[REQUEST] HP Compaq 6720s WiFi whitelist removal

[pokazene_maslo]

Hi. Could you please remove whitelist on this bios for HP Compaq 6720s: https://ftp.hp.com/pub/softpaq/sp41501-4...p41876.exe
mine is the sp41876u
Thanks!

[Maxinator500]

Hi. Could you please remove whitelist on this bios for HP Compaq 6720s

Hi!
Choose one of the following, based on your device configuration:
sp41877_SLIC21_SLPon_no_whitelist_ATI.zip
sp41877_SLIC21_SLPon_no_whitelist_INTEL.zip

Source of mods

[pokazene_maslo]

Thank you! You are quick. Can you please point me to some guide how to backup the original BIOS? Then I'll try and report back results.

[Maxinator500]

Can you please point me to some guide how to backup the original BIOS?

Backup for the purpose of reverting changes in future? I do not understand why you might need a backup. BIOS image files from installation package are can be used for crisis recovery. This is in case you prefer HW programmer.

[pokazene_maslo]

Can you please point me to some guide how to backup the original BIOS?

Backup for the purpose of reverting changes in future? I do not understand why you might need a backup. BIOS image files from installation package are can be used for crisis recovery. This is in case you prefer HW programmer.

If I'm not mistaken in bios are stored windows license key, MAC address for onboard ETH adapter, etc. I just wanted to have backup just in case something goes wrong. Anyway I flashed the BIOS you provided and it's working great. I replaced the original Broadcom BCM 94311MCGHP3 (b/g) with Atheros AR5B91 (b/g/n) and wifi speed doubled as result. Can you do any other updates in the BIOS? Like for example newer video BIOS, newer option ROMs, newer microcode?
Thanks a lot!

[Maxinator500]

Can you do any other updates in the BIOS? Like for example newer video BIOS, newer option ROMs, newer microcode?

Not for such old bios, because to remove WL we manipulate additiv checksumm by changing lines of code in the BIOS image that are definitely not used e.g. do not affect performance. Since the WL patch is quite small, the checksumm save operations can be performed successfully. But when it comes to hundreds of bytes, we simply cannot find enough other bytes (lines of text for example) allowed to change. More about it here.
If you can provide a better method, let me know.