Atari 2600 Field Service Manual

If all data lines have signals, trace those signals to JZOG and the other chips. Table 4-1
illustrates which lines connect to which pins of 3200,
6532 and the TIA. The signal
present on each
data line of the microprocessor should also be present on each pin of
3200,
6532 and the TIA connected to that line.
If the same signal is not found, the
trace line and/or solder joints between the microprocessor and the dead pin(s) idare)
broken. Check the trace lines carefully to locate the break.
Address lines
@, 7-12
1 vldivision
Address Lines 1-6
1 v/division
Figure
4-1 1. STC Address Line Waveforms
I
I '
I
t
1
. , I!,
Data Lines 0,2, and 4
2v/division
2 ms./division
Data Lines 1,3,5-7
2v/division
2ms./division
Figure 4-12.
STC Data Line Waveforms
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