The Atari 7800 had simple digital joysticks (which were very poor) but was almost fully
backward-compatible with the Atari 2600, the first console to have backward compatibility
without the use of additional modules. Enhanced games included higher resolution graphics.

Technical Specifications
Processor(s): Custom 6502c @ 1.79Mhz
ROM: 4Kb
RAM: 4Kb
Display options: Television
Graphics capability: 320 x 200 pixels
Maximum number of colours: 256
Sound capability: TIA Custom Sound (2 Channels)
Ports: Joystick/Paddles/Keypad, Power and Cartridge input
Storage: Cartridge
Power: External PSU – 9v DC (15 Watt)
Price: £99
Software: Only 60 official 7800 titles were released originally but compatible with nearly all Atari 2600 cartridges.

NOTES:- Please turn off system before removing/replacing cartridge