Atari 800 Service Manual

Figure 5-5. Color Bar Test Screen Display
• Set System Power ON/OFF switch to OFF.
• Open Cartridge Door
• Rotate Cartridge door clamps to the outside
• Raise Cartridge Door assembly 1/4 inch, then pull towards you and
lift off
• Use small flat-blade screwdriver to depress Interlock switch
• Set System Power ON/OFF switch to ON
• Initialize Color Bar test to display screen format
3. Turn the Console 180 degrees to provide access to the back of the
Console.
4. Refer to Figure 5-6 for the 400 ConsoleT and to Figure 5-7 for the
800 Console when performing the following steps.
• Insert a small (No. 1) flat-blade screwdriver or an electronic
adjustment tool into the plastic grating of the 400 Console, or
into the access hole of the 800 Consolet until it conta~ts the
variable resistor.
5-12 System Service Manual

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS