Epson 4SX/25 User Manual

EPSON Equity 4SX/25, 4DX/33, and 4DX2/50

If the computer’s microprocessor is a 

 type, it is 

mounted on the main system board. To add an 

processor, install it in the empty 

 socket and

disable the original microprocessor by setting jumper J23 to

position 2-3. Also make sure 

 J11, and J12 are set correctly.

You need to change the processor speed jumper settings if

you replace a 25 MHz processor with a 33 MHz processor.

If you have the 

 or 

 system, you can install an

Intel 

 processor on the main system board to

effectively double the internal clock speed of the computer’s

microprocessor. Alternatively, for the 

 you can install

the 

 microprocessor with built-in math coprocessor.

l 

l 

I

I

I

I

I

I

You need to change the processor jumper settings if you

install a new processor chip. The settings for J10, J11, and J12

must correspond to the type of chip installed.

The computer comes with 4MB of memory installed in a

SIMM socket. To increase the amount of memory in the

computer up to 32MB, you can install 36-bit, fast-page mode

SIMMs that operate at an access speed of 70ns or faster, with

a capacity of 1MB, 4MB, or 16MB.
The following table shows the possible SIMM configurations;

do not install memory in any other configuration. Make sure

that both SIMMs operate at the same speed.
SIMM Configurations

i 

. . ..-

. . ..-

B

 

B

B