[Request] Enable AHCI for ASUS RoG G703VI-XH74K

[okanisis]

First time poster and completely lost in the world of BIOS modding.

It looks really fun but feels beyond me...

I've got a laptop that has been a semi-paper weight with a number of NVME M.2 slots hard coded into Intel RST which is some kind of proprietary RAID - i'm sure you know about it.

I like Linux and use Arch Linux but can't get access to any drives I place into the M.2 slots and cannot find a setting in the BIOS to enable AHCI and expose them to the OS.

dmidecode shows me the following information:

Code:

dmidecode --type=0
# dmidecode 3.4
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
       Vendor: American Megatrends Inc.
       Version: G703VI.317
       Release Date: 10/28/2020
       Address: 0xF0000
       Runtime Size: 64 kB
       ROM Size: 16 MB
       Characteristics:
               PCI is supported
               BIOS is upgradeable
               BIOS shadowing is allowed
               Boot from CD is supported
               Selectable boot is supported
               BIOS ROM is socketed
               EDD is supported
               5.25"/1.2 MB floppy services are supported (int 13h)
               3.5"/720 kB floppy services are supported (int 13h)
               3.5"/2.88 MB floppy services are supported (int 13h)
               Print screen service is supported (int 5h)
               8042 keyboard services are supported (int 9h)
               Serial services are supported (int 14h)
               Printer services are supported (int 17h)
               ACPI is supported
               USB legacy is supported
               Smart battery is supported
               BIOS boot specification is supported
               Targeted content distribution is supported
               UEFI is supported
       BIOS Revision: 5.12

Generated a .rom but don't know if it's useful for anything with:

Code:

dd if=/dev/mem of=pcbios.rom bs=64k skip=15 count=1

I'd really like to enable AHCI mode and get those extra slots exposed to linux. If anyone can assist and needs any additional information, please ask - I'd be forever grateful.