Digital Equipment PRIORIS MTE, Руководство по техническому обслуживанию, Страница: 43 / 73

Digital PRIORIS MTE Server Service Procedures
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Secondary Cache Memory
The DECpc 400 MTE Series computer is equipped with 128 KB direct-mapped write back secondary cache
memory. The secondary cache memory is designed to improve the performance of the microprocessor.
An additional 128 KB cache memory option is available to increase secondary cache memory to 256 KB. This
kit consists of four 20 ns, 32 KB
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8 SRAM DIP chips installed in sockets provided on the main logic board.
CAUTION.
Make sure pin 1 on each SRAM chip is correctly aligned with the pin 1 location on the
socket (Figure 3- 18). The chip is correctly installed when the notched side of both the
chip and the socket are aligned. Incorrect installation may cause faulty computer
operation.
Figure 3 - 18 Cache Memory Upgrade