IDASZ uses Aime cards (SEGA’s equivalent to Bandai Namco’s Banapassport). When online servers died, so did card saving. Reverse engineering the card reader’s serial protocol to spoof an offline server. This allows players to save their customized GR86 or RX-7 without SEGA’s cloud. v230 required specific firmware on the card reader (v1.41 or higher). "Work" here involves soldering FTDI chips onto the JVS I/O board to inject save data.
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For modern players, "work" on v2.30 often refers to the technical setup required to run this arcade-exclusive hardware on home PCs or handhelds like the Steam Deck. IDASZ uses Aime cards (SEGA’s equivalent to Bandai