Modern systems use UEFI firmware, but the term “BIOS binary” is still common. The binary is stored on a SPI flash chip on the motherboard and can be updated (flashed) by the user or OEM tools.
If you have a Windows executable (e.g., YA4A194V0.exe ) from Lenovo or HP, you can extract the BIN:
The .bin file is a binary "dump" of the firmware. It is used when the laptop's BIOS is corrupted and the system will not boot, requiring a physical hardware programmer (like the CH341A) to flash the chip directly.






