TM 5-6675-318-14
Table 2-8. TEST DESCRIPTION - Cont
Description
Test
A keyboard buffer swap error is
Keyboard Buffer Swap Test
indicated by a continuous audible tone
of two seconds on followed by two seconds
off. An error indicates a problem in
the keyboard interface board.
Performs a sequential summation of all
CPU PROM Checksum Test
data within locations 0000 to 00FF.
Includes locations 0005 and 0006 which
contain the known checksum value. A
comparison of the calculated total is
then made against the known value. An
error causes ERROR 97 to appear in the
upper left portion of the screen.
CPU PROM Checksum Test - Cont
No indication is given if the test
successfully passes.
In the event there is no CPU PROM, the
test checks the same locations in ROM
which become an overlay of locations
0000 to 00FF. ERROR 98 appears if an
error occurs.
Hardware Register Diagnostics
Verifies all working parts on the CPU
board by performing an extensive pattern
and sequence test. An error causes the
buzzer to sound continuously. Two short
bursts on followed by two seconds off.
The error indication can be terminated
only by pressing the keyboard RESET. An
error indicates a problem in the CPU
DATA or CPU CONTROL boards.
No indication is given if the test
CPU PROM Checksum Test - Cont
successfully passes.
Upon successful completion of hardware
register diagnostics, the following
message will be displayed on the screen.
keyboard, the diagnostic program will go
to the supervisor mode and display
on the screen, waiting test request
entry from the keyboard.
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