Work in progress. This install guide will show you how to install a region free BIOS into a Sega Dreamcast VA0, VA1, and VA2.1 and how to reprogram the installed chip using Dreamshell.
Dreamcast VA1 Solder Map
Dreamcast VA0 Solder Map
Dreamcast VA2.1 Solder Map
Reprogramming Installed Region Free BIOS using Dreamshell