While some emulators use "High-Level Emulation" (HLE) to start games without a BIOS, having the original files provides several benefits:
Naming conventions are case-sensitive and vary by emulator. Incorrect naming is the most common reason for startup crashes. BIOS для Dreamcast - TV-Games.ru
By editing the dc_boot.bin file with a hex editor (look for the offset 0x7E30 for the swirl graphic), you can change the boot animation. Homebrew fans have replaced the swirl with Sonic, PenPen, or even a blue Linux logo.
Document version: 1.0 Last updated: 2025