BIOS image for a Lenovo desktop board marked CIH55C version 1.0, sized for an 8 MB flash chip, packed in a 2.86 MB RAR archive. CIH55C indicates an Intel H55-based board. A technician writes such a dump to the SPI chip with a programmer like CH341A when the original firmware is corrupted. Read and keep a backup of the existing chip first, confirm the board version printed on the PCB, and check that the chip on the board really is 8 MB, since a mismatched image will not fit.
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 →