Atari 400

Released      1979


Miscellaneous      Sound chip POKEY ("POtentiometer and KEYboard Integrated Circuit"); graphics chip ANTIC ("Alpha Numeric Television Interface Controller") and CTIA ("Colour? Television Interface Adapter").

For NTSC the mainboard is equipped with a 3.579573 MHz crystal which drives the CPU with 1.7897865 MHz. PAL machines carry a 3.546894 MHz crystal which is devided to 1,773447 MHz before applied as CPU clock.

* Thanks to Andreas Rudolph for the ATARI 400 (PAL). *


Technical Data      CPU: R6502A (2 Mhz)
Clock: 1,79 Mhz
RAM: 8k, 16k, 48k
ROM: 10k OS, no BASIC
Operating system: Proprietary
Text mode: 40 x 24, 2 colours; 40 x 24, 5; 20 x 12, 5; 40 x 24 (monochrom); 20 x 24, 5; 20 x 12, 5
Graphics mode: 40 x 24, 4 colours; 80 x 48, 2; 80 x 48, 4; 160 x 96, 2; 160 x 96, 4; 320 x 192, 2; 80 x 192, 16 (shades only); 80 x 192, 9; 80 x 192, 16 (hues only); 160 x 192, 2; 160 x 192, 4
Colours: 256 colours (16 different colours, each with 16 shades)
Sound: 4 channels, mono, via monitor; channel 5 via build-in speaker


Stuff I have      400 (16k, NTSC) (Computer)
400 (16k, PAL) (Computer)
Atari 400 (48k, PAL) (Computer)


Stuff I need      Any kind of software (Cartridge Software)
Any kind of software (Disk Software)
Any kind of hardware extension (Extension Hardware)
Touch pad, interfaces, ... (Extension Hardware)
Documentation (Literature)
Any kind of peripherals (Other Peripherals)


Picture      pictures of 400




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this page was updated: 01.01.02 16:53:19
holger@zahnleiter.org