Audio Generator And Amplifier

The audio generator produces the crowd whistle and ball sounds. The crowd sound is the result of the gated random noise generator composed of shift registers A8 and B8. The NOISE output of this generator is gated on each time the KICKER signal goes low. The KICKER signal is developed by the microprocessor via LATCH F8. The crowd sound volume is automatically controlled by the data bus bits DBUS 0-5. The noise (un-filtered crowd sound) is then filtered by the active bandpass filter circuit...

Plater Control Panel

The Atari Football game consists of two player control panels (a control panel is illustrated in Figure 2-1). These two control panels are operated simultaneously by opponents. Each control panel is capable of operating either the offense or the defense, depending on game conditions. The player control panel consists of a trackball, a Play Select board and a dual function LED pushbutton (its primary function is as a Play Select switch and secondary function as a Press-to-Pass switch). When the...

Illustrations

Figure 2-6 The Keeper, An Offensive Running Play 2-7 Figure 2- 7 The Bomb, An Offensive Passing Play 2-8 Figure 2-8 The Down and Out, An Offensive Passing Play 2-8 Figure 2-9 The Sweep, A Figure 2-10 The Keeper, A Figure 2-11 The Bomb, A Figure 2-12 The Down and Out, A Figure 2-13 Figure 2-14 Out of Figure 2-15 Tackled Figure 2-16 Figure 2-17 Figure 2-18 Down Marker Figure 3-1 Football Game Block Diagram 3-2 Figure 3-3 (On-Board) Power Supply Schematic Diagram 3-5 Figure 3-4 Power Supply...

Motion Object Generator

The motion object generator produces characters such as the football and the Xs and Os. These motion objects are generated by the same circuitry found in the scrollfield generator (see Figure 3-15), while the actual graphics are permanently stored in PROMs C5 and D5 (see Figure 3-17). This circuitry is used for motion objects when 256H is low, and for scrollfield when 256H is high. The RAWVID signal from the parallel to serial shift register A6 is connected to OR gate K3. This gate ORs the raw...