IBM 3278 Series User Manual

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Test Pattern Definition
CCCC identifies the control unit (3274 or 3276)
to which the 3278 is attached.
NN
is the port number (00 through 31).
?SEL PEN and SEL PEN are high-intensity,
protected, and selector-pen-detectable fields.
&SEL PEN and> SEL PEN are normal-
intensity, protected, and selector-pen-
detectable fields .
Non-display
field with NON preceding
normal-intensity and protected field DISPLA Y
INSERT. If blanking circuits on analog
card
fail, NON can be seen .
CK (and two null characters) is normal-intensity,
unprotected, and non-detectable field, followed
by another normal-intensity, unprotected, and
non-detectable
field containing cursor.
Test Pattern
(Line 1)
TEST:
CCCC NN
(Line 2)
?SEL PEN
(Line 3)
&SEL PEN
(Line 4)
DISPLAY
SEL PEN
>
SEL PEN
INSERTCK
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IBM 3278 Series Specifications

General

Brand	IBM
Model	3278 Series
Category	Desktop
Language	English