BIOS
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The Sega Dreamcast BIOS has several known revisions:
- v1.004 or MPR-21068, found in Japanese consoles only
- v1.01c or MPR-21871, found in PAL consoles
- v1.01d or MPR-21931 or MPR-21933, found in consoles worldwide
- The Treamcast console uses a hacked version of this firmware with Chinese support.
- v1.022 or MPR-23588, found in U.S. and Japanese consoles
- Consoles with this revision BIOS have MIL-CD booting disabled.