My HP came with a Broadcom Wifi adapter, but i want to switch it to Atheros . I got a few PCIe 9285 adapters. They are identical except for the subsy stem ID:
The HP branded adapter did not work at first, but works after re-flashing i t. The non-HP adapter works on another labtop but lockup the bios on the H P, with non-supported device message.
I am trying to re-flash the non-HP adapter with the HP image. I can change most of the eeprom data except for 3 bytes. Unfortunately, two of them ar e the subsystem ID that i need to change. No matter what i do, flashing wi th HP image and/or random file, i can not change the subsystem ID.
Could they be write protecting few bytes within the eeprom? Are there some other GPIO and/or register that need to be changed before setting the subs ystem ID?