Changing The Jumper Settings - Epson ActionTower 8000 User Manual

Changing the Jumper Settings

The jumpers on the system board are preset to factory default
positions, indicated by an asterisk (*) in the tables below. (See
the illustration under "Locating the System Board
Components" to locate jumpers.) Use the information in this
section to change jumper settings, if necessary.
Note
Any jumpers not listed in the following tables are for service
purposes only. Do not change their settings.
CPU clock jumper settings
CPU clock speed *
50 MHz (for 75 MHz CPU)
60 MHz (for 90 MHz CPU)
66 MHz (for 100 MHz CPU)
* Default setting depends on speed of CPU
Parallel port ECP mode DMA channel (DRQ) settings
Jumper number
JP8
JP9
External cache size jumper settings
External cache size
2 5 6 K B
5 1 2 K B
1 M B
JP16
pins 1-2
Off
Off
On
DRQ1 DMA channel
On pins 1-2 *
On pins 1-2 *
J P 1 0 *
O f f
O n
O n
Installing
JP16
pins 3-4
Off
On
On
DRQ3 DMA channel
On pins 2-3
On pins 2-3
J P 1 1 *
O f f
O f f
O n
and Removing Options 4-9