TECHNICAL OVERVIEW OF ATARI 400

Part of the system
Description
Processor 6502
Clock speed 1.79 MHz (NTSC) 1.77 MHz (PAL)
RAM 8 KB, later versions 16 Kb
ROM 10 KB
O.S. version(s) 400/800 O.S.
Cartridge port(s) 1 Adress space : 8 KB
Built-in software None
Controller port(s) 4
Function keys Reset, option, select, start
Parallel Bus Interface No
Cosmetics Brown 'box', membrane keyboard