Atari SUPER SPRINT - Scrolling Playfleld Test; Motion Object Test; Motion Object Height Test; Figure 3-12 Scrolling Playfield Test

Super Sprint
Self-Test
The displayed alphanumeric characters are in four rows,
with the first row white, the second row red, the third
row yellow, and the fourth row green. If not, then there
may be a problem with the color palette select circuits.
Press the red start button to obtain the next screen.
Scrolling Playfleld Test
The Scrolling Playfield Test screen is shown in Figure
3-12. This screen indicates the condition of the playfield
ROM, playfield display circuits, and playfield color
palettes.
The display in Figure 3-12 shows a racetrack. Turn the
blue car (left) steering wheel to control forward and back¬
ward scrolling. Turn the red car (center) steering wheel to
control the right and left scrolling. Note that the display
scrolls correspondingly.
Press the red start button to obtain the next screen.
Motion Object Test
The first Motion Object Test screen is shown in Figure
3-13. This test indicates the motion object horizontal and
vertical display locations, motion-object color palettes,
and the motion/playfield prioritizing logic circuit.
The Motion Object Test screen should show 39 motion
objects and four colored boxes (numbered 0 through 3).
The left two boxes (0 and 1) should be red, and the right
two boxes (2 and 3) should be green. The motion objects
should be colored (from left to right) blue, light blue, pur¬
ple, and white. Any error in color can indicate a problem
with the color palette select circuits.
Turn the blue car steering wheel to control forward and
backward scrolling, and the red car steering wheel to con¬
trol right and left scrolling. Note that the currently dis¬
played motion object moves correspondingly. Move the
motion object across the four colored boxes. Note that
the motion object moves behind the red boxes and in
Figure 3-12 Scrolling Playfield Test
Figure 3-13 Motion Object Test
Figure 3-14 Motion Object Height Test
front of the green boxes. Press the blue car button to se¬
lect the next motion object and repeat the preceding pro¬
cedure. This procedure checks the prioritizing logic
circuitry.
Press the red start button to obtain the next screen.
Motion Object Height Test
The Motion Object Height Test screen is shown in Figure
3-14. This test indicates the motion object height circuit
and the horizontal load disable circuit.
Each successive column of motion objects should be 16
pixels taller than the last. The top 16 pixels of each col¬
umn should be the same, Each column should add a new
16 x 16 pixel stamp picture to the bottom and slide the
previous one up by 16 pixels. Turn the blue car and the
red car steering wheels to move the entire picture around
on the screen. Press the blue car button to obtain a new
set of motion objects.
Press the red start button to obtain the next screen.
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