Cache Type Selection Jumpers; Memory Type Selection Jumper - Fujitsu ErgoPro e Series Specialist's Handbook

ErgoPro e-, x- and s- Series

Cache type selection jumpers

The integrated cache controller (OPTI 82C557M) supports 0/256/512kB Asynchronous and Pipeline Burst
Synchronous implementations using a direct-mapped write-back scheme. It supports read and write bursting 3-2-
2-2 bursts for Asynchronous and 3-1-1-1 burst for synchronous SRAM's.
Picture 23: Cache selection jumpers location
Jumper Cache Type 1
Jumper Cache Type 2
(This jumper may not be
available on
boards)

Memory type selection jumper

The 64-bit memory subsystem supports two types of 32-bit SIMM modules, EDO mode DRAM and Fast Page
mode DRAM (standard DRAM). These types of RAM can be used at the same time, but not in the same memory
bank. EDO DRAM can be used in BANK 0 and Fast Page DRAM in BANK 1 or vice versa, but not mixed in the
same bank. To full fill the 64-bit data bus width, SIMM modules must be installed in pairs. Jumpers for memory
type must be always set according to the installed SIMM type.
EDO RAM in Bank 0 & Bank 1 (or no SIMMs
in BANK 1)
Fast Page RAM in Bank 0 & Bank 1 (or no
SIMMs in BANK 1)
Page 18
Cache type
selection 1
Cache type
selection 2
Synchronous Cache
Module installed
all the
PC Specialist's Handbook
Asynchronous Cache
Module installed/
No Cache
Jumper setting
EDO
Bank 0
Fast Page
EDO
Bank 1
Fast Page
"Front" edge of the PCB
EDO
Bank 0
Fast Page
EDO
Bank 1
Fast Page
"Front" edge of the PCB
First Edition, Release 4 - June 1998