: Use a tool like Tile Layer Pro to open the ROM and find the graphics (sprites) for the I-piece. You can redraw it, though its "hitbox" is defined by the code, not the art.
: You can use the MAME debugger ( -debug ) to find the memory address that stores the "Next Piece" ID and manually freeze it to the value of the long piece. 2. ROM Hacking (Assembly) Tetris Rom Mame
If you are looking to manipulate the game to give you more long pieces or change their behavior, here are the primary methods: 1. MAME Cheat Engine : Use a tool like Tile Layer Pro
: Many Tetris ROMs (like the Atari or Sega versions) have existing cheat files available at Cheat Engine that allow you to "Always get I-piece." To permanently change the game code, you must
: Change the instruction so it always returns the ID for the long piece (often 00 or 01 depending on the version).
To permanently change the game code, you must modify the ROM's assembly. Most classic arcade Tetris versions (e.g., Sega System 16 ) use or 68000 processors.