06893: All multitap games: Bugged inputs when 2 multi-tap inserted

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06893	DIP/Input	Major	Always	Feb 27, 2018, 14:33	Mar 3, 2018, 20:10

Tester	vikbez	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Acknowledged			Driver	sega/saturn.cpp
Version	0.194	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06893: All multitap games: Bugged inputs when 2 multi-tap inserted
Description	When 'multitap' are set for slot ctrl1 and ctrl2, all the buttons for all the gamepads configured are then ultra fastly repeated when kept pressed (like a turbo controller), resulting in the game unable to play properly. Except the repeat rate, all the configured gamepads for the now present multitaps works correctly. The problem only happens when there are 2 multitaps. (only 1 multitap works fine) Also reproduced on sdlmame 64 bits 0.194 for osx
Steps To Reproduce	run saturn bomberman on saturneu ingame settings menu > slot devices > set ctrl1 and ctrl2 to multitap > reset wait for screen title, press start, keep down arrow button pressed on controller 1 to observe the too-fast repeat rate
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	All multitap games

Attached Files

No.14792 vikbez Tester Feb 28, 2018, 13:01	I also tried this on Street Racer and could reproduce the issue. However, tested on Megaman X3, the game behaves correctly. It seems that only multitap compatible games are affected.