Intel IB850 user manual JP1 Clear Cmos Contents, JP6 82551 10/100Mb LAN Enable/Disable

INSTALLATIONS

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	Normal
Short/Closed
Pin 2-3	Clear CMOS
Short/Closed

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		RS-232		RS-422		RS-485
Function
		JP2:		JP2:		JP2:
	1-2		3-4		5-6
Jumper
Setting		JP3:		JP3:		JP3:
(pin closed)	3-5 & 4-6		1-3 & 2-4		1-3 & 2-4
		JP4:		JP4:		JP4:
	3-5 & 4-6		1-3 & 2-4		1-3 & 2-4

JP6: 82551 10/100Mb LAN Enable/Disable

JP6

Function

Enable LAN

Disable LAN

12 IB850 User’s Manual