[Mod] LF2 Extra

[STM1993]

Can anyone explain how these JA moves actually work ..

You press both of them together but when I looked in data , I found the staring frame of the move was having frame number 210 ...

In walking and standing hit_j goes to something other than 210 (like hit_j:209)

That's exactly it. See here.

LF2 has two input detection systems.
One is the default input from state 0/1, the other one is hit_whatever.

When you simply press J, hit_j takes priority.
However, if press J+A together, the game gets "confused" and just uses the default input and goes to frame 210.

Same logic applies for D+A / D+J, but it goes to frame 110, which is not recommended because frame 110 has some important properties.

There are a couple of flaws with this system however.
* The default input detection has a longer buffer detection window than the hit_whatever's window. Which means it is actually possible to press J and get JA instead if you press it at a specific timing early.
* hit_whatever doesn't work if you run out of mana, which means you suddenly can't jump. Which also means this method is actually not recommended for characters who have -mp moves like Dennis(D>J) or Firen(D>J/DvJ).