Hardware Setup
Selecting the Cache Size
The system board supports 128-KB, 256-KB, and 512-KB, write-back
and write-through second-level cache. See the table below for the
possible cache configurations.
The second-level cache is upgradable from 128 KB to 512 KB. The
system supports both write-back and write-through modes.
Cache
Size
TAG SRAM
(U31)
Data SRAM
Location
128 KB
16 Kb x 8 or
32 Kb x 8
32 Kb x 8 x 4 pcs.
Bank 0
256 KB
16 Kb x 8 or
32 Kb x 8
32 Kb x 8 x 8 pcs.
Banks 0 and 1
256 KB
16 Kb x 8 or
32 Kb x 8
64 Kb x 8 x 4 pcs.
Bank 0
512 KB
32 Kb x 8
64 Kb x 8 x 8 pcs.
Banks 0 and 1
512 KB
32 Kb x 8
128 Kb x 8 x 4 pcs.
Bank 0
Follow these steps to install SRAMs:
1.
Locate the cache sockets on the system board. See the section
Board Layout
.
2.
Insert the SRAM chip into the socket. Align the straight edge of
the chip with the straight edge of the socket. Also, make sure
that the cut edge of the chip corresponds to the cut edge of the
cache socket. See the figure below.
Always install SRAMs beginning with Bank 0.
2-16
User’s Guide
Содержание AP41
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