Atari 2600 Field Service Manual

RAM mT
Purpose: To test the 6532 RAM chi0 for proper operation.
Format: On power-up the television displays diagonal lines of some type if
the RAM is defective. See Figure 3-7 for examples of screens indicating 2
defective RAM.
NOTE: The absence of defective patterns is no assurance that the entire
chi. is sound, only the RAM. The operation of the I/O and Timer functions
is not verified by this test.
Figure 3-7. Defective RAM Patterns
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