Rom Diagnostic - Nortel DMS 100 Series Maintenance Manual

8-28 RSC-M trouble isolation and correction
Resets and time stamps
The history database stores five time stamps for each peripheral:
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Each unit has short term counters reset to zero internally when the unit
successfully gains activity. This gain of activity can occur as a result of an RTS
or SWACT command. Long term counters are reset for each node from an
XPM posted at the MAP terminal. When long term counters are reset, the
system generates a log. The log contains a summary of the data collected for
that node before the reset.
A new software application resets all diagnostic history data. The diagnostic
resets short and long term failure counts. In this condition, the system does not
generate a log with long term failure counts.

ROM diagnostic

The read-only memory (ROM) diagnostic detects problems in the processor
and memory cards. The ROM diagnostic activates when the XPM is in the
who-am-I (WAI) state.
Note: The unit must be reloaded after this diagnostic runs.
The diagnostic tests the following memory card circuits:
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The diagnostic test the following processor card circuits:
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297-8223-550 Standard 04.02 November 2000
for the node
— the time when long term failure counters are last reset
for unit 0
— the time when short term failure counters for unit 0 are last reset
— the time when the last diagnostic failure occurred on unit 0
for unit 1
— the time when short term failure counters for unit 1 are last reset
— the time when the last diagnostic failure occurred on unit 1
memory circuitry
parity circuitry
holding registers
memory mapper unit
universal synchronous/asynchronous receive/transmit (USART) integrated
circuits
programmable timers