If "developing" means changing the actual look or dimensions of the long piece:
Modifying or "developing" a specific piece like the "long piece" (I-piece) in a Tetris ROM for MAME generally requires or using cheat codes , as the game's logic is hardcoded into the original binary.
: 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
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.
: 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. If "developing" means changing the actual look or
: 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
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 ROM Hacking (Assembly) The easiest way to "develop"
: 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."