Note Type
Artist’s Intent NoteNote
After Atari announced its intent to enter the home computer market in December 1978, the Atari 400 was presented at the Winter CES in January 1979 and shipped in November 1979.
Manufacturer Atari, Inc. (1979–1984)
Atari Corporation (1984–1992)
Type Home computer
Release date November 1979; 45 years ago
Introductory price Atari 400: US$550 (equivalent to $2,380 in 2024)
Discontinued January 1, 1992; 33 years ago
Units sold 4 million[citation needed]
Operating system Custom
CPU MOS Technology 6502B or
MOS Technology 6502 SALLY
@ 1.79 MHz (NTSC)
@ 1.77 MHz (PAL)
Graphics 384 pixels per TV line, 256 colors, 8 × sprites, raster interrupts
Sound 4 × oscillators with noise mixing or 2 × AM digital
Connectivity 4 × Atari joystick port
1 × Atari SIO
1 × Composite monitor
1 × ROM cartridge
Successor Atari STNote Type
Object Specific InformationNote
This Atari 400 was purchased from its original owner with a non-working keyboard and later restored to full functionality.
