Changing The Jumper Settings - Epson ActionTower 3000 Computer User Manual

Changing the Jumper Settings

The jumpers on the main system board control certain
functions and are preset at the factory to default positions;
however, you can use the information in the following tables to
change their settings, if necessary. (The jumpers listed in the
tables are the only ones you may need to change; others are for
service purposes only.)
Miscellaneous jumper settings
jumper Jumper
number setting
JA
1-2*
2-3
JB** 1-2*
2-3
JC 1- 2*
2-3
JD 1-2*
2-3
JE** 1-2*
2-3
J4 1-2
2-3*
J5 1-2*
2-3
J6 1-2*
2-3
J7
1 - 2 *
2-3
J8
1-2*
2-3
J10
O n *
Off
J17***
1 - 2
3-4
1-2, 3-4
5-6
3-6 Installing
Function
Enables LPT (parallel port)
Disables LPT (parallel port)
Enables HDC (lDE hard disk drive controler)
Disables HDC ODE hard disk drive controler)
Enables COMA (serial port1)
Disables COMA (serial part 1)
Enables COMB (serial port 2)
Disables COMB (serial-port 2)
Enables HDC (lDE hard disk drive controller)
Dlsablss HDC (IDE hard disk drive controller)
Enables game port (J1)
Disables game port (J1)
Assigns the parallel port as LPTl (378h-37Fh)
Assigns the parallel port as LPT2 (278h-27Fh)
Assigns serial port 1 as COM1 (3F8h-3FFh)
Assigns serial port 1 as COM3 (3E8h-3EFh)
Assigns serial port 2 as COM2 (2F8h-2FFh)
Assigns serlal port 2
Enables the diskette drive controlIer
Disables the diskette drive controller
Enables VGA interrupt
Disables VGA interrupt
Microprocessor installed runs at 33 MM or 66 MM or a
multiple of these (486SX/33. 486DX/33, 486DX2/66, DX4/100
and Pentium)
Microprocessor installed is a 486DX/50
Microprocssor installed is a DX/40
Microprocessor installed at 25 MHz or 50 MHz or a
multIpIe of these (486SX/25, 486DX2/50. DX4/75. and SX2/50)
and Removing Options
as COM4 (2E8h-2EFh)