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SELF-TEST
The terminal tests itself. Should you suspect a malfunc-
tion while operating the terminal, you can perform the
SELF-TEST function to checkout the terminal. Also, after
installing any accessory, the terminal's self-test function
should be performed to insure that the terminal is func-
tioning properly. There are three types of self-test, each
testing a specific function of the terminal.
BASIC SELF-TEST
Pressing
~
, checks out the terminal, except for the
cartridge tape units (if installed) and the data communica-
tions. The following is performed when the c;;l key is
pressed (also see the flowchart in figure 7-32):
•
The light-emitting diodes (indicators) on the keyboard
are turned on briefly as an indication that the power
supply and microprocessor board are functioning.
•
A checksum test is done on the read-only memory
(ROM). This verifies that the firmware is working
properly. An error here causes a ROM ERROR mes-
sage to be displayed. (See flowchart, figure 7-32.)
•
A checkerboard test is performed on the random ac-
cess memory. An error here causes a RAM ERROR
message to be displayed. (See flowchart, figure 7-32.)
•
The bell is beeped indicating success up to this point.
@ABC
DEFGHIJK
LMHOPGRS
TUVWXYZ[
\]A
@A~~I~~
8:08070 0130080
Installation
•
The entire character set contained in the terminal is
displayed.
•
A line of characters, @ABCDEFGHIJKLMNO, is
displayed. If the Display Enhancement option is in-
stalled, then Underline, Half-Bright, and Blinking
will be displayed with Inverse Video in all of the
possible Display Enhancement combinations by this
line of characters.
•
The 14 bytes of status information are displayed. (See
Section VI "Status" for an explanation of the status
bytes.)
Generally, if the terminal beeps and the display shows a
pattern similar to those shown in figure 7-31 then the
terminal is functioning properly (only those character sets
actually present in the terminal will be displayed in the
test pattern and consequently the actual test pattern dis-
played will be dependent on which features are present in
each terminal).
~
must be pressed to resume operation if any error
~~~~~red.
However, the station's operation will not be reli-
able if the Self-Test failed.
NOTE
The test pattern cannot be recorded be-
cause of imbedded Record Separators
(RS).
!II,
$llr'()*+
,-./0123
456789:;
<a>?
A.
Test Pattern for the standard terminal.
JI§
V±l(r+~nr
t=IZ0123
ItS'711'QI\
.JtI
'aa'/l
_~a>'n"ex
W)JvpTT8a
'~~&X"tt
-+T"'!'aa'/l
_fd>'n"ex
W)JvpTT8a
,E~&X"tf
-+T"'!
~\~fi:
rytQ\O\'\-~'
FF'\~
Il D1l\C\
D4'\c"Fw.c;.~\tt
F5\\~
!II,
$%Ir'()*+
,-./0123
456789: ;
<=>?
@ABC
DEFGHIJK
LMHOPGRS
TUVWXYZ[
\]A
-
'abc
defghijk
Imnopqr5
tuv""xyz{
;
}
....
8A~~IBM!illJ
8:08070 0130080
B.
Test Pattern for terminals containing Display Enhance-
ments, 128 Roman Character Set, Math Symbol Set,
and Line Drawing Set.
Figure 7-31. Basic Self-Test Patterns (HP 2645A)
7-39
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