AHCI menu added but selecting does not enable

[chriz74]

Sorry if I post in the AMI forum but I need some expert view on this situation.
The bios I am working on is not AMI bu Phoenix, I was able to add a "PATA+SATA id control" menu to the bios.
This menu let's you select the PATA SATA pair for chipset sis 968, no matter what one selects, the bios reverts to 5513+1183 after saving and exiting, this means IDE + SATA in ide emulation mode.
AFAIK the 968 chipset is perfectly able of RAID and AHCI however maybe this menu I added doesn't really change anything in the bios.
I was wondering maybe there's a way to set the correct pair by hardcoding it in the bios with an hex editor, some bits maybe, hence forcing the IDE+SATA AHCI or IDE+SATA RAID mode.
Does anyone have an idea?

Here's the thread https://www.bios-mods.com/forum/Thread-R...-ahci-bios

and screenshots of the bios with newly inserted menu





modded bios:

https://www.dropbox.com/s/me3t7yy0uyqwpi...M.zip?dl=0