To run Dreamcast games on modern hardware, an emulator needs to mimic the original console's internal software. This is handled by two primary files:

This is the main system ROM. It contains the startup sequence, the iconic orange swirl animation, and the instructions needed to boot game discs.

You can use tools like DreamShell and an SD card reader adapter for the Dreamcast's serial port, or a broadband adapter to rip the files over a local network.

Placement and naming vary slightly depending on which emulator you use.

The Dreamcast wasn't just a machine anymore; it was alive. Leo leaned back, the blue light of the TV reflecting in his eyes, and picked up the controller. The future was back online.