Combined BIOS package for the LG-80 and LG-81 boards, listed under the LG brand, in a 335 KB ZIP archive. One archive for two models suggests shared firmware, though any notes inside should be read to confirm which image fits which board. No version number is given. Verify the model code silkscreened on the motherboard, check the unpacked image against the chip capacity, and back up the current BIOS before writing with the flash utility or an external EEPROM programmer.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →