WinUAE Galaga 92 screen glitching

13 January 2017, 10:00

Has anyone any experience with the minor masterpiece game Galaga 92 on WinUAE? While my real A1200 is waiting for repairs I thought I'd see how emulation feels again and fired up this game only to get game-breaking screen glitching. I updated WinUAE to the latest with no improvement.

The whole screen is flashing green every few frames, both on the title screen and during gameplay. Additionally, scrolling text at the bottom of the screen is being pushed off the bottom of the screen and only the top of the letters is visible. I tried tweaking many display settings in WinUAE but nothing improved matters. Fullscreen and windowed is the same.

This was on a WHDLOAD version of the game that runs perfectly on my real A1200. WinUAE is set to emulate an A1200, and I haven't yet tried running a different version of the game or emulating an A500.

Toni Wilen · 13 January 2017, 11:22

What kind of A1200 config? Too fast emulation mode (at least without immediate blitter) can break lots of games.

13 January 2017, 11:34

Couldn't give any real details until I'm home, but nothing exciting. I seem to think I have just standard A1200 / AGA / 2MB Chip + 8MB Fast / normal A1200 speed selected, but I don't remember what settings there are. Will report back when I know more.

Steve · 13 January 2017, 11:47

Try turn off JIT setting.

13 January 2017, 23:43

Enabling Cycle-Exact under Chipset has solved this. Not sure why I didn't have this checked before. Messing with the Filters page has sorted the remaining display issues, guess it was an overscan thing.

13 January 2017, 10:00	#1
WildW Posts: n/a	WinUAE Galaga 92 screen glitching Has anyone any experience with the minor masterpiece game Galaga 92 on WinUAE? While my real A1200 is waiting for repairs I thought I'd see how emulation feels again and fired up this game only to get game-breaking screen glitching. I updated WinUAE to the latest with no improvement. The whole screen is flashing green every few frames, both on the title screen and during gameplay. Additionally, scrolling text at the bottom of the screen is being pushed off the bottom of the screen and only the top of the letters is visible. I tried tweaking many display settings in WinUAE but nothing improved matters. Fullscreen and windowed is the same. This was on a WHDLOAD version of the game that runs perfectly on my real A1200. WinUAE is set to emulate an A1200, and I haven't yet tried running a different version of the game or emulating an A500.

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13 January 2017, 11:22	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,535	What kind of A1200 config? Too fast emulation mode (at least without immediate blitter) can break lots of games.

13 January 2017, 11:34	#3
WildW Posts: n/a	Couldn't give any real details until I'm home, but nothing exciting. I seem to think I have just standard A1200 / AGA / 2MB Chip + 8MB Fast / normal A1200 speed selected, but I don't remember what settings there are. Will report back when I know more.

13 January 2017, 11:47	#4
Steve I Identify as an Ewok Join Date: Jul 2001 Location: North Lincolnshire Age: 45 Posts: 2,356	Try turn off JIT setting.

13 January 2017, 23:43	#5
WildW Posts: n/a	Enabling Cycle-Exact under Chipset has solved this. Not sure why I didn't have this checked before. Messing with the Filters page has sorted the remaining display issues, guess it was an overscan thing.

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