5-4
98750
Diagnostics
The
character
set
is
repeated
five times. This test exercises
all
the CRT features.
If
the pattern
is
deformed,
the
A
73
assembly
may
be
defective.
Press
o:J
;
the
CRT displays
the
optional characters
if
the option ROM
is
installed. When the
option
ROM
is
not
installed the CRT shows:
-
111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111
'1111111111111111111111111111111111111111111111111111111111011111111111111111.
111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111
Press
CO;
all the CRT display features
can
now be checked. The CRT displays:
PRESS
CONTINUE
Press
(CONTINUE)
15
times, noting
each
time the feature being displayed. The features are shown
in
the
folloWing order.
inverse video
normal blinking video
normal video underlined
normal video with cursor
blinking inverse video
underlined inverse video
inverse video with cursor
blinking inverse video underlined
inverse video with underline
and
cursor
blinking inverse video with cursor
blinking inverse video with underline
and
cursor
blinking video
and
underline
blinking video
and and
cursor
blinkinq video cursor
and
underline
normal video cursor
and
underline
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