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Missing black row on the game "Pinball Tycoon (Europe)" #1668

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wwark opened this issue Feb 16, 2020 · 2 comments
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Missing black row on the game "Pinball Tycoon (Europe)" #1668

wwark opened this issue Feb 16, 2020 · 2 comments
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mGBA 0.9.3

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@wwark
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wwark commented Feb 16, 2020 •
edited

Hi,

You will find the screenshot of mgba:
unknown2
From a NDS
unknown

The missing black line is between the text zone (red dots and yellow dots) and the table of pinball.

The game switches from video mode 0 to 4 when the red dots begin.

Thanks,
@fleroviux
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The internal BG2/3 X/Y registers should only be incremented if the PPU is not in Mode 0 and the corresponding BG is enabled.

Because BG enable is latched with a delay of a few scanlines, the internal affine registers only start being incremented with the same delay, even when Mode 4 and BG2 are enabled at the same time.

@endrift endrift added this to the mGBA 0.9.3 milestone Sep 22, 2021
endrift added a commit that referenced this issue Sep 23, 2021
@endrift
GBA Video: Delay enabling backgrounds in bitmap modes (fixes #1668)
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@endrift
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endrift commented Sep 23, 2021

Thanks for doing the legwork here @fleroviux

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@wwark @endrift @fleroviux