Playstation codes question: I remember ages ago playing Suikoden

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Playstation codes question:

I remember ages ago playing Suikoden II. I found a GS/CB/etc code that affected game speed. If I pressed L2, the game speed went up drastically. And when I pressed R2, the game speed went back to normal. Here's the lines of code:

D006211C 0001
800E3574 0001
D006211C 0002
800E3574 FFE9

My guess is these are 2 Joker commands. My question is: since joker commands are universal, are game speed up/normal codes universal as well? Or, does every game have their own version of a speed up/normal code(s)? I'm trying to engineer a way to have this feature as a joker command for any/all PSX games.