You're looking for information about sgb2_boot.bin . Here's what I found:
The sgb2_boot.bin file is a specific boot loader used by the Super Game Boy 2 (SGB2), an updated version of the original Super Game Boy adapter. This file is required to initialize the SGB2 and enable it to communicate with the SNES. sgb2_boot.bin
sgb2_boot.bin is a boot file for the Sega Game Boy (SGB) and Super Game Boy (SGB2) consoles. The Game Boy is a handheld game console developed and published by Nintendo, while the Super Game Boy is an adapter that allows players to play Game Boy games on the Super Nintendo Entertainment System (SNES). You're looking for information about sgb2_boot
Keep in mind that the use of sgb2_boot.bin may be subject to copyright and intellectual property laws, as it is a part of the Super Game Boy 2 BIOS. sgb2_boot