considered such.
Github Commit

Flags
Regression Version	0.268
Affected Sets / Systems	hachamf

Attached Files	0000.png (14,499 bytes) Aug 31, 2024, 01:19 Uploaded by JimCarlTay Expected colors for otter and airplane
Attached Files	0001.png (14,497 bytes) Aug 31, 2024, 01:19 Uploaded by JimCarlTay Discolored otter and airplane

No.22296 hap Developer Aug 31, 2024, 14:15 edited on: Aug 31, 2024, 15:41	It works ok when you underclock the main CPU to 8MHz. But this is not a fix, it introduces slowdowns that are not visible on pcb videos. edit Ok, it was actually too late sprite DMA (hence underclocking CPU got rid of the gfx glitch)
No.22298 JimCarlTay Tester Aug 31, 2024, 23:52	Was the CPU restored to its original clock speed after the DMA changes?
No.22299 hap Developer Sep 1, 2024, 06:56	The first half of my prev message? I was fiddling around with the clock speed on my local build, it was never uploaded to github.