Firmware archive labelled CX 23200 Y116C at revision 6.0, about 2.8 MB, with no brand stated. The tokens look like a board or model code, but the name does not say which device they belong to, so confirm against the markings on your PCB. Check the image inside against the capacity of the SPI flash chip, since an image of the wrong size will not fit. Always read and save the original chip before writing with a programmer. A matching revision number matters as much as the model code.
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 .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 →