TYAN TEMPEST II Manual page 16

3.6 Upgrading Cache Memory (Standard SRAM Only)
Standard on S1462 is a 256KB 2nd level cache. It uses 8 32K*8 SRAM's
You can upgrade the cache to 512KB to improve system performance. It
uses 64K*8 SRAM's.
NOTICE: The 64K*8 SRAM chip is longer in length than the 32K*8
chip. Do not insert the 32 K*8 SRAM chip into the top four pin
holes of the socket, it could cause serious damage to your SRAM
chips. Refer to the diagram below.
All SRAM chips must be 20ns (nanoseconds) or faster. The chart below
shows the chips you need for each configuration.
SRAM CACHE SIZE
2 5 6 K B
5 1 2 K B
* J6 always on 1-2
* J8 always on 2-3
* All the standard SRAM must be 3.3V output. Please contact the
MANUFACTUR if upgrades for the SRAMs are needed.
Installation of 2nd Level Cache Memory
Pin1
256 KB Cache
Use 32K*8 SRAM's
S1462-001-01
Number and Size Pin Configuration
Eight 32K*8 28
Eight 64K*8 32
Pin 1
512 KB Cache
Use 64K*8 SRAM's
16
J 7
pins/chip
2-3
pins/chip
1-2