Write 0x3C50 to PHY Register 0x72
Read PHY Register 0x73 and write that value to SHM offset 0x680
Read PHY Register 0x73 and write that value to SHM offset 0x682
Read PHY Register 0x73 and write that value to SHM offset 0x684
Read PHY Register 0x73 and write that value to SHM offset 0x686