GSi TYMPSTAR 1, Service Manual

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Calibration
Pressing the START softkey initiates a test sequence that evaluates an incrementing
series of memory locations by writing to and reading from each location in the series.
The test continues looping through memory addresses until the test fails, or the STOP
softkey is pressed. If the test fails, the address, expected contents, and actual
contents of the problem memory location are displayed.
Pressing the STOP softkey halts the test. Pressing the EXIT softkey displays the
Miscellaneous Diagnostic menu.
SOFTWARE TIMER Pressing the SOFTWARE TIMER softkey displays the software timer test results
and starts an automatic timer test.
The software timer test confirms correct processor instruction execution by using
the processor clock and a software instruction loop to count to approximately 10
seconds.
Upon conclusion of the test, the timer value is compared to the actual elapsed time,
and a pass/fail indication is displayed.
Pressing the EXIT softkey displays the Miscellaneous Diagnostic menu.
GSI TympStar Version 1 and Version 2 Service Manual 4 - 23