A 2 MB BIOS file labelled 4525A, in .BIN format, most likely tied to the 4525s model family, although the A suffix is not explained.

Duplicate of the 4525A firmware dump with a (2) suffix, 2 MB, raw binary. The name offers no extra detail, such as the board number, BIOS version or whether the ME…

A second 4525ac BIOS image, marked (2), 2 MB in raw binary form. As with the first file, the meaning of ac is unclear, and the name holds no board number, revision or…

Firmware dump for a 4525ac, 2 MB in .bin format. The ac suffix is not explained in the name and may mark a variant or a separate read, so treat it with caution.