#Acer Aspire A315-32 Unlocking "CSM/Legacy Boot Mode Option" in UEFI BIOS (InsydeH20)

[^Ur1el^]

~!Greetings Dear Members and Bios-Mod_Administration Team!~

Let me sorry for disturbing in first..

Next..

If possible please, then I need some advices,tips,hints and help in case of unlocking "Legacy Boot Mode Hidden Option" in "Acer Aspire A315-32 ver.1.15" bios file...

I want to install older operating systemm, but without unlocking of legacy boot option its not possible..only UEFI mode is actually available in settings..

And I'm sure,there must be hidden option in BIOS that somehow possible to reveal to change UEFI mode to LEGACY mode...

...

Already Extracted (Section_PE32_image_DriverSampleDxe_SetupUtility_body.efi) from BIOS dump file,and its atached to my post with some of pictures about bios menu also!

With "IRFExtractor" extracted from (Section_PE32_image_DriverSampleDxe_SetupUtility_body.efi) the file String Packages...

Acer_Support_Site_Of_Product_FOR_BIOS_Update_Executable_If_Needed:
https://www.acer.com/ac/en/US/content/support-product/7517

What's next please?

...

Excuse Me For Grammatical Fouls!

Appreciate Any Crumbles of Tips,Hints and Help!

Regards!

Have God Blessed Nice Day!

God Blessing To All!

Bye!

[Dudu2002]

~!Greetings Dear Members and Bios-Mod_Administration Team!~

Let me sorry for disturbing in first..

Next..

If possible please, then I need some advices,tips,hints and help in case of unlocking "Legacy Boot Mode Hidden Option" in "Acer Aspire A315-32 ver.1.15" bios file...

I want to install older operating systemm, but without unlocking of legacy boot option its not possible..only UEFI mode is actually available in settings..

And I'm sure,there must be hidden option in BIOS that somehow possible to reveal to change UEFI mode to LEGACY mode...

...

Already Extracted (Section_PE32_image_DriverSampleDxe_SetupUtility_body.efi) from BIOS dump file,and its atached to my post with some of pictures about bios menu also!

With "IRFExtractor" extracted from (Section_PE32_image_DriverSampleDxe_SetupUtility_body.efi) the file String Packages...

Acer_Support_Site_Of_Product_FOR_BIOS_Update_Executable_If_Needed:
https://www.acer.com/ac/en/US/content/support-product/7517

What's next please?

...

Excuse Me For Grammatical Fouls!

Appreciate Any Crumbles of Tips,Hints and Help!

Regards!

Have God Blessed Nice Day!

God Blessing To All!

Bye!

Hi
Your bios is rewrite protected
You need a SPI-programmer+SOIC8 clip only

[^Ur1el^]

~!Greetings Dear Members and Bios-Mods_Administration Team!~

Thank You So Much For Fast Reaction,Answer!

No problem at all desolderin the eeprom, or writing/reading eeprom with SOIC8_Clip!

Thanks For The God I have both accessories at my hand..External chip programmer with ZIF+SOIC8_socket and CH341A+SOIC8_Clip also..

...

The problem is that this type of WINBOND Chipset is 1,8V based..and the cheap Chinese Chip Programmer With SOIC8_Clip CH341A is cause over-voltage came from wrong design..so i need to de-solder eeprom and read it in external programmer,i think that is the right way..but it's OK,if not happen anything wrong in soldering procedure..

...

"I think" I need help only in disassembling process..because I'm stuck with that..I don't know where I start with it..analyzed donovan older posts on his blog about bios unlock procedure,but i feel and i think its outdated howto and there is a bit more tricky or complex this procedure..


http://web.archive.org/web/2016091621281...arted.html

http://web.archive.org/web/2016091621434...tings.html

http://web.archive.org/web/2016101122171...-tabs.html

...

Attached V1.15 Extracted BIOS Binary from update executable just for analyzing and disassembling purposes..(isflash.zip)

Attached datasheet also about bios chip if somebody need it in future..(Winbond_W25Q64FW_Datasheet.zip)

Attached pictures about chip and motherboard for helping purpose of others if it needed in future...(EEPROM.jpg / MOTHERBOARD1.jpg / MOTHERBOARD2.jpg)

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Attached Windows OS Based BIOS/UEFI Dumper Tool, only for this notebook model, if somebody need it in future to make/read bios dump without soldering..(Local_BIOS_Dumper_Win_x64.zip)-(!!!ONLY_FOR_READING_BIOS_CHIP_CONTENT..DO_NOT_USE_IT_FOR_WRITING...!!!USE_IT_FOR_YOUR_OWN_RISK!!!)-(!!!TESTED_WORKING_FOR_ME!!!)...

Local_BIOS_Dumper_Win_x64.zip
MD5_Checksum: B6615C42B2715C9D986D3281775BE58F
https://virusscan.jotti.org/en-US/filesc...u73o6x3oqd
https://www.virustotal.com/gui/file/b756...62acab690c

https://www.sendspace.com/file/6oj606
https://www.mediafire.com/file/0imuizo1g...4.zip/file
https://www114.zippyshare.com/v/snCNl7vP/file.html

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UEFI_Tool_For_Extracting_BIN...
(GUID FE3542FE-C1D3-4EF8-657C-8048606FF670 = Section_PE32_image_DriverSampleDxe_SetupUtility_body.efi)
https://github.com/LongSoft/UEFITool/releases

...

LinuxOS_Internal_Dump_Reading_TOOL:
(!!!USE_IT_FOR_YOUR_OWN_RISK_PERSONALLY_NOT_TESTED!!!)
https://www.flashrom.org/Flashrom
https://wiki.archlinux.org/index.php/Fla...from_Linux

...

Excuse Me For Grammatical Fouls!

Appreciate Any Crumbles of Tips,Hints and Help!

Regards!

Have God Blessed Nice Day!

God Blessing To All!

Bye!