Changing the Jumper Settings
The jumpers on the main system board control certain
functions and are preset to factory default positions. (See the
illustration above to locate the jumpers.)
Use the information in the following tables 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.
Miscellaneous jumper settings
Jumper
number
J3
J6
J7
J8
J9
J10
J11
J12
J13
Jumper
setting
1-2
OFF*
I-2*
2-3
I-2*
2-3
I-2*
2-3
I-2*
2-3
I-2*
2-3
I-2*
2-3
I-2*
2-3
I-2*
2-3
Function
Enables VGA IRQ
Disables VGA IRQ
Enables COM 1
Disables COM 1
Assigns COM 1 serial port asCOM1 (3F8H-3FFH)**
Assigns COM 1 serial
port as COM 3 (3E8H-3EFH)**
Enables COM 2
Disables COM 2
Assigns COM 2 serial
AssignsCOM 2 serial
port as COM 2 (2F8H-2FFH)**
port as COM 4 (2E8H-2EFH)**
Enables parallel port
Disablesparallel port
Assigns parallel port asLPT1 (378H-37FH)**
Assigns parallel port asLP12 (278H-27FH)**
Enablesoptional game port
Disablesoptional game port
Enables diskette drive controller
Disables diskette drive controller
Installing and Removing Options
3-7