Dell desktop BIOS archive covering the Inspiron 660s and the Vostro 270s, two slim towers that the name groups under a single firmware set. Size is 4.63 MB in RAR form, and no board number, version or flash chip capacity is stated. Open the archive to see whether it holds a raw SPI dump or a vendor updater. A raw image is programmed directly onto the motherboard flash with a programmer when the system will not boot. Verify that the image size equals the chip capacity, and store a copy of the current contents before flashing.
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 →