DFI CR908-B User Manual Download Page 15

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Chapter 3 Hardware Installation

Chapter 3

COM Express Connectors

GND (FIXED)

A56 PCIE_TX4-

B56 PCIE_RX4-

GBE0_MDI3-

GBE0_ACT#

A57 GND

B57 GPO2

LPC_FRAME#

A58 P

B58 P

GBE0_LINK100#

LPC_AD0

A59 PCIE_TX3-

B59 PCIE_RX3-

GBE0_LINK1000# B5

LPC_AD1

A60 GND (FIXED)

B60 GND (FIXED)

GBE0_MDI2-

LPC_AD2

A61 P

B61 P

LPC_AD3

A62 PCIE_TX2-

B62 PCIE_RX2-

GBE0_LINK#

LPC_DRQ0#

A63 GPI1

B63 GPO3

GBE0_MDI1-

LPC_DRQ1#

A64

B64

A10

B10

LPC_CLK

A65

PCIE_TX1-

B65

PCIE_RX1-

A11

GND (FIXED)

B11

GND (FIXED)

A66

GND

B66

WAKE0#

A12

GBE0_MDI0-

B12

PWRBTN#

A67

GPI2

B67 WAKE1#

A13

B13

SMB_CK

A68

B68 P

A14

GBE0_CTREF

B14

SMB_DAT

A69

PCIE_TX0-

B69 PCIE_RX0-

A15

SUS_S3#

B15

SMB_ALERT#

A70

GND(FIXED)

B70 GND (FIXED)

A16

B16

A71

B71

A17

SATA0_TX-

B17

SATA1_TX-

A72

LVDS_A0-

B72 LVDS_B0-

A18

SUS_S4#

B18

SUS_STAT#

A73

B73

A19

B19

A74

LVDS_A1-

B74 LVDS_B1-

A20

SATA0_RX-

B20

SATA1_RX-

A75

B75

A21

GND (FIXED)

B21

GND (FIXED)

A76 LVDS_A2-

B76 LVDS_B2-

A22

B22

A77 LVDS_VDD_EN B77

A23

SATA2_TX-

B23

SATA3_TX-

A78

B78 LVDS_B3-

A24

SUS_S5#

B24

PWR_OK

A79 LVDS_A3-

B79 LVDS_BKLT_EN

A25

B25

A80 GND (FIXED)

B80 GND (FIXED)

A26

SATA2_RX-

B26

SATA3_RX-

A81 LV

B81 LV

A27

BATLOW#

B27

WDT

A82

LVDS_A_CK-

B82 LVDS_B_CK-

A28

(S)ATA_ACT#

B28

AC/HDA _SDIN2

A83

LVDS_I2C_CK

B83

LVDS BKLT CTRL

A29

AC/HDA_SYNC

B29

AC/HDA _SDIN1

A84

LVDS_I2C_DAT B84 VCC_5V_SBY

A30

AC/HDA _RST#

B30

AC/HDA _SDIN0

A85

GPI3

B85 VCC_5V_SBY

A31

GND (FIXED)

B31

GND (FIXED)

A86

RSVD

B86 VCC_5V_SBY

A32

AC/HDA _BITCLK B32

SPKR

A87

RSVD

B87 VCC_5V_SBY

A33

AC/HDA _SDOUT B33

I2C_CK

A88

PCIE0 B88 BIOS_DIS1#

A34

BIOS_DIS0#

B34

I2C_DAT

A89

PCIE0_CK_REF- B89 VGA_RED

A35

THRMTRIP#

B35

THRM#

A90

GND (FIXED)

B90 GND (FIXED)

A36

USB6-

B36

USB7-

A91

SPI_POWER

B91 VGA_GRN

A37

USB6+

B37

USB7+

A92

SPI_MISO

B92 VGA_BLU

A38

USB_6_7_OC#

B38

USB_4_5_OC#

A93

GPO0

B93 VGA_HSYNC

A39

USB4-

B39

USB5-

A94

SPI_CLK

B94 VGA_VSYNC

A40

USB4+

B40

USB5+

A95

SPI_MOSI

B95 VGA_I2C_CK

A41

GND (FIXED)

B41

GND (FIXED)

A96

TPM_PP

B96 VGA_I2C_DAT

A42

USB2-

B42

USB3-

A97

TYPE10#

B97 SPI_CS#

A43

USB2+

B43

USB3+

A98

SER0_TX

B98 RSVD

A44

USB_2_3_OC#

B44

USB_0_1_OC#

A99

SER0_RX

B99 RSVD

A45

USB0-

B45

USB1-

A100 GND (FIXED)

B100 GND (FIXED)

A46

USB0+

B46

USB1+

A101 SER1_TX

B101 FAN_PWMOUT

A47

VCC_RTC

B47

EXCD1_PERST#

A102 SER1_RX

B102 FAN_TACHIN

A48

EXCD0_PERST#

B48

EXCD1_CPPE#

A103 LID#

B103 SLEEP#

A49

EXCD0_CPPE#

B49

SYS_RESET#

A104 VCC_12V

B104 VCC_12V

A50

LPC_SERIRQ

B50

CB_RESET#

A105 VCC_12V

B105 VCC_12V

A51 GND (FIXED)

B51 GND (FIXED)

A106 VCC_12V

B106 VCC_12V

A52 P

B52 P

A107 VCC_12V

B107 VCC_12V

A53 PCIE_TX5-

B53 PCIE_RX5-

A108 VCC_12V

B108 VCC_12V

A54 GPI0

B54 GPO1

A109 VCC_12V

B109 VCC_12V

A55 P

B55 P

A110 GND (FIXED)

B110 GND (FIXED)

Row A

Row B

Row A

Row B

GND (FIXED)

C56 PEG_RX1-

D56 PEG_TX1-

GND

C57 TYPE1#

D57 TYPE2#

USB_SSRX0-

USB_SSTX0-

C58

D58

C59 PEG_RX2-

D59 PEG_TX2-

GND

C60 GND (FIXED) D60 GND (FIXED)

USB_SSRX1-

USB_SSTX1-

C61

D61

C62 PEG_RX3-

D62 PEG_TX3-

GND

C63 RSVD

D63

RSVD

USB_SSRX2-

USB_SSTX2-

C64

RSVD

D64

RSVD

C10

D10

C65

D65

C11

GND (FIXED)

D11

GND (FIXED)

C66

PEG_RX4-

D66

PEG_TX4-

C12

USB_SSRX3-

D12

USB_SSTX3-

C67 NC

D67

GND

C13

D13

C68

D68

C14

GND

D14

GND

C69 PEG_RX5-

D69

PEG_TX5-

C15

DDI

D15

DDI1_CTRL

C70 GND (FIXED) D70 GND (FIXED)

C16

DDI1_PAIR6-

D16

DDI1_CTRLDATA_AUX- C71

D71

C17

RSVD

D17

RSVD

C72 PEG_RX6-

D72

PEG_TX6-

C18

RSVD

D18

RSVD

C73 GND

D73 GND

C19

D19

C74

D74

C20

PCIE_RX6-

D20

PCIE_TX6-

C75 PEG_RX7-

D75 PEG_TX7-

C21

GND (FIXED)

D21

GND (FIXED)

C76 GND

D76

GND

C22

D22

C77 RSVD

D77 IDE_CBLID#

C23

PCIE_RX7-

D23

PCIE_TX7-

C78

D78

C24

DDI1_HPD

D24

RSVD

C79 PEG_RX8-

D79 PEG_TX8-

C25

DDI

D25

RSVD

C80 GND (FIXED) D80 GND (FIXED)

C26

DDI1_PAIR4-

D26

DDI

C81

D81

C27

RSVD

D27

DDI1_PAIR0-

C82 PEG_RX9-

D82 PEG_TX9-

C28

RSVD

D28

RSVD

C83 TPM_PP

D83 RSVD

C29

DDI

D29

DDI

C84 GND

D84 GND

C30

DDI1_PAIR5-

D30

DDI1_PAIR1-

C85 P D85 P

C31

GND (FIXED)

D31

GND (FIXED)

C86 PEG_RX10-

D86 PEG_TX10-

C32

DDI2_CTRL D32

DDI

C87 GND

D87 GND

C33

DDI2_CTRLDATA_AUX- D33

DDI1_PAIR2-

C88 P

D88 P

C34

DDI2_DDC_AUX_SEL

D34

DDI1_DDC_AUX_SEL

C89 PEG_RX11-

D89 PEG_TX11-

C35

RSVD

D35

RSVD

C90 GND (FIXED) D90 GND (FIXED)

C36

DDI2_CTRL D36

DDI

C91 P

D91 P

C37

DDI2_CTRLDATA_AUX- D37

DDI1_PAIR3-

C92 PEG_RX12-

D92 PEG_TX12-

C38

DDI2_DDC_AUX_SEL

D38

RSVD

C93 GND

D93 GND

C39

DDI

D39

DDI

C94 P

D94 P

C40

DDI3_PAIR0-

D40

DDI2_PAIR0-

C95 PEG_RX13-

D95 PEG_TX13-

C41

GND (FIXED)

D41

GND (FIXED)

C96 GND

D96 GND

C42

DDI

D42

DDI

C97 RSVD

D97 RSVD

C43

DDI3_PAIR1-

D43

DDI2_PAIR1-

C98 P

D98 P

C44

DDI3_HPD

D44

DDI2_HPD

C99 PEG_RX14-

D99 PEG_TX14-

C45

RSVD

D45

RSVD

C100 GND (FIXED) D100 GND (FIXED)

C46

DDI

D46

DDI

C101 P

D101 P

C47

DDI3_PAIR2-

D47

DDI2_PAIR2-

C102 PEG_RX15-

D102 PEG_TX15-

C48

RSVD

D48

RSVD

C103 GND

D103 GND

C49

DDI

D49

DDI

C104 VCC_12V

D104 VCC_12V

C50

DDI3_PAIR3-

D50

DDI2_PAIR3-

C105 VCC_12V

D105 VCC_12V

C51 GND (FIXED)

D51 GND (FIXED)

C106 VCC_12V

D106 VCC_12V

C52 /

D52

C107 VCC_12V

D107 VCC_12V

C53 PEG_RX0-

D53 PEG_TX0-

C108 VCC_12V

D108 VCC_12V

C54 TYPE0#

D54 PEG_LANE_RV#

C109 VCC_12V

D109 VCC_12V

C55

D55

C110 GND (FIXED) D110 GND (FIXED)

Row C

Row D

Row C

Row D

Summary of Contents for CR908-B

Page 1: ...www dfi com Chapter 1 Introduction 1 CR908 B COM Express Compact Module User s Manual A21100211...

Page 2: ...ement on Class B This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reason able p...

Page 3: ...Diagram 10 Mechanical Diagram 11 System Memory 12 Installing the DIM Module 13 Connectors 14 CPU Fan Connector 14 COM Express Connectors 15 COM Express connector Signal Discription 16 Standby Power L...

Page 4: ...ur system unit Static electrical discharge can damage computer components without causing any signs of physical damage You must take extra care in han dling them to ensure against electrostatic build...

Page 5: ...board One heat sink One DVD One QR Quick Reference Optional Items COM331 B carrier board I O shield Cable kit for carrier board The board and accessories in the package may not come similar to the inf...

Page 6: ...3120ME 3M Cache 2 4GHz 35W Intel CoreTM i3 3217UE 3M Cache 1 6GHz 17W BGA 1023 packaging technology 22nm process technology Chipset Intel QM77 Express chipset System Memory One 204 pin SODIMM socket...

Page 7: ...t provides excellent video and 3D graphics with out standing graphics responsiveness These enhancements deliver the performance and compat ibility needed for today s and tomorrow s business applicatio...

Page 8: ...Basic Compact Mini 74 20 80 00 91 00 121 00 151 00 Common for all Form Factors Extended only Basic only Compact only Compact and Basic only Mini only COM Express Module Standards The figure below show...

Page 9: ...B3 Min Max DFI CR908 B Type 6 A B A B Thermal Protection 0 1 1 A B Battery Low Alarm 0 1 1 A B Suspend Wake Signals 0 3 2 A B Power Button Support 1 1 1 A B Power Good 1 1 1 A B VCC_5V_SBY Contacts 4...

Page 10: ...IMM Mobile Intel QM77 Express Chipset SM Bus HD Audio LPC Bus Intel GLAN PHY 82579LM LAN Ports A B C D PEG 16x LANES SM Bus SM Bus SM Bus HD Audio LPC Bus USB 2 0 8x SATA 2 0 2 SATA 3 0 2 SATA 2 0 2x...

Page 11: ...908 B Module 95 00 95 00 Bottom View Top View 2 70 4 pcs 0 00 12 50 70 20 0 00 0 00 4 00 87 00 91 00 76 00 4 00 0 00 91 00 4 00 87 00 87 00 91 00 91 00 0 00 4 00 0 00 2 00 14 00 4 00 87 00 95 00 23 60...

Page 12: ...amage your board processor disk drives add in boards and other components Perform installation procedures at an ESD workstation only If such a station is not available you can provide some ESD protect...

Page 13: ...board 4 Note the key on the socket The key ensures the module can be plugged into the socket in only one direction 6 Push down the module until the clips at each end of the socket lock into position Y...

Page 14: ...BIOS will display the cur rent speed of the cooling fan Refer to chapter 3 of the manual for more information 3 1 Sense Power Ground COM Express Connectors The COM Express connectors are used to inter...

Page 15: ...PCIE_RX5 A108 VCC_12V B108 VCC_12V A54 GPI0 B54 GPO1 A109 VCC_12V B109 VCC_12V A55 PCIE_TX4 B55 PCIE_RX4 A110 GND FIXED B110 GND FIXED Row A Row B Row A Row B C1 GND FIXED D1 GND FIXED C56 PEG_RX1 D5...

Page 16: ...d on Module SATA0_TX A17 O SATA AC coupled on Module SATA0_RX A19 I SATA AC coupled on Module SATA0_RX A20 I SATA AC coupled on Module SATA1_TX B16 O SATA AC coupled on Module SATA1_TX B17 O SATA AC c...

Page 17: ...led on Module PCI Express Differential Transmit Pairs 7 Optional with on board LAN Default setting as NC I PCIE AC coupled off Module PCI Express Differential Receive Pairs 6 O PCIE AC coupled on Modu...

Page 18: ...C coupled off Module PCI Express Graphics receive differential pairs 9 O PCIE AC coupled on Module PCI Express Graphics transmit differential pairs 9 I PCIE AC coupled off Module PCI Express Graphics...

Page 19: ...48 EXCD0_PERST A48 EXCD1_PERST B47 O CMOS 3 3V 3 3V PCI ExpressCard reset active low one per card ExpressCard Signals Descriptions I CMOS 3 3V 3 3V PU 10k to 3 3V PCI ExpressCard PCI Express capable c...

Page 20: ...I O PCIE AC coupled on Module DP AUX function if DDI3_DDC_AUX_SEL is no connect I O OD CMOS 3 3V 3 3V HDMI DVI I2C CTRLCLK if DDI3_DDC_AUX_SEL is pulled high I O PCIE AC coupled on Module DP AUX func...

Page 21: ...rier Board USB_SSTX0 D4 USB_SSTX0 D3 USB_SSRX0 C4 USB_SSRX0 C3 USB_SSTX1 D7 USB_SSTX1 D6 USB_SSRX1 C7 USB_SSRX1 C6 USB_SSTX2 D10 USB_SSTX2 D9 USB_SSRX2 C10 USB_SSRX2 C9 USB_SSTX3 D13 USB_SSTX3 D12 USB...

Page 22: ...pe Pwr Rail Tolerance PU PD Description SPI_CS B97 O CMOS 3 3V Suspend 3 3V Chip select for Carrier Board SPI may be sourced from chipset SPI0 or SPI1 SPI_MISO A92 I CMOS 3 3V Suspend 3 3V Data in to...

Page 23: ...ansmitter SER1_RX A102 I CMOS 3 3V 5V General purpose serial port 1 receiver Signal Pin Pin Type Pwr Rail Tolerance PU PD Description I2C_CK B33 I O OD CMOS 3 3V Suspend 3 3V PU 2 2K to 3 3VSB General...

Page 24: ...ate Active low output SUS_S5 A24 O CMOS 3 3V Suspend 3 3V Indicates system is in Soft Off state WAKE0 B66 I CMOS 3 3V Suspend 3 3V PU 10K to 3 3VSB PCI Express wake up signal WAKE1 B67 I CMOS 3 3V Sus...

Page 25: ...and suspend functions May be left unconnected if these functions are not used in the system design VCC_RTC A47 Power Real time clock circuit power input Nominally 3 0V GND A1 A11 A21 A31 A41 A51 A57...

Page 26: ...standby mode Cooling Option Heat Sink with Cooling Fan 1 and 2 denote the locations of the thermal pads designed to contact the corresponding components that are on CR908 B Top View of the Heat Sink...

Page 27: ...nto the carrier board The photo below shows the locations of the mounting holes on carrier board 2 Insert the provided mounting screws into the mounting holes from the bottom through the top of the ca...

Page 28: ...h other COM Express connec tors on CR908 B COM Express connectors on the carrier board Carrier board 7 Press CR908 B down firmly until it is completely seated on the COM Express connectors of the carr...

Page 29: ...Utility The BIOS Setup Utility can only be operated from the keyboard and all commands are key board commands The commands are available at the right side of each setup screen The BIOS Setup Utility d...

Page 30: ...ndor Core Version Compliency Project Version Build Date and Time System Date System Time Access Level American Megatrends 4 6 5 3 UEFI 2 3 PI 1 2 1APTJ 0 18 x64 03 30 2012 18 40 03 Fri 04 13 2012 15 4...

Page 31: ...uspend to RAM function Resume by PME Enable this field to use the PME signal to wake up the system via PCIE and onboard LAN Resume by RTC Alarm When Enabled the system uses the RTC to generate a wakeu...

Page 32: ...MHz 2 Supported Supported Supported Supported 32 kB x2 32 kB x2 256 kB x2 4096 kB Enabled All Disabled Disabled Select Screen Select Item Enter Select Change Opt F1 General Help F2 Previous Values F3...

Page 33: ...led disabled if SMX is enabled VT and VT d support must also be enabled prior to TXT Secure Mode Extension SMX Intel TXT LT Support Advanced Enabled Disabled Select Screen Select Item Enter Select Cha...

Page 34: ...available only for EFI applications XHCI Hand off This is a workaround for OSes that does not support XHCI hand off The XHCI own ership change should be claimed by the XHCI driver EHCI Hand off This i...

Page 35: ...Maximum time the device will take before it properly reports itself to the Host Controller Auto uses default value for a Root port it is 100 ms for a Hub port the delay is taken from Hub descriptor W...

Page 36: ...ity Copyright C 2011 American Megatrends Inc Version 2 14 1219 Copyright C 2011 American Megatrends Inc Intel PCH RC Version Intel PCH SKU Name Intel PCH Rev ID PCI Express Configuration USB Configura...

Page 37: ...ock Gating for each root port PCI Express Root Port 1 port 5 to PCI Express Root Port 7 Controls the PCI Express Root Port USB Configuration Enable or Disable XHCI Pre Boot Driver support Aptio Setup...

Page 38: ...l HDMI Codec Azalia HDMI Codec port B Azalia HDMI Codec port C Azalia HDMI Codec port D Auto Enabled Enabled Disabled Enabled Chipset Select Screen Select Item Enter Select Change Opt F1 General Help...

Page 39: ...en Select Item Enter Select Change Opt F1 General Help F2 Previous Values F3 Optimized Defaults ESC Exit DVMT Total Gfx Mem Select DVMT5 0 total graphic memory size used by the internal graphics devic...

Page 40: ...F2 Previous Values F3 Optimized Defaults ESC Exit Memory Configuration DDR3 or DDR3L selec tion Aptio Setup Utility Copyright C 2011 American Megatrends Inc Version 2 14 1219 Copyright C 2011 American...

Page 41: ...rein the function of the numeric keypad is the number keys When set to Off the function of the numeric keypad is the arrow keys Quiet Boot Enables or disables the quiet boot function Fast Boot Enables...

Page 42: ...assword Sets the administrator password User Password Sets the user password Set Administrator Password Aptio Setup Utility Copyright C 2011 American Megatrends Inc Version 2 14 1219 Copyright C 2011...

Page 43: ...mized default values select this field and then press Enter A dialog box will appear Select Yes to restore the default values of all the setup options Save as User Defaults To save changes done so far...

Page 44: ...tions required to enhance the performance of the system board Insert the CD into a CD ROM drive The autorun screen Mainboard Utility CD will appear If after inserting the CD Autorun did not automatica...

Page 45: ...Framework 3 5 make sure you have updated your Windows XP operating system to Service Pack 3 To install the driver click Microsoft NET Framework 3 5 on the main menu 1 Read the license agreement caref...

Page 46: ...o install the utility click Intel Chipset Device Software on the main menu 1 Setup is ready to install the utility Click Next 2 Read the license agreement then click Yes 4 After all setup operations a...

Page 47: ...n will turn blank for 1 to 2 minutes while WinSAT is running before the Windows Vista desktop appears The blank screen period is the time Windows is testing the graphics perfor mance We recommend that...

Page 48: ...ers make sure you have installed Microsoft NET Framework 3 5 SP1 To install the driver click Intel HD Graphics Drivers on the main menu 4 Setup is currently installing the driver After installation ha...

Page 49: ...l the driver click Intel Management Engine Drivers on the main menu 1 Setup is ready to install the driver Click Next 2 Read the license agreement then click Yes 3 Setup is currently installing the dr...

Page 50: ...3 0 Driver on the main menu 2 Read the license agreement then click Yes 1 Setup is ready to install the driver Click Next 3 Go through the readme docu ment for more installation tips then click Next...

Page 51: ...ng the system will allow the new software installation to take effect Audio Drivers for COM331 B Carrier Board To install the driver click Audio Drivers for COM331 B Carrier Board on the main menu Int...

Page 52: ...I Utility DFI Utility provides information about the board HW Health Watchdog DIO and Backlight To access the utility click DFI Utility on the main menu 2 Click I accept the terms in the license agree...

Page 53: ...pter 5 4 Click Install to begin the installation 5 After completing installation click Finish The DFI Utility icon will appear on the desktop Double click the icon to open the utility 3 Enter User Nam...

Page 54: ...nish Reboot the system for DirectX to take effect Intel Rapid Storage Technology The Intel Rapid Storage Technology is a utility that allows you to monitor the current status of the SATA drives It ena...

Page 55: ...ick Next 5 Setup is now installing the utility Click Next to continue 3 Read the license agreement then click Yes 6 Click Yes I want to restart my computer now then click Finish Restarting the system...

Page 56: ...ent Click Next F6 Floppy This is used to create a floppy driver diskette needed when you install Windows XP using the F6 installation method This will allow you to install the operating system onto a...

Page 57: ...Adobe Acrobat Reader 9 3 To install the reader click Adobe Acrobat Reader 9 3 on the main menu 1 Click Next to install or click Change Destination Folder to select another folder 2 Click Install to b...

Page 58: ...te http www nliteos com download html 2 Install nLite Important Due to it s coding with Visual Net you may need to first install NET Framework prior to installing nLite 3 Download relevant RAID AHCI d...

Page 59: ...table ISO Click Next 9 Click Insert and then select Multiple driver folder to select the drivers you will integrate Click Next 10 Select only the drivers ap propriate for the Windows version that you...

Page 60: ...e uncertain of the southbridge chip used on your motherboard select all RAID AHCI controllers and then click OK 12 Click Next 13 The program is currently integrating the drivers and applying changes t...

Page 61: ...16 Or you can choose to burn it directly to a disc by selecting the Direct Burn mode under the General section Select the optical device and all other necessary settings and then click Next 17 You hav...

Page 62: ...ted by the motherboard chip set from Intel s website Transfer the downloaded driver files to C AHCI 4 Open Device Manager and right click on one of the Intel Serial ATA Storage Con trollers then selec...

Page 63: ...1 A warning message appeared because the selected SATA controller did not match your hardware device Ignore the warning and click Yes to proceed 12 Click Finish 13 The system s settings have been chan...

Page 64: ...int count_L Set Count WriteEC 0xB7 count_H High Byte WriteEC 0xB8 count_L Low Byte Enable Watch Dog Timer WriteEC 0xB4 0x02 int GetWDTime void int sum data_h data_l Select EC Read Type outportb EC_En...

Page 65: ...Y HAS FAILED The CMOS battery is no longer functional It should be replaced Important Danger of explosion if battery incorrectly replaced Replace only with the same or equivalent type recommended by t...

Page 66: ...or s power switch is on 2 Check that one end of the monitor s power cord is properly attached to the monitor and the other end is plugged into a working AC outlet If necessary try another outlet 3 Che...

Page 67: ...attaching it to a serial port that is work ing and configured correctly If the serial device does not work either the cable or the serial device has a problem If the serial device works the problem ma...

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