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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-954PR-MEM (RISC Memory)
3
PR-MEM (RISC Memory)
The RISC Memory contains the DEFINITY software and firmware. The Processor
circuit pack is the most critical component in the system.
For testing purposes, the circuit pack is logically separated into PR-MAINT,
PROCR, and PR-MEM. This means that a memory problem requires that the
Processor be replaced. These systems contain two types of memory: Flash ROM
and DRAM. Flash ROM is memory that contains the boot image, part of the
low-level maintenance firmware, and PI firmware. This type of memory is not
erased during circuit pack resets. It can be reprogrammed via the
upgrade
software
command or a Reset System 4/5 using a software memory card.
One section of the Flash ROM (BOOTPROM) containing the system initialization
functions and the low-level diagnostic programs is programmed at the factory
and is not reprogrammed by the
upgrade software
command. DRAM is used for
software data storage, and it changes constantly. Both types of memory are
present on the Processor circuit pack. The diagnostics run appropriate tests on
both memories.
For all system activity, the Processor must be able to access the Memory. If the
Processor cannot do this, the system goes into SPE-down mode. In SPE-down
mode, fatal Memory errors may show up as Processor errors. This merely
indicates that the Processor and the Memory are very closely linked as a matter
of course.
If the initialization diagnostics fail, refer to the ‘‘Procedure for SPE-Down Mode’’
section in Chapter 1, ‘‘Maintenance for csi systems’’
.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run Full Name of MO
PR-MEM
1
1. The MO is ‘‘PR-MEM’’ because all of the Memory used by the Processor is on the
TN798 Processor circuit pack.
MAJOR test memory a lo c RISC Memory
PR-MEM
1
MINOR test memory a sh c RISC Memory