Control Data Corporation CDC 790ICEM Owner's Manual page 17

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20) Type 6 and then Shift+CR/DEL.
You should see V's of white, black, r.ed, green, yellow, daLk
blue, magenta (purplish red), and light blue moving on the
color display screen. If you see the moving V's as
described, press any key to stop the movement and continue
with the next step. If colors are missing from the pattern,
start again at step 15, but at step 17, when you see:
Memory Mask (enter 8 HEX digits, 0 enables writing)
=
appear on the text display screen. Type fffffffOO (note this
is 6 f's and 2 zeros, not 6 f's and 2 letter O's) and then
Shift+CR/DEL. Then, before going to step 21, repeat step 20
(this step) so you can see the various colors displayed.
21) When
21)
TEST
=
appears on the screen, type 1 and do Shift+CR/DEL
and
***
CONVERGENCE TEST
***
appears on the text display screen. On the color display you
should see a grid pattern with some small, barely visible,
dots in the middle of each square. Each of these dots is
called a "pixel." The screen of the color display has
thousands of pixels. You can see a pixel when it is lighted
by a beam of electrons from within the color display tube.
Thousands of pixels may be lighted to show a drawing or
picture an the color monitor. The grid pattern you see is
made up of hundreds of lighted pixels.
Press any key to end this test. You can. end most of the
tests by pressing any key on the keyboard and the test menu
followed by TEST
=
will appear on the text display so you can
enter the number of the next test. Some tests take awhile to
run, so the test may not end immediately.
For some tests, a "Test Passed," or "Test Done," message
appears on the text disp~ay screen. If you cancel a test
before the test completes, a "Test Aborted" message appears.
62950150
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