If FB3 is using Atari 400/800/XL/XE/5200 hardware it need to have
-slots for both Atari 8-bit and 5200 carts
-built in tape and disk drives or have the conectors to plug them in
-an enternal hard drive with a built in OS with everything you need for a computer
-Keyboard
AND OF Course
-many many games built into the system.