Computer Closet Collection

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Atari 400

See below for specifications and information on this system.

Specifications and information

Key Dates: Announced December 1978
Ships October 1979
CPU: 6502, 1.79 MHz
Memory: 8K
Operating System: BASIC in ROM (10K ROM pack + BASIC cartridge)
Atari DOS on diskette
Input/Output: 4 joystick ports, Atari cable bus
Bus: One cartridge slot
Atari daisy-chain cable bus, connects floppy drives, cassette drive, and Atari 850 I/O interface, which includes serial and parallel ports.
Other Items in Collection: Full documentation, Atari DOS 2.5 & 3.0, various cartridges & games on diskette

The Atari 400 and 800 were launched simultaneously, although the 800 was not available in the retail channel for a few months. The membrane keyboard prohibited touch typing and limited the 400's applications to primarily games.

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