Atari 2600 Field Service Manual

If the stick is gushed forward and to the risht at the same time (tha: is, in a
northeastern direction), both the forward and rignt keypad close si~ultaneously, which
causes the
6532 to see two switch c!osures happening at once. The result is that the
object being controlled on the screen moves diagonally. With the four keypads, 8
different directions can be attained.
The pushbutton determines whether the keypad
beneath it is either open or closed. See Figure 7-2 for Joystick Schematics.
Figure
7-2. Joystick Schematic
2600/2600h 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