BIOS Setup
Dreamcast needs no BIOS
Almost every Dreamcast game runs on iFly's built-in HLE BIOS (Reios). You only need a real BIOS for the arcade systems (Naomi, Naomi 2, Atomiswave, System SP).
Put BIOS files in the BIOS/ folder. Names are case-normalized to lowercase, and MAME romsets must keep their exact basename.
| System | File | Required | Notes |
|---|---|---|---|
| Dreamcast | dc_boot.bin | Optional | Boot animation only. HLE BIOS (Reios) is used by default. |
| Dreamcast | dc_flash.bin | Optional | Flash / NVRAM (clock, settings). Pair with dc_boot.bin for full accuracy. |
| Naomi | naomi.zip | Required | MAME romset. Basename must match exactly. |
| Naomi 2 | naomi2.zip | Required | MAME romset. |
| Atomiswave | awbios.zip | Required | MAME romset. |
| System SP | segasp.zip | Required | MAME romset. |
| House of the Dead 2 | hod2bios.zip | Optional | Game-specific board. |
| Ferrari F355 | f355bios.zip / f355dlx.zip | Optional | Challenge / Deluxe variants. |
| Airline Pilots | airlbios.zip | Optional | Also covers Sega Strike Fighter. |