I have wrote to Insyde for investigating on the missing options in this BIOS. Insyde's techincal support have tells that each manufaturer customize the BIOS and I must to contact Acer.
I have wrote to the Acer support (the Italian support, because i'm italian) to take some information about the missing options in this BIOS. Acer tells me who the BIOS actually doesn't support AMD-V and if there will be new firmware there will be available on the Acer website.
I think it is important to reach a number of request. Also you must send a message to Acer for ask this feature. (I remember who Sony enabled the VT feature only after a consistent number of requests.)
now, some technical details
I have bought an Aspire One 725 with Windows 8 (AMD C-70), shipped with a 2.x version of the BIOS. I don't know if my machine it's able to boot with an 1.x version.
differently to stonefoz I have experienced that the AMD-V is disabled in both (UEFI/Legacy) boot modes. I have tested this feature on Linux.
I came from a self-made work (maybe, others has already reached my result)
I have downloaded the 2 bios available on acer website
I have found in the second archive (v1.05) the BIOS file named ZHGBIOS.FD
this file is named also in the technical service manual http://www.manualowl.com/m/Acer%20Computers/AO725/Manual/288275
Then I look it with an hexeditor, this file start with the sequence
78 16 00 00 2E
and has a lenght of 4194304 bytes (0x400000)
The last BIOS (v2.04) is not in the SFX archive, it's attached (without compression) in the executable. I found the same sequence (781600002E) at the position 0x1656FD of the ZHG204.EXE file.
The extracted file started and ended with the same bytes contained in ZHGBIOS.FD but they are equal only for the 46% of the content (I have compared the 2 files with a binary diff)
At this point I am unable to disassemble the BIOS, to locate the variables.
I have thought to try with a dump of the memory (on Linux) for extract more times the BIOS with some variables changed (and the locate the the variables area, with a comparation) but I don't find a Live distribution of Linux with /dev/mem unlocked
hints and tips are welcome