Epson 4000 - Manual (Page 54)

Use the information in the following tables to change jumper
settings, if necessary.
Jumper settings
Jumper Jumper
number setting Function
J5 1-2 * Assigns PARALLEL port as LPT1
2-3 Assigns PARALLEL port as LPT2
J6 1-2 * Assigns COM 1 serial port as COM 1
2-3 Assigns COM 1 serial port as COM3 **
J7 1-2 * Assigns COM2 serial port as COM2
2-3 Assigns COM2 serial port as COM4 **
J8 1-2’ Enables diskette drive controller
2-3 Disables diskette drive controller
J16 1-2 *** Selects a CPU clock speed of 33 MHz (486SX/33,
486DX33, 486DX2/66)
5-6 Selects a CPU clock speed of 25 MHz (486SX/25,
486DX2/50)
J22
J34
Off’
On
2-3
l
3-4
Selects turbo speed
Selects 8 MHz speed
Selects the system board battery
Discharges CMOS memory (this resets the SETUP
values to their factory defaults)
J35 1-2
l
Enables the IDE hard disk drive controller
2 - 3 Disables the IDE hard disk drive controller
* Factory setting
**
You can use MS-DOS to automatically reassign parallel and serial ports.
Check your MS-DOS manual for more information.
*** Setting depends on CPU
Installing and Removing Options 4-7