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Key IRQ always happens at the same VCOUNT #2490

Closed

pinobatch opened this issue Apr 2, 2022 · 1 comment

pinobatch commented Apr 2, 2022

A program can tell that it's running on mGBA because the key IRQ always happens right at vblank.

To reproduce:

Build mGBA Qt 0.10-7193-a9ef7af3b on Xubuntu 21.10
Start the attached test ROM "Telling LYs?" tellinglys-gba-0.01.zip
Press all 10 buttons in any order
Watch the arrow sprite at the right side

Expect: Arrow moves after each press, followed by "Pass", as on my AGB-001

Actual: Arrow stays half off the bottom of the screen, followed by an "Incorrect behavior" screen

Related issues

mGBA Game Boy: Key IRQ always happens at the same LY #1232
Tracking: Telling LYs tracking bug pinobatch/little-things-gb#3

Member

endrift commented Apr 3, 2022

Given that this is caused by the frontend, not the core (the core itself is agnostic), this is a duplicate of #1232.

endrift closed this as completed

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