An update to the Ethereum network has taken place. Two weeks before the event, the complexity of cryptocurrency mining has tripled. This is the confidence of large miners, who upgraded their equipment from ethereum to ethereum Classic.
Innosilicon has released a firmware update for the Innosilicon A11 Pro

Innosilicon firmware download link
https://www.innosilicon.com/html/support_en/download.html
The company's management said:
"Based on the Ethereum POW to POS consensus mechanism (algorithm), at the request of our customers, we have developed the A11 server ETC firmware, which has been tested and publicly posted here for customer convenience."
Bitmain has released a firmware update for Antminer E9
Link to download the official firmware link https://m.bitmain.com/support/download
Supports Antpool, Poolin and F2pool.