Bios Dreamcast | RELIABLE |

The Dreamcast BIOS, also known as the "GD-ROM BIOS," was developed by Sega in collaboration with Hitachi, who manufactured the GD-ROM (Gigabyte Disc Read-Only Memory) drives used in the console. The BIOS is stored on a dedicated chip on the motherboard and is executed when the console is powered on.

Checking the 16MB of main RAM and the PowerVR2 graphics chip during boot. bios dreamcast