Service manual

1
The second line in the self-test display indicates the type (TYP) of
module at each <REFERENCE>(XMI) node. Processors are type P. In
this example, processors are at nodes 1, 2, 3, and 4.
2
The third line shows self-test fail status (STF), which are the results of
on-board self-test. Possible values for processors are:
+ (pass)
– (fail)
All processors passed self-test in this example.
3
The BPD line indicates boot processor determination. When the system
completes on-board self-test, the processor with the lowest ID number
that passes self-test and is eligible (designated by an E on the BPD
line) is selected as boot processor — in this example, the processor at
node 1.
The results on the BPD line indicate:
• B — The boot processor
• E — Processors eligible to become the boot processor
• D — Processors ineligible to become the boot processor
4
During extended testing (ETF) all processors run a test, which includes
reading and writing memory and using the cache. On line ETF, results
are reported for each processor in the same way as on line STF—a
plus sign indicates that extended self-test passed and a minus sign that
extended test failed. In this example, the processor at node 1 (originally
selected boot processor) failed the CPU/memory extended test.
5
Another BPD line is displayed, because it is possible for a different
CPU to be designated boot processor before the system actually boots.
This occurs in this example, because the processor at node 1 failed
the extended test. The lowest-numbered processor that passed both
tests is the processor at node 2. However, a previous SET CPU/
NOPRIMARY command has made this processor ineligible to be boot
processor (indicated by the designation D on the BPD line). Therefore,
the processor at node 3 is designated boot processor.
6
The bottom line of the self-test display shows the ROM and EEPROM
version numbers and the system serial number.
<REFERENCE>(xyp) Scalar Processor 3–17