Epson ActionDesk 4000 User Manual - Page 55

Setting the Jumpers, Processor

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External cache jumper settings* Cache size J25 64KB 1-2 128KB 2-3 256KB 2-3 J26 1-2 I 1-2 2-3 J27 J28 Off 2-3 1-2 1 1-2 2-3 2-3 l If you have no external cache installed, the position of these jumpers does not matter. Processor type jumper settings Processor type J17 J19 I 486DX/DX2 486SX 1-2.3-4 1-2 I 2-3 Off I Setting the Jumpers If you need to change any jumper settings, follow these steps: 1. Refer to the illustration on page 4-6 to locate the jumpers. 2. If there are any option cards installed in your computer, you need to remove them to access the jumpers. See page 4-18. 3. A jumper's setting is determined by where the jumper is placed on the pins. Use the following table to identify the pin settings for 2-pin, 3-pin, and 4-pin jumpers. To identify pin 1, look at the system board under the jumper. You will see a triangle traced on the board at pin 1. 4-8 Installing and Removing Options

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External cache jumper settings*
Cache size
J25
J26
J27
J28
64KB
1-2
1-2
Off
2-3
128KB
2-3
I
1-2
1-2
1
1-2
256KB
2-3
2-3
2-3
2-3
l
If you have no external cache installed, the position of these jumpers does
not matter.
Processor
type jumper settings
Processor type
J17
J19
I
486DX/DX2
1-2.3-4
1-2
I
486SX
2-3
Off
I
Setting the Jumpers
If you need to change any jumper settings, follow these steps:
1.
Refer to the illustration on page 4-6 to locate the jumpers.
2.
If there are any option cards installed in your computer, you
need to remove them to access the jumpers. See page 4-18.
3.
A jumper’s setting is determined by where the jumper is
placed on the pins. Use the following table to identify the
pin settings for 2-pin, 3-pin, and 4-pin jumpers. To identify
pin 1, look at the system board under the jumper. You will
see a triangle traced on the board at pin 1.
4-8
Installing and Removing Options