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Windows 64-bit 0.10-7496: Faceball 2000 is SLOW #2537

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Pr3ttyF1y opened this issue May 30, 2022 · 5 comments
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Windows 64-bit 0.10-7496: Faceball 2000 is SLOW #2537

Pr3ttyF1y opened this issue May 30, 2022 · 5 comments
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platform:GB/GBC Game Boy/Game Boy Color-related issues
Milestone
mGBA 0.10.3

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@Pr3ttyF1y
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So I know that this game had bad FPS back in the day and unfortunately I do not have real hardware to test, but I was testing out the Faceball 2000 DX romhack that patched the game to supposedly run better in GBC mode - and it was barely playable in this patched state.

So I went back to the original rom (verified to No-Intro hashes), and game play is SUPER slow. Like slightly worse than a slide show slow.

Interestingly, the demo that plays before the title seems to be about the appropriate speed, but there definitely is something wrong with the game play. It's way too slow to the point that it's not playable (each tick of the time = about 7 real time seconds per my phone's stop watch).

mGBA is running the ROM in straight DMG mode as it's not a Super Game Boy enhanced ROM (per my config).
@Pr3ttyF1y Pr3ttyF1y changed the title Windows 0.10-7496: Faceball 2000 is SLOW Windows 64-bit 0.10-7496: Faceball 2000 is SLOW May 30, 2022
@Testsr
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Testsr commented May 31, 2022 •
edited

Can confirm that Faceball 2000 is slow in 0.9.3, relative to Sameboy. I am attaching bugreport zip
Reports.zip

@endrift endrift added this to the mGBA 0.10.1 milestone Jun 6, 2022
@endrift endrift added platform:GB/GBC Game Boy/Game Boy Color-related issues blocked:needs hw testing May be present on actual hardware, but need confirmation software:romhack Issues in ROM hacks labels Jun 6, 2022
@Pr3ttyF1y
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https://www.youtube.com/watch?v=OKDKR_rgoQU

Starting @ 1:08 in the above video, you can see two linked GBA SPs playing Faceball 2000 for DMG and the speed is much faster than current mGBA.

It's weird that the audio is fine, but just the graphics rendering is slow, but hopefully this is the needed confirmation.

Also, I wouldn't flag this as romhack specific. While a romhack triggered my interest, the original rom displays the issue (much more severely than the romhack).

@endrift endrift removed blocked:needs hw testing May be present on actual hardware, but need confirmation software:romhack Issues in ROM hacks labels Jun 9, 2022
@endrift
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endrift commented Jun 9, 2022

My mistake. The hardware testing label was specifically in reference to it being a ROM hack, but that was in error so I removed both.

@Pr3ttyF1y
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I've done some more testing, now with version Revision 7567-c1b1f72 and I believe the issue is related to link cable polling.

If you generate a new multi-player window and load up Faceball 2000 in both and play the game linked, while there is some graphical glitching (blinking of the status bar) on player #1's HUD, the game otherwise plays at a reasonable speed. I'm not sure if it's 100% perfect, but I'm thinking something must be going on relating to the link cable ability of this game when being played in single player mode that's crushing the performance.

@endrift endrift modified the milestones: mGBA 0.10.1, mGBA 0.10.2 Nov 20, 2022
@endrift endrift modified the milestones: mGBA 0.10.2, mGBA 0.10.3 Mar 20, 2023
endrift added a commit that referenced this issue May 8, 2023
@endrift
GB SIO: Disabling SIO should cancel pending transfers (fixes #2537)
84d600c
@endrift endrift closed this as completed in 36e62c0 May 8, 2023
@endrift
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endrift commented May 8, 2023

@Pr3ttyF1y's analysis was correct, it was link cable related.

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platform:GB/GBC Game Boy/Game Boy Color-related issues
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