Intel IB850 User Manual

Page 16

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INSTALLATIONS

IB850 User’s Manual

JP1: Clear CMOS Contents
Use JP1, a 3-pin header, to clear the CMOS contents. Note that the
ATX-power connector should be disconnected from the CPU card before
clearing CMOS.

JP1

Setting

Function

Pin 1-2

Short/Closed

Normal

Pin 2-3

Short/Closed

Clear CMOS

JP2, JP3, JP4: RS232/422/485 (COM2) Selection
J4, COM1 is fixed for RS-232 use only.
J5, COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings for COM2 selection.

COM2

Function

RS-232

RS-422

RS-485

Jumper
Setting

(pin closed)

JP2:

1-2

JP3:

3-5 & 4-6

JP4:

3-5 & 4-6

JP2:

3-4

JP3:

1-3 & 2-4

JP4:

1-3 & 2-4

JP2:

5-6

JP3:

1-3 & 2-4

JP4:

1-3 & 2-4

JP6: 82551 10/100Mb LAN Enable/Disable

JP6

Function

Enable LAN

Disable LAN