06899: gyrodine, gyrodinet, buzzard: Helicopter shadow on the pcb is different from the one shown in Mame

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06899	Graphics	Minor	Always	Mar 4, 2018, 09:53	Mar 5, 2018, 00:36

Tester	Kold666	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10 (64-bit)
Status [?]	Confirmed			Driver	misc/kyugo.cpp
Version	0.195	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06899: gyrodine, gyrodinet, buzzard: Helicopter shadow on the pcb is different from the one shown in Mame
Description	Helicopter shadow on the pcb is different from the one shown in Mame see pic Verified on my personal collection pcb and a couple of Yahoo auctions pics
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	gyrodine, gyrodinet, buzzard

Attached Files	gyro.PNG (633,786 bytes) Mar 4, 2018, 09:53 Uploaded by Kold666
Attached Files	gyro2.jpg (258,148 bytes) Mar 4, 2018, 09:55 Uploaded by Kold666

No.14800 Haze Senior Tester Mar 5, 2018, 00:36	talking this through with Kold I can only assume that original gyrodine boards have issues with rendering flipped tiles. the shadow sprite is a perfectly normal sprite in spriteram, the only thing special about it seems to be that it gets drawn with the flip bit set, which apparently corrupts the sprite. there are weird lines around some of the background tiles too which makes me think similar is happening there, as if once flipped they end up slightly offset and misaligned. since there are multiple sources showing the very same issues it must be an issue that affects at least the majority of PCBs for the game, and probably one MAME should emulate at some point, even if it looks awful.

No.14800

Haze

Senior Tester

Mar 5, 2018, 00:36

talking this through with Kold I can only assume that original gyrodine boards have issues with rendering flipped tiles.

the shadow sprite is a perfectly normal sprite in spriteram, the only thing special about it seems to be that it gets drawn with the flip bit set, which apparently corrupts the sprite.

there are weird lines around some of the background tiles too which makes me think similar is happening there, as if once flipped they end up slightly offset and misaligned.

since there are multiple sources showing the very same issues it must be an issue that affects at least the majority of PCBs for the game, and probably one MAME should emulate at some point, even if it looks awful.