Firmware archive for the Acer Chromebook 871, built on Quanta board DA0ZARMBAG0, which carries the ZAR project code. Chromebooks run coreboot-based firmware, and write protection on the flash may need to be dealt with before reprogramming. Quanta uses DA-prefixed board codes. Save a full read of the original SPI chip with a programmer before writing anything, and confirm that the image size matches the flash capacity.
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 →