Service manual

3.5 Power-Up Sequence
Figure 3–5 shows the power-up sequence for <REFERENCE>(xyp)
processors. All processors execute two phases of self-test,
and a boot processor is selected. The boot processor tests
VAXBI adapters, if present, and prints the self-test display.
Figure 3–5: <REFERENCE>(xyp) Power-Up Sequence, Part 1 of 2
Power-up or system reset (cold)
CPU 1
CPU 2
CPU n
Self-Test
Self-Test
Self-Test
. . .
Determine
Boot Processor
. . .
Determine
Boot Processor
Determine
Boot Processor
. . .
Determine
Boot Processor
. . .
Determine
Boot Processor
Determine
Boot Processor
Boot Processor prints
self-test results
Boot Processor tests
all memory modules
Boot Processor signals
all CPUs to start CPU/MEM tests
CPU 1
CPU/MEM tests
CPU 2
CPU/MEM tests
CPU n
CPU/MEM tests
A
msb-0047-89
1
2
3
4
5
NOTE: The second determination of the boot processor occurs
even if the original boot processor passes all memory tests.
3–12 VAX 6000 Models 300 and 400 Service Manual