SUPER MICRO Computer 1.2b Cmos Clear, Watch Dog Enable/Disable, Clear Cmos Watch Dog Enable

Chapter 2: Installation

CMOS Clear

JBT1 is used to clear CMOS. Instead of pins, this "jumper" consists of contact pads to prevent the accidental clearing of CMOS. To clear CMOS, use a metal object such as a small screwdriver to touch both pads at the same time to short the connection. Always remove the AC power cord from the system before clear- ing CMOS.

Note: For an ATX power supply, you must completely shut down the sys- tem, remove the AC power cord and then short JBT1 to clear CMOS.

Watch Dog Enable/Disable

Watch Dog (JWD) is a system monitor that can reboot the system when a software ap- plication hangs. Close Pins 1-2 to reset the system if an application hangs. Close Pins 2-3 to generate a non-maskable interrupt signal for the application that hangs. See the table on the right for jumper settings. Watch Dog must also be enabled in the BIOS.

		P2 DIMM3A	JPI2C1
FAN6	FAN5	P2 DIMM3B	PWR I2C
			FAN7 CPU FAN1	JPW1	JPW2	JPW3

Watch Dog

Jumper Settings (JWD)

Jumper Setting	Definition
Pins 1-2	Reset
	(default)
Pins 2-3	NMI
Open	Disabled

A. Clear CMOS

B. Watch Dog Enable

	KB/MS
COM1 (Bottom)	VGA (Top)
USB0/1	IPMI LAN	PHY
USB 2/3/4/5		Chip
		LAN2(Top)
(Bottom)
LAN1
AUDIO
Header
	7.1HD AUDIO	CPU2 FAN
	CD1
Audio
CTRL

P2 DIMM3C

P2 DIMM2A

P2 DIMM2B

P2 DIMM2C

P2 DIMM1A

P2 DIMM1B

P2 DIMM1C

ALWAYS POPULATE DIMM1 FIRST

CPU2

Slot7 PCI-E 2.0 x8

Slot6 PCI-E 2.0 x16

CPU1

P1 DIMM1C

P1 DIMM1B

P1 DIMM1A

P1 DIMM2C

P1 DIMM2B

P1 DIMM2A

P1 DIMM3C

P1 DIMM3B

P1 DIMM3A

ALWAYS POPULATE DIMM1 FIRST

X8DAH+ Rev. 2.01

JD1

FAN2 JF1 FPCTL FAN1

SP1

	Firmware
	BMC	Slot5 PCI-E 2.0 x4 (in x8 Slot)
		JI2C2	JI2C1
	LAN		Slot4 PCI-E 2.0 x8 (in x16 Slot)
	CTRL
			Slot3 PCI-E 2.0 x8
	BMC
	CTRL		Slot2 PCI-E 2.0 x16
DP5	BMC Graphics
A	Memory		Slot1 PCI-E 2.0 x8
		1
			COM2
	JPG1	SMBUS1 JLPC80
	JPL1

DP4

				I-FAN2					FAN3
			Intel
			IOH-36D					JBAT1
				Intel			BIOS A	FLOPPY	IDE
				IOH-36D			JBT1
							Intel
							ICH 10R
							(SouthBridge)	JIDE1
				JPI1			I-FAN1		FAN4
				1394
S I/O	JPT1		JP5	CTRL			I-SATA3 I-SATA1
		J14		1394-1 1394-2
			J15 J139USB6/7				JUSB5
B			JP4				I-SATA5
JL1 JWD1			JUSB4 CNF1		CNF2	JP9 JUSB2	I-SATA4 I-SATA2 I-SATA0		JOH1

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