: Look for the subroutine that generates a random number between 0 and 6.

: 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."

: Use a hex editor like HxD or a disassembler to locate and patch the specific bytes in the .zip ROM files. 3. Modifying the Long Piece Shape

: Change the instruction so it always returns the ID for the long piece (often 00 or 01 depending on the version).

The easiest way to "develop" or force a long piece without coding is using the MAME Cheat System. : Ensure your mame.ini has cheat 1 enabled.

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 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.