Epson ActionDesk 4000, Руководство пользователя

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Installing External Cache
You can install 64KB, 128KB, or 256KB of external cache on
your system.
To install 64KB of external cache, use eight SRAM, 28-pin,
8 x 8, 20ns DIP chips, and one 8 x 8, 20ns tag chip
To install 128KB of external cache, use four SRAM, 28-pin,
32 x 8, 20ns DIP chips, and one 8 x 8, 20ns tag chip
To install 256KB of external cache, use eight SRAM, 28-pin,
32 x 8, 20ns DIP chips, and one 32 x 8, 20ns tag chip
To install any cache on a 486DX/50 system, make sure the
tag chip is a 15ns chip.
For the cache memory to work properly, you must install chips
in the following configuration (each bank contains four cache
memory sockets):
Cache memory configurations
BANK0
BANK1
Tag SRAM
U20,21,22,23 U29,30,31,32
U36
Total cache
8 K x 8 8 K x 8 8 K x 8
64KB
3 2 K x 8
X
8 K x 8 128K8
3 2 K x 8 3 2 K x 8 3 2 K x 8 256KB
4-22 Installing and Removing
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