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The setup of the configuration jumpers on the Single Board Computer is described below. * indicates the default value of each jumper.

NOTE:
For two-position jumpers (3-post), "TOP" is toward the memory sockets; "BOTTOM" is toward the edge fingers.

* = default value

JU6 THERMAL THROTTLING ACTIVITY LED
If the processor core gets to a critical temperature, it slows itself down to half its normal speed. This jumper sets the way in which the LED displays in response to this self-limiting mode.

Install for real-time activity. The LED lights only when the processor is operating in slow-power mode. *

Remove for latched activity. The LED lights and stays on once the processor has gone into slow-power mode.

JU8 PASSWORD CLEAR
Install for one power-up cycle to reset the password to the default (null password).
Remove for normal operation. *

JU10/JU11 SYSTEM FLASH ROM OPERATIONAL MODES
The Flash ROM has two programmable sections: the Boot Block for “flashing” in the BIOS and the Main Block for the executable BIOS and PnP parameters. Normally only the Main Block is updated when a new BIOS is flashed into the system.

	JU10	JU11
All Blocks Write Enabled	Remove *	Remove *
Boot Block Write Protected	Install	Remove
Block 2-16 Write Protected	Remove	Install

JU12 CMOS CLEAR
Install on the TOP to operate. *
Install on the BOTTOM to clear.

NOTE: The CMOS Clear jumper works on power-up. To clear the CMOS, power down the system, install the jumper, then turn the power back on. Wait for at least two seconds and turn the power off. Then remove the jumper and turn the power on.
When AMIBIOS displays the "CMOS Settings Wrong" message, press F1 to go into the BIOS Setup Utility, where you may reenter your desired BIOS settings, load optimal defaults or load failsafe defaults.

NOTE:
Pin 1 on the connectors is indicated by the square pad
on the PCB.

P3 - FLOPPY DRIVE CONNECTOR
34 pin dual row header, Amp #103308-7

PIN SIGNAL 1 Gnd 3 Gnd 5 Gnd 7 Gnd 9 Gnd 11 Gnd 13 Gnd 15 Gnd 17 Gnd 19 Gnd 21 Gnd 23 Gnd 25 Gnd 27 Gnd 29 Gnd 31 Gnd 33 Gnd

PIN SIGNAL 2 N-RPM 4 NC 6 D-Rate0 8 P-Index 10 N-Motoron 1 12 N-Drive Sel2 14 N-Drive Sel1 16 N-Motoron 2 18 N-Dir 20 N-Stop Step 22 N-Write Data 24 N-Write Gate 26 P-Track 0 28 P-Write Protect 30 N-Read Data 32 N-Side Select 34 Disk Chng

P4A - KEYBOARD HEADER
5 pin single row header, Amp #640456-5

PIN SIGNAL 1 Kbd Clock 2 Kbd Data 3 Key 4 Kbd Gnd 5 Kbd Power (+5V fused) with self-resetting fuse

P5 - SPEAKER PORT CONNECTOR
4 pin single row header, Amp #640456-4

PIN SIGNAL 1 Speaker Data 2 Key 3 Gnd 4 +5V

P6 - SERIAL PORT 1 CONNECTOR
10 pin dual row header, Amp #103308-1

PIN SIGNAL 1 Carrier Detect 3 Receive Data-I 5 Transmit Data-0 7 Data Terminal Ready-0 9 Signal Gnd

PIN SIGNAL 2 Data Set Ready-I 4 Request to Send-O 6 Clear to Send-I 8 Ring Indicator-I 10 NC

P7 - SERIAL PORT 2 CONNECTOR
10 pin dual row header, Amp #103308-1

PIN SIGNAL 1 Carrier Detect 3 Receive Data-I 5 Transmit Data-0 7 Data Terminal Ready-0 9 Signal Gnd

PIN SIGNAL 2 Data Set Ready-I 4 Request to Send-O 6 Clear to Send-I 8 Ring Indicator-I 10 NC

P8 - PARALLEL PORT CONNECTOR
26 pin dual row header, Amp #103308-6

PIN SIGNAL 1 Strobe 3 Data Bit 0 5 Data Bit 1 7 Data Bit 2 9 Data Bit 3 11 Data Bit 4 13 Data Bit 5 15 Data Bit 6 17 Data Bit 7 19 ACK 21 Busy 23 Paper End 25 Slct

PIN SIGNAL 2 Auto Feed XT 4 Error 6 Init 8 Slct In 10 Gnd 12 Gnd 14 Gnd 16 Gnd 18 Gnd 20 Gnd 22 Gnd 24 Gnd 26 NC

P9 - PS/2 MOUSE AND KEYBOARD CONNECTOR
6 pin mini DIN, Kycon #KMDG-6S-B4T

PIN SIGNAL 1 Ms Data 2 Kbd Data 3 Gnd 4 Power (+5V fused) with self-resetting fuse 5 Ms Clock 6 Kbd Clock

P9A - PS/2 MOUSE HEADER
6 pin single row header, Amp #640456-6

PIN SIGNAL 1 Ms Data 2 Reserved 3 Gnd 4 Power (+5V fused) with self-resetting fuse 5 Ms Clock 6 Reserved

P10 - EXTERNAL RESET CONNECTOR
2 pin single row header, Amp #640456-2

PIN SIGNAL 1 External Reset In (Low Active) 2 Gnd

P11 - PRIMARY IDE HARD DRIVE CONNECTOR
40 pin dual row header, 3M #30340-6002HB

PIN SIGNAL 1 Reset 3 Data 7 5 Data 6 7 Data 5 9 Data 4 11 Data 3 13 Data 2 15 Data 1 17 Data 0 19 Gnd 21 DRQ 0 23 IOW 25 IOR 27 IORDY 29 DACK 0 31 IRQ 14 33 Add 1 35 Add 0 37 CS 1P 39 IDEACTP

PIN SIGNAL 2 Gnd 4 Data 8 6 Data 9 8 Data 10 10 Data 11 12 Data 12 14 Data 13 16 Data 14 18 Data 15 20 NC 22 Gnd 24 Gnd 26 Gnd 28 SELPDP 30 Gnd 32 NC 34 PCBL DET * 36 Add 2 38 CS 3P 40 Gnd

* For ATA/66 and ATA/100 drives, which should be set for Cable Select for proper speed operation. If other Drives are detected, pin definition is Gnd.

P11A - SECONDARY IDE HARD DRIVE CONNECTOR
40 pin dual row header, 3M #30340-6002HB

PIN SIGNAL 1 Reset 3 Data 7 5 Data 6 7 Data 5 9 Data 4 11 Data 3 13 Data 2 15 Data 1 17 Data 0 19 Gnd 21 DRQ 1 23 IOW 25 IOR 27 IORDY 29 DACK 1 31 IRQ15 33 Add 1 35 Add 0 37 CS 1S 39 IDEACTS

PIN SIGNAL 2 Gnd 4 Data 8 6 Data 9 8 Data 10 10 Data 11 12 Data 12 14 Data 13 16 Data 14 18 Data 15 20 NC 22 Gnd 24 Gnd 26 Gnd 28 SELPDS 30 Gnd 32 NC 34 SCBL DET * 36 Add 2 38 CS 3S 40 Gnd

* For ATA/66 and ATA/100 drives, which should be set for Cable Select for proper speed operation. If other drives are detected, pin definition is Gnd.

P12 - HARD DRIVE LED CONNECTOR
4 pin single row header, Amp #640456-4

PIN SIGNAL 1 LED + 2 LED - 3 LED - 4 LED +

P15 - VIDEO INTERFACE CONNECTOR
15 pin HD15 connector, Amp #1-1470250-3

PIN SIGNAL 1 Red 2 Green 3 Blue 4 NC 5 Gnd

PIN SIGNAL 6 Gnd 7 Gnd 8 Gnd 9 +5V 10 Gnd

PIN SIGNAL 11 NC 12 EEDI 13 HSYNC 14 VSYNC 15 EECS

P16 - 10/100BASE-T ETHERNET CONNECTOR
8 pin shielded RJ-45 connector, Pulse #J0035D21B

PIN SIGNAL 1 TD+ 2 TD- 3 RX+ 4 NC

PIN SIGNAL 5 NC 6 RX- 7 NC 8 NC

P17A - UNIVERSAL SERIAL BUS (USB) CONNECTOR
4 USB vertical connector, Molex #67329-0000
(+5V over current protection)

PIN SIGNAL 1 +5V - USB0 2 USB0- 3 USB0+ 4 Gnd - USB0

P17B - UNIVERSAL SERIAL BUS (USB) CONNECTOR
4 USB vertical connector, Molex #67329-0000
(+5V over current protection)

PIN SIGNAL 1 +5V - USB1 2 USB1- 3 USB1+ 4 Gnd - USB1

P18 - SYSTEM HARDWARE MONITOR CONNECTOR
4 pin single row header, Amp #640456-4

PIN	SIGNAL
1	Gnd
2	GPO (General Purpose Output)
3	CI (Chassis Intrusion Input)
4	OVT (Over Temperature)

P19 - CPU FAN
3 pin single row header, Molex #22-23-2031

PIN SIGNAL 1 Gnd 2 +12V 3 FanTach

P21 - POWER GOOD LED
2 pin single row header, Amp #640456-2

PIN SIGNAL 1 LED - 2 LED +

P22 - SYSTEM MANAGEMENT BUS CONNECTOR
2 pin single row header, Amp #640456-2

PIN SIGNAL 1 SMB Clock 2 SMB Data

P23 - +5V VRM SUPPLY
2 pin header, Molex #39-29-3026

PIN SIGNAL 1 +5V 2 +5V

P24 - +12V VRM POWER INPUT
4 pin header, Molex #39-29-3046

PIN SIGNAL 1 Gnd 2 Gnd 3 +12V 4 +12V

The Double Data Rate (DDR) memory interface consists of a single channel which terminates in two dual-in-line memory module (DIMM) sockets and supports auto detection of up to 2GB of memory. The System BIOS automatically detects memory type, size and speed.

The Single Board Computer uses industry standard 64-bit wide gold finger PC1600 or PC2100 memory modules in 184-pin DIMM sockets.

NOTE: Memory modules can be installed in one or both DIMM sockets. If only one DIMM module is used, it should be populated in the top DIMM socket (Bank 2 - Bk2). If two modules of different speeds are used, the 845GV chipset sets the memory interface speed to the speed of the slower DIMM module. Registered DIMMs are not supported. All memory modules must have gold contacts.

The Single Board Computer supports DIMMs which are PC1600/PC2100 compliant and have the following features:

• 184-pin with gold-plated contacts
• Non-ECC (64-bit) DDR memory
• Unbuffered configuration
• X8, x16 construction
• Non-stacked (NS)

NOTE: Intel's DDR memory interface design guidelines for the 845GV chipset validate the use of non-stacked DIMM modules. Therefore, the T4G, which uses the 845GV chipset, supports only non-stacked DIMMs in its standard system BIOS.

* Intel, Pentium and Celeron are registered trademarks of Intel Corporation.

All other product names are trademarks of their respective owners.

T4G Product Detail
T4G Reference Manual