Sega Master System Japanese BIOS Quick Solder Mod Kit
A quick solder Japanese BIOS which solders to the underside of a 28-Pin DIP BIOS in a Sega Master System model 1 or model 2. This can then be wired to a switchless region mod with BIOS support to enable the Japanese BIOS mode when set to the Japanese region. The console’s standard DIP BIOS will work in all other regions.
This is designed to work best with the Consoles Unleashed quick solder switchless region mods available for Sega Master System model 1 and model 2.