Self Test; Manually Initiated Self Test; Remotely Initiated Self Test; Idle Self Test - HP 30240A Installation And Service Manual

Self Test
The LANIC has a selftest feature that performs tests of internal circuitry and
provides a status code indicating the result. Before the execlltion of each selftest
step. the step number is written to the STR and the VISIND registers. When the
self test is complete. the LANIC interrupts the host and enters the KERNEL
state where it is ready to accept interactive commands.
Manually Initiated Self Test
Self test is manually initiated by the selftest switch on the LANIC card. The
location of this switch is shown in Figure 2-1 in Chapter 2.
Remotely Initiated Self Test
Self test is remotely initiated by the backplane command WREG 15. or by the
backplane signals PON or SRST (Power On or System Reset).
Idle Self Test
During operation of the LANIC. various tests of hardware are performed when
no other tasks are being processed. If a hardware failure is detected, an error
code is placed into the STR register and the host interrupt request is set.
Visual Indicators
Fifteen light-emitting diodes (LEDs) are used on the LANIC card to indicate
LANIC activity. The locations of the LEDs are shown in Figure 2-1 in Chapter
2. Eight of the LEDs are used for self test results and are described in Chapter 4;
the remaining seven LEDs are used for indicating activity on the LANIC card
and the LAN network. These LEDs are described in the paragraph "LEDs", later
in this chapter.
Principles of Operation
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