The FDSKey's disk flip fails to be recognised by a particular game: "Neunzehn - 19"
To reproduce it: load the game, press start a few times, then attempt to flip the disk when the side B prompt appears. It currently requires the user to eject the disk, reselect the image after some delay, then pick the new side for it to work.
I looked at the code to see what was causing this behaviour. It turns out that the game waits at least ~512ms (2 calls to Delayms with Y=0) between $4032 polls - unusually long compared to most games.
For reference, Mesen2 applies a fixed 2 second delay between ejecting the disk and inserting a new side. I suggest that the FDSKey either replicate this longer delay, or offer a setting to change the delay between disk flips so the user can choose a shorter delay in scenarios where this matters less.
The FDSKey's disk flip fails to be recognised by a particular game: "Neunzehn - 19"
To reproduce it: load the game, press start a few times, then attempt to flip the disk when the side B prompt appears. It currently requires the user to eject the disk, reselect the image after some delay, then pick the new side for it to work.
I looked at the code to see what was causing this behaviour. It turns out that the game waits at least ~512ms (2 calls to Delayms with Y=0) between $4032 polls - unusually long compared to most games.
For reference, Mesen2 applies a fixed 2 second delay between ejecting the disk and inserting a new side. I suggest that the FDSKey either replicate this longer delay, or offer a setting to change the delay between disk flips so the user can choose a shorter delay in scenarios where this matters less.