RAR archive labelled z400 containing BIOS or firmware files, most likely for a Z400 series machine, though no brand or board number is given. At 3.17 MB compressed, the archive may hold a single image or several dumps such as main BIOS and EC; extract it with WinRAR or 7-Zip to inspect the contents. Match each file size to the flash chip on your board, confirm the model and board revision, and back up the original chip before programming any image with a hardware 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 @biosbigarchives. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →