08543: megablst and clones: Shield powerup aura on option is missing

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08543	Graphics	Minor	Always	Jan 6, 2023, 22:37	Jan 11, 2023, 16:52

Tester	Cow	View Status	Public	Platform	MAME (Official Binary)
Assigned To	Haze	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver	taito/taito_f2.cpp
Version	0.251	Fixed in Version	0.252	Build	64-bit
		Fixed in Git Commit	d7a08de	Github Pull Request #

Summary	08543: megablst and clones: Shield powerup aura on option is missing
Description	The green powerup is supposed to have a glowing aura on the option the ship touched it with. This is missing entirely on MAME
Steps To Reproduce	Play the game Collect the Green sphere icon Glowing aura around the option will not appear
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	megablst and clones

Attached Files	Mame 2023.01.06 - 16.33.24.04 Trim-1.mp4 (3,894,901 bytes) Jan 6, 2023, 22:37 Uploaded by Cow Mega Blast

No.21000 Tafoid Administrator Jan 7, 2023, 13:06 edited on: Jan 7, 2023, 13:08	I would say it is a minor graphic issue - I didn't see a regression checking some older builds (tested back to setname change between 0.136 and 0.137 with same behavior). Good to have noted, however. You can see it in the demonstration screen about 22-23 seconds in the ship picks up a green orb with the rear laser. You can also see this working on the PCB recorded video.
No.21001 Haze Senior Tester Jan 8, 2023, 12:57	in the machine config, add the 'partial_buffer_delayed' bit here MCFG_VIDEO_START_OVERRIDE(taitof2_state,megab) m_screen->set_screen_update(FUNC(taitof2_state::screen_update_pri)); m_screen->screen_vblank().set(FUNC(taitof2_state::screen_vblank_partial_buffer_delayed)); the orbs will appear. most of the other games in the driver have this set, but this one doesn't, so I don't know if it causes other issues elsewhere in the game. there's a big blurb in the driver about how the games handle sprites and why sometimes it's needed (Taito hardware is not well understood)
No.21002 Haze Senior Tester Jan 8, 2023, 13:14	(also since it acts as an indicator to how much shield you have left I'd say this was actually a major glitch, the game is basically broken without it showing)