07964: akumajoun: Getting on the High Score table does one of the following, all resulting in weird behavior

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07964	Core	Major	Always	May 3, 2021, 20:54	May 5, 2021, 00:27

Tester	Cow	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10 (64-bit)
Status [?]	Confirmed			Driver	konami/hcastle.cpp
Version	0.231	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07964: akumajoun: Getting on the High Score table does one of the following, all resulting in weird behavior
Description	in Haunted Castle's Japanese N Version, Getting a high score either soft resets itself or slows down performance shown here:
Steps To Reproduce	Play the game until you reach a score that gets on the high score table. Added by Tafoid: A quick way to do this is to run the game with -debug, start the game and when the game start, paste: maincpu.pb@1912=9 That will change your score to 90000 and you can just fast forward emulation letting you take damage to game over. If someone needs a save state, I can provide one.
Additional Information	the bug doesn't occur on any other clone. Only akumajoun
Github Commit

Flags
Regression Version	0.148u2
Affected Sets / Systems	akumajoun

Attached Files	Mame 2021.05.04 - 15.23.41.04.mp4 (3,678,198 bytes) May 4, 2021, 20:33 Uploaded by Cow Another reset

No.18796 Tafoid Administrator May 4, 2021, 00:27 edited on: May 4, 2021, 21:03	Did some tracing first on release version then day by day and determine a strong probability for regression happening: https://github.com/mamedev/mame/commit/7c0baa1f6dd0ef221a89ec0f48ec91e0fe82668f March 4, 2013 * Rewrite of 6809/6309/konamicpu cores. 6809 should be cycle exact based on the 6809 datasheet. Inferred 6309 cycle exact timings. Not sure about the Konami timings; they are definitly different from the previous core but the previous timings were a guess.
No.18798 Cow Tester May 4, 2021, 02:32 edited on: May 4, 2021, 02:44	Tested and the bug doesn't trigger on MAME 0.147. Couldn't find MAME 0.148u2 so I used 0.149 instead
No.18802 Haze Senior Tester May 4, 2021, 14:56	how strange, I wonder if it's actually a bug in this revision of the game (or if it's a bad dump that still passes the startup checks) would have come to light quickly if it ended up on location like this, but it's very strange it only happens in this set.
No.18808 Haze Senior Tester May 4, 2021, 22:53	the regression makes it all the more interesting
No.18809 Cow Tester May 5, 2021, 00:24 edited on: May 5, 2021, 00:32	huh. Once in a blue moon, the game actually doesn't bug out and plays normally after the high score screen and I accidently deleted the video.... Yipeeee