08165: Inputs not active during first frame

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08165	DIP/Input	Minor	Always	Dec 27, 2021, 11:33	Jan 30, 2022, 11:19

Tester	hap	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10/11 (64-bit)
Status [?]	Confirmed			Driver
Version	0.238	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08165: Inputs not active during first frame
Description	Inputs are not active during the first frame after cold boot or hard reset. I think it only applies to inputs obtained from the OSD (keyboard, gamepad, etc).
Steps To Reproduce	This is a bug in the MAME core, it can affect any driver. I found an easy test case with im05, though that set has been added late december 2021, it will be in MAME 0.240. One of the first things im05 does is check the keypad, and it enters a routine if one of the buttons was pressed. This happens in the 1st timeslice before the first frame is drawn. - mame im05 -noskip_gameinfo - at the gameinfo popup, hold "b" on keyboard - game starts and shows "b" on the display again: - mame im05 -noskip_gameinfo - press any key to start - hold "b" on keyboard - while holding "b", press F3 to do a soft reset - game shows 4 dashes The 2nd one is correct. It will show 4 dashes if you hold "b" at power-on, but does not happen in MAME unless you do a soft reset.
Additional Information	I think what happens in general is: - start MAME - emulate 1 frame - enter 'vblank' - draw frame - check inputs - emulate 1 frame - enter 'vblank' - draw frame - check inputs - etc want: - start MAME - check inputs - emulate 1 frame - enter 'vblank' - draw frame - check inputs - emulate 1 frame - enter 'vblank' - draw frame - check inputs - etc
Github Commit

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Affected Sets / Systems

Attached Files	soccer2_pro.jpg (60,475 bytes) Jan 30, 2022, 11:15 Uploaded by hap Mattel Soccer 2 manual excerpt

No.19735 hap Developer Jan 30, 2022, 11:19	Another test case is msoccer2 (will be in MAME 0.241), where pro mode does not work unless you do it via a soft reset. Easy way to test pro mode: does hi/lo kick button work(makes a beep sound)? if yes: then you're in pro mode, otherwise rookie mode.