Board Thread:Questions and Answers/@comment-25139420-20140707212930/@comment-14600979-20140707213331

"[VSYNC] Slows down the CPU so it doesn't try to draw the next frame before it finishes the current one (which causes flickering). Always use this when drawing moving images. The number is the time in 1/60ths of second between frames and you may have to increase this number in graphically intense games to avoid flickering. 0 skips the command while negative numbers are illegal."

"[WAIT] Pauses the [program] for the specified amount of time. The number is the amount of wait time in 1/60ths of a second. Rumor has it this command is the same thing as VSYNC : ^)"

(from Snailfacia function guide, articles on VSYNC and WAIT)