FCEUX doesn't handle leaving $4016 high correctly

Discuss emulation of the Nintendo Entertainment System and Famicom.

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frantik
Posts: 370
Joined: Tue Mar 03, 2009 3:56 pm

FCEUX doesn't handle leaving $4016 high correctly

Post by frantik » Wed Dec 09, 2020 5:58 pm

I don't know if this is a known bug, but if you leave $4016 set to 1, it's supposed to consistently return the status of the A button. I tested it out in Mesen and puNES and they work as expected, but FCEUX keeps flipping between 40/41 regardless of button presses

I was trying to get just the A button press using this technique but if it doesn't work on a common emulator then it's not that useful I suppose

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