This also means looking into alternative boards and formfactors, as the zero is limited in N64 and PSX performance, as it allows for future expansion/upgradability.
The raspi3 is the current popular choice if you want to play these consoles at the cost of some hefty modding.
Let me present a new board which has been introduced 2 weeks ago; the NanoPi Neo Air;

The board is 40 x 40mm (vs 30 x 65mm for the zero) and features the following;
- - Allwinner H3 A7 quadcore @ 1,2 GHz
- 512MB DDR3
- 8GB onboard storage (!)
- Broadcom AP6212 Bluetooth 4.0
- Broadcom AP6212 Wifi b/g/n
The one and only thing I haven't been able is to find what pin does composite video, the PDF manual lists this;
Anyway it can be ordered from here; http://www.friendlyarm.com/index.php?ro ... uct_id=151Two interfaces may be active in parallel
- HDMI V1.4 output with HDCP1.2, up to 4K@30fps
- TV CVBS output <- this is the composite video signal
So what do you guys think, is this a winner or what? Remember; it's so small it even fits inside a Gameboy cartridge if you want to go that way(!).