Service Procedures
Service Procedures
Digital PRIORIS XL Server
Digital PRIORIS XL Server
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MCS Logistics Engineering - Nijmegen
MCS Logistics Engineering - Nijmegen
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Installation Procedures
Installing Additional Secondary Cache Memory (i486 CPU Modules)
The CPU module is equipped with 128 KB direct-mapped adaptive write-back secondary cache memory.
This secondary cache memory is designed to improve the performance of the installed CPU.
An additional 128 KB cache memory option is available to increase secondary cache memory to 256 KB.
This kit consists of four 32 KB
×
8 SRAM chips installed in DIP sockets on the CPU module.
CAUTION
If the computer contains 64 MB or more of memory, install an additional 128 KB of
secondary cache. Failure to do so can cause server failure.
To install additional secondary cache memory:
1) Remove the CPU module.
2) Place the CPU module on an anti-static surface.
3) Locate the secondary cache memory DIP sockets on the CPU module.
4) Remove the secondary cache memory chips from their anti-static packaging, handling each chip only
by their edges.
5) Position each chip with the notched end facing to the right of the CPU module.
6) Insert each chip into the appropriate DIP socket.
CAUTION
Make sure each SRAM chip's pin 1 location is properly aligned with the pin 1 location
on the socket (A, Figure 3 - 15). Improper installation can cause faulty computer
operation.
