Atari 2600 Field Service Manual

AUDIO TONES TEST
Purpose:
To
test the function of the audio tone generation and modulation
circuitry.
0 Format: The VCS unit should be in the initialized mode. Move the Right
Difficulty switch to the
"8" position.
The
test displays two alternating
patterns on the screen (as shown in Figure
3-12) while two alternating
tones are heard.
The tones change in sync with the screen. This test
pattern continues for one full cycle after the Right Difficulty switch has
been returned to the initialized position.
Figure
3-12. Audio Tone Test Screens
2600/2600A Domestic VCS

Atari 2600 Specifications

General

Manufacturer	Atari, Inc.
Release Date	September 11, 1977
CPU	MOS Technology 6507
CPU Speed	1.19 MHz
RAM	128 bytes
Graphics	Television Interface Adaptor (TIA)
Media	ROM cartridge
Successor	Atari 5200
Colors	128
Sound	2 channels
ROM	4 KB
Controller Input	Joystick