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 comp onent in the system.
For testing purposes, the c ircuit pack is log ically separated into PR-MAINT,
PROCR, and PR-MEM. This means that a memory problem req uires 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 m emory is not
erased during c ircuit pack resets. It c an be reprogrammed v ia the upgrade
software command or a Reset System 4/5 using a software memor y card.
One section of the Flash ROM (BOOTPROM) containing the system initialization
functions and the low-level d iagnostic prog rams is programmed at the f actory
and is not reprogrammed by the upgrade software command. DRAM is used f or
software data storage, and it c hanges constantly. Both types of memor y are
present on the Processor circuit p ack. The diagnostics ru n appropriate tests on
both memories.
For all system activity, the Processor must be able to acc ess the Memory. If the
Proce ssor c anno t do this, the sy stem goes into SPE- dow n mod e. In SPE- dow n
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 diagnostic s fail, refer to the ‘‘Proc ed ure for SPE-Dow n Mod e’’
section in Chapter 1, ‘‘Maintenanc e for csi systems’’.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run Full Name of MO
PR-MEM1
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-MEM1MINOR test memory a sh c RISC Memory