Atari 8-bit computer peripherals

Atari 8-bit computer peripherals include floppy drives, printers, modems, and video game controllers for Atari's 8-bit computer family, which includes the 400/800, XL, XE, and XEGS.
Because the Atari 400/800 8-bit computers were bundled with an RF modulator, stringent FCC regulations limiting radio emissions applied. Consequently, the Atari 400/800 systems internal construction use large metal frames as Faraday cages to prevent emissions. This prevents the use of internal cards to add connections for peripherals.
To permit easy expansion, Atari developed the SIO (Serial Input/Output) bus. This bus daisy chains together all Atari peripherals into a single string. The Atari computer family was designed to be easy for novice users to expand, with one universal connector plug. Peripherals have their own IDs and can deliver downloadable drivers to the computer during the boot process. However, the additional electronics in these "intelligent" peripherals made them cost more than the "dumb" devices for other systems.
List of peripherals.
The names and the styling of Atari's 8-bit peripherals generally match the contemporary computer family. Thus, they can be divided into one of three groups: the 400/800 era (4xx/8xx), the XL era (10xx), and the XE era (beginning with 'X'). The XL-era naming reflects Atari's original intention to launch an "Atari 1000" line. These are superficial issues and the majority of peripherals are compatible with any 8-bit Atari computer.
Atari failed to release a large selection of machines and peripherals that were otherwise completed.