Test - IBM 3279 2A Maintenance Information

6. If the test request was to a different display, a
suffix is appended to the request message.
Suffix Meaning
+
Successful
-
Control unit or
coaxial device
cable failure
0 Display
powered off
For example:
o
I
L
failed
~test
Control Unit Identifier Port
(I = IDPA)
TEST:
nnnn;pp
?SEL PEN SEL PEN
I/,
&SEL
P'~I
>SEL PEN
/
/ DISPLAj INSERT
C\
-~
White
White Red Green
IntensIfIed Intensified Non protected
t
Attributes
Protected Non protected f only
NON precedes DISPLAY but is a
non display field that is visible
only if the blanking fails.
All other fields in the test patterns are
blue and protected. See Figure 6-17 for
attribute bits.
Figure 2-4. Online Test 0 Pattern
3279 MIM
Chapter 2. Maintenance Aids 2-7