Please Add turbo key function into emulator settings

[Desmont]

Good Day!

On what principle works Turbo Key?

Just when I clamp Turbo Key - then BlazBlue run with a great speed (as in the PSP). But this is not Frameskip. With the frameskip picture is jerky and freezes periodically, but with Turbo Key - everything is perfect (58 VPS).

I only have two questions:
1) Is it possible to make build in which the Turbo Key always holded?? For example in the form of a point in the settings?
2) Is it possible to make the Turbo Key can not accelerate more than 60 VPS? Because sometimes it is a 2D game gives 120 + VPS, that is too much ...

P.S. run on Chinese phone with MTK 6577 CPU (Dual Core 1 Ghz)

P.P.S. Saw build with point "VPS Limit" in the settings. However its on and off did not produce any effect.

Sorry for my very bad English.