Atari XL
The Atari XL was a series of 8-bit home computers introduced in 1983. They were an improved version of the Atari 800 and Atari 400 computers from 1979, which formed part of the Atari 8-Bit Family
Their main CPU was a MOS Technology 6502. There were 3 versions- the 1200XL, the 600XL and the 800XL. All three used a normal television as a display.
Atari XL Media
Atari 400 (1979) has a membrane keyboard and a door covering the single cartridge slot.