Well, I am going by the DO-178C/ED-12C (Software) and DO-254/ED-80 (Hardware) from the RTCA and EUROCAE which I have conveniently next to me since I am currently planning a Software Assurance Level D system for use in the A320.
Also I am going by the 2 Portable IFE systems from our hardware partners that I have in my Lab to play around with. Portable IFE systems are completely battery powered and have no connection to the Aircraft. The only "certification" that you need is that you would need to demonstrate that this device does not need certification. Which in the case of the 2 devices I have right here is fairly simple thing.
Also I am going by the 2 Portable IFE systems from our hardware partners that I have in my Lab to play around with. Portable IFE systems are completely battery powered and have no connection to the Aircraft. The only "certification" that you need is that you would need to demonstrate that this device does not need certification. Which in the case of the 2 devices I have right here is fairly simple thing.