[Discussion] 60FPS patches for PSP games that run at 30FPS

[[Unknown]]

VIRGIN KLM: So, basically the function says "Okay, I'm done for now. It's been a long day, so I'm going to sleep. Wake me up in N vblanks or if a callback happens." (CB means the callback part.)

N is the parameter passed. Put another way:

sceDisplayWaitVblankStartMultiCB(0); <-- ERROR (silently does nothing.)
sceDisplayWaitVblankStartMultiCB(1); <-- waits for 1 vblank. Typically, 60 fps.
sceDisplayWaitVblankStartMultiCB(2); <-- waits for 2 vblanks. Typically, 30 fps.
sceDisplayWaitVblankStartMultiCB(10); <-- waits for 10 vblanks. This would be <= 6 fps.

The return value of the function is basically (except in the 0 case) always 0.

If the game says "wait 2 vblanks", you may be able to force it to wait 1 instead and run at 60 fps. Depending on how the game does its timing, this could also make the game run at 2x speed.

-[Unknown]