User Manual for USBJTAG NT September 2010 (0.42)
Contents
1. F4 Write chip CTRL W Mac Info Change Mac 2048KB 8 20 2009 8 13 22 PM Save data for backup USB Not connected DEBUG OFF Memory view You can view the memory and also execute commands with the right click the memory tab to trigger pull down menu To read file you can use drag from the left file browser or external file browser USB JTAG NT 0 42a http Avww usbjtag com Testing SB5101 Not Activated DER Fie Tools 585100 Testing Help CDA O 8 BOB 20 revive v sote v 00000000 Cause 00000000 BadVaddr 00000000 00000000 Lo 00000000 DEBUG 00000000 General Registers ro 00000000 at 00000000 v0 00000000 v1 00000000 a0 00000000 al 00000000 az 00000000 a3 00000000 to 00000000 ti 00000000 t2 00000000 t3 00000000 t4 00000000 t5 00000000 t 00000000 t7 00000000 50 00000000 si 00000000 s2 00000000 53 00000000 54 00000000 55 00000000 s 00000000 s7 00000000 ts 00000000 t9 00000000 k0 00000000 ki 00000000 gp 00000000 sp 00000000 ss 00000000 ra 00000000 00000000 EPC 00000000 HI Statiis 1 l 1 Register view display MIPS Or MC6833X register values when in aepug mode Note For some board when power on and you see DEBUG ON type r command If PC is 0xBFC00000 then type g or press F5 to run the target 10 Check the version of software Help gt about version of the software printed out Example 2 About USB JTAG NT2. USB JTAG NT 0 42a Copyright C 2010 2011 2012 http www usbjtag com Contact uthor 585100 Test Version 0 04 No Hardware USBJTAG NT is the main application Test module is the plug in DLL If present a new pull down menu exists after the Tools menu The plug in DLL must exist in the same folder as the main USB JTAG application Configure the software Before the software can be used configuration must be done based on your target Xml configuration files exists under the config directory 3 2 GUI Usage Even though the command line interface provides more power many of its functions can be simplified by the included GUI interface Range selection Memory access needs the start address and the length of the target memory In the tool bar there is a drop down box that contains predefined start addresses and length with sudo names One can also click the tabs under the middle window of the picture shown above to determine what range selection is used Speed selection This is to select the JTAG BDM clock speed Even though we normally need high speed to program the target It is needed sometime especially when target is bricked to use slower speed The current hardware allow you t select three JTAG BDM speed Toolbar Going from left to right 11 Open file command line equivalent Idram Save file command line equivalent save Tools gt configuration command line equivalent config Target id de
3. You can uninstall latter but the needed dlls will allow you to run USB JTAG NT software http messenger yahoo com download Update USB JTAG NT software updates quite frequently If there is only minor changes to the software you do not need to download full setup rar Simply download the software an unzip to the directory where the software was installed Default for Windows is C Program Files usbjtag usbjtagnt 2 2 Activation Your activation code is a unique number working with your email address case sensitive and your hardware ID 2 Activation Hardware ID JTAG00000001018 Email Address dctbdm yahoo com Activation Code Email Activate Online Activation 1 When you do not have the code enter email address and click Email Activation and it will popup your email software and send out the email request 2 If you get the code then enter the code manually Make sure the email is right email is case sensitive Click OK when done 3 If you have activate before and you lost your activation code you can enter email address and click Online Activation It will try to get the code from the online database 4 The software does not limit the number of computer you run on You can install as many computers as you like When email to activation Ousbjtag com to request activation please specify the hardware ID in the email 2 3 Install hardware USBJTAG NT The EJTAG connector on the board
4. matches the standard Broadcom 14 pin EJTAG connector PINZ o000000 pooooooo PIN1 Here are the definitions of EJTAG Pinl TRST Pin3 TDI Pin5 TDO Pin7 TMS Pin9 TCK Pinl 1 RESET Pin13 DEBUG Not used Pin 2 4 6 8 10 Ground Pin 14 NC On back of the USB JTAG NT module printed lableis used to indicate pin 1 The preconnected ribbon cable has a red pin indicate pin 1 too If your target does not have the same pinout you need to make a connector to match your target Some board might not have JTAG connector and you need to solder a connector for it 7 a Here is an example for sb5101 cable modem with a JTAG connector soldered on aire AE A EUA gvare0t sans 1 Power off the target board 2 Plug the JTAG connector to the JTAG connector on target board Improper connecting to the target will not work and might kill your target or USB JTAG Connect the USB JTAG into one of the PC s USB slot 4 Power on the target board W USBBDM NT 1 Power off the target board 2 Plug the BDM connector to the BDM connector on target board Make sure pin 1 matches the pin 1 on the target BDM connector Reversing the BDM will cause the BDM to not function properly If this happened power off the target and plug back in 3 Connect the USB BDM one of the PC s USB slot 4 Power on the target board Chapter 3 Using USBJTAG NT software 3 1 Software layout There are two types of layout E
5. normally will take up to 20 40 seconds If after a long time the program does not return something has gone wrong and you need to stop the program and start again Syntax erase tabname erase address length Example ERASE image0 Erase starts Erase time 00 00 08 021 sprogram Slow program This is slow program compared to normal program In EJTAG this method is not used to target ram In EJTAG when the boot is not in setup and the initialization sequence to access ram is unknown sprogram is normally used for program a boot block Make sure the target flash is erased Syntax sprogram tabname sprogram start length Example ERASE boot Erase starts Erase time 00 00 00 031 SPROGRAM boot Program Starts Program time 00 00 08 084 CMPRAM boot Compair data OK program Programs the flash or eeprom If you program the flash make sure you have executed flshdct or detect command The right flash type must be set to the memory Syntax program tabname program address length Example program boot program 9fc00000 200000 program eeprom PROGRAM image0 Erase starts Erase time 00 00 08 071 Program speed 138 26 KB s Program time 00 00 07 081 Program pass if no further programming needed power off on the target bk Breakpoint in the target Normally use this with register view enabled Syntax bk Shortcut F6 r Read registers or set register value to the target Syntax r r regist
6. 0000 200000 Idram Load binary file to PC memory This is opposite to save command Syntax Idram tabname filename Idram address Example ldram boot ldram 9fc00000 cmpram Compare the PC memory with target memory This is very useful especially for programming flash If you use EJTAG you cannot do cmpram right after the programming if non DMA is used The OK means the memory are identical between PC and the target Otherwise the failed address will be displayed Syntax cmpram tabname cmpram address length Example cmpram boot cmpram 9fc00000 200000 setram Opposite to getram this set the target memory from PC This can only be used for ram not for flash For flash you can only use program or sprogram to alter the target memory Syntax setram tabname setram address length Example setram 80000000 200 peek Get one word from target Syntax peek address Example peek 80000000 pokeh Poke two bytes Syntax pokeh address value pokeb Poke one byte Syntax pokeb address value 14 19 20 21 22 23 24 25 26 27 28 29 30 peekh Peek two bytes Syntax peekh address peekb Peek one byte Syntax peekb address poke Set one word to target Syntax poke address value flshlist List all the flash types that are defined in flash def Syntax flshlist config Start configuration dialog to configure the target and view about Display the about dialog box Syntax about cls
7. 5 1 1 What is JTAGs nn a NS A NRE OTN ds a 5 EATI SEN E E A ET 5 1 3 What can be done with USBJTAG NT oooococonoccconococonnnncnnnnnnnnnnncnnnnncnnncncnnncnnonnccnnnnnos 6 1 4 What can be done with USBBDM NT sississetisssc csccdncsneccaseontcdsnevasstacceesscdacesevendinevens 6 Chapter 2 Install USBJTAG NT USBBDM NT ooooccnncniccccoconnconononncononononinonocnnononocncnnoss 6 SU softwa A A AS 6 IN O A E 6 A pe R E hee eaten 7 Chapter 3 Using USBJTAG NT SOftWare oocoocconnnconnonconmonoonnonncnncnnnnncnnonacononanonoonos 8 Sal SoftWare LAU A A E 8 Check th version OF software O ws Oe a a eee 11 COnTISUTE the SOLE WAR eck Mag aii aT ES 11 3 2 GUL Usa iia 11 LS O 11 Specd O O 11 Toolbar nenian an e a E aa 11 O aa aa aaa ere its E 12 Common OAMI AS 12 SASTTAGU renal an oi sans cuca OE olaa rs srt 17 Programi flash neose aces bad erei ie a eden cz EE E one sea ance A NS 17 DA BUSTO daa 18 Chapter 4 SO dad ote 19 A A ea tng e vAcasde ah cau ap wy Daag apn peas aa Ragen E ecto 19 Chapter 1 Basic concept 1 1 What is JTAG Here is the quote from lt lt MIPS EJTAG Specification gt gt EJTAG is a hardware software subsystem that provides comprehensive debugging and performance tuning capabilities to MIPS microprocessors and to system on a chip components having MIPS processor cores It exploits the infrastructure provided by the IEEE 1149 1 JTAG Test Access Port TAP standard to provide an external interface and extends th
8. 904 DMA supported Found Address 9fc00000 Intel 28F160C3B 1 search Search the memory block This is ONLY used for an unknown target and you want to find the memory map Most important to find where the firmware starts For most users this command is not used Syntax search start end step Example SEARCH 90000000 a0000000 200000 Address 90000000 data FFFFFFFF Address 90200000 data FFFFFFFF Address 9E000000 data 0BF00004 Address 9E200000 data 0BF00004 Address 9E400000 data 0BF00004 Address 9E600000 data 0BF00004 Address 9E800000 data 0BF00004 Address 9EA00000 data 0BF00004 Address 9EC00000 data 0BF00004 Address 9EE00000 data 0BF00004 Address 9F000000 data 0BF00004 Address 9F200000 data 0BF00004 Address 9F400000 data 0BF00004 Address 9F600000 data 0BF00004 Address 9F800000 data 0BF00004 Address 9FA00000 data O0BF00004 Address 9FC00000 data 0BF00004 Address 9FE00000 data 0BF00004 By further analyzing the firmware we can then figure out that the firmware starts at 9fc00000 For MIPS CPU they also maps as 1fc00000 or Bfc00000 flshdct Detect the flash type Syntax flshdct tabname flshdct address Example flshdct boot Found Address 9fc00000 Intel 28F160C3B f1shdct 9fc00000 Found Address 9fc00000 Intel 28F160C3B flshset Set a flash type to the tab This is used when the target is complete dead and normal rescue method cannot be used Sy
9. Clear the screen Syntax cls e Edit data in PC memory To update to the target ram or flash you need to use setram or program commands Syntax e address datal data 2 Example e 9fc08000 11 22 33 44 f Fill data in PC memory To update the target ram or flash you need to use setram or program commands Syntax f tabname value f start length value Example f bootff f 9fc00000 200000 ff s Search patterns in PC memory Syntax s tabname string s tabname datal data2 s start length string s start length datal data2 Example s imagel SB5100 s imagel 40 08 80 s 9fd00000 100000 SB5100 s 9fd00000 100000 40 08 80 configshow Show all the configuration Syntax configshow Example CONFIGSHOW Test name SB5100 Test DLL SB5100 d11 IRLength 5 Endian Big Boot Flash Intel 28F160C3B cfg Flash Intel 28F160C3B Image0 Flash Intel 28F160C3B Imagel Flash Intel 28F160C3B log Flash Intel 28F160C3B erase Erase the flash The erase command is used with sprogram Normal program command auto erase the flash This command is only used when normal 15 31 32 33 34 program command does not work ST20 target must use erase sprogram to program the flash Please note that the erase command does not have feedback while erasing And normally erase take quite a long time A 2M flash s erase
10. NG BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT LIABILITY OR TORT INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE Copyright c Auther USB BDM www usbjtag com All rights reserved Terms In this document target or target board refers to any device that has MIPS ST20 ARM in the future core CPU Eg Broadcom LSI etc USB JTAG and USB EJTAG are both used for USB JTAG device EJTAG is the JTAG name for MIPS core DCU is the JTAG name for ST20 core For USBBDM NT hardware target or target board refers to any device that has Motorola CPU like MC6833x Only power on the JTAG or BDM and the target AFTER the JTAG or BDM and the target are connected Connecting the JTAG or BDM and the target with either of their power on could burn either the JTAG or BDM or the target Warranty For normal usage the devices can last very long But since this is testing device and you are making contact to another powered device there is a risk that hardware might get burnt out The devices offer three months free repair After three months a small fee needs to repair the USB JTAG NT or USB BDM NT Warranty voided 1f covered is removed TABLE OF CONTENTS Disclaimer ei dio A ion 2 Chapter 1 Basic concep aia
11. User Manual for USBJTAG NT September 2010 0 42 Preface Disclaimer The information in this document is subject to change without notice The manufacture makes no representations or warranties with respect to contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose The manufacture reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of the manufacturer to notify any person of such revision or changes Use USBJTAG NT at your own risk Nothing is implied outside this document The manufacture is not responsive for any damage using the USBJTAG NTsoftware and hardware USB JTAG NT is not freeware It is not based on any freeware It must only be used on products purchased on www usbjtag com or its dealer If you are not sure your product is from this site please send email to usbbdm usbjtag com If you use clone hardware do not use this software Do not use the software hardware if you do not agree the terms THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL DAMAGES INCLUDI
12. e MIPS instruction set and privileged resource architectures to provide a standard software architecture for integrated system debugging USB JTAG now support ST20 core from STMicroelectronics Arm Arm 9 support is on the plan SPI programming are also supported USB JTAG NT software runs on Microsoft Windows system The tested OS are Windows XP Windows 2000 Windows Vista 32 bit Vista 64 bit Windows 98 should be supported but have not been tested In Aug 2010 all code are ported to new platform and soon Linux and Mac will be supported This document will also be updated USBJTAG NT is the second generation of USBJTAG developed by www usbjtag com It uses USB 2 0 technology and it supports a wider range of CPU and provides even faster speed than earlier version of USBJTAG which runs on USB 1 1 1 2 What is BDM BDM stands for Background Debugging Mode Here is the pin layout of 10 pin BDM BERR w y J a Ns ro GND 30 O BKPTDSOLK GND 50 O6 FREEZE HESET 70 O8 FETCHDS Yop 90 O10 PIPEDSO e a For detailed BDM information please refer to chapter 5 of MC68331Ref pdf USBJBDM NT is the second generation of USBBDM developed by www usbjtag com It uses USB 2 0 technology and it supports a wider range of CPU and provides even faster speed than earlier version of USBJTAG which runs on USB 1 1 USB JTAG NT 0 40 now also support old USB BDM There is no activation needed for old USB BDM 1 3 What can be done wi
13. er value Example r rl 8000200 16 35 t Single step Not for EJTAG64 Syntax t Shortcut F10 36 g Execute in full speed Syntax g Shortcut F5 37 tap Send tap command to the device Used for de bricking MIPS device Syntax tap x y Example tap c tap a ffffffff 38 blkchk Check if the flash is blanked If the result is not blanked do not try to use sprogram Syntax blkchk tabname blkchk start length Example blkchk flash Flash blanked 39 flshdcth This happens on IRD6000 dish receiver while there were two flash chip and one hold the high word of data and another flash hold lower word of data flshcdth uses different routine to detect the flash In the usbjtag def the Protocol DCU and HiLo 1 If not the flshdcth will not get the right result Syntax flshdcth tabname 40 hdramh This is the same reason as for flshdcth When file saved in high word or lower word You can use Idramh command to only load to high word or lower word of the memory in pc Syntax Idram address Example ldramh 7 c00000 lower word file ldramh 7 c00002 high word file 41 speed Select JTAG speed speed 2 select 3MHz JTAG or 1 5MHz BDM 3 4 JTAG Usage 1 Read memory Use getram command Eg getram u22 2 Write memory Use setram command Eg setram nvram Program flash The flash contains all the essential programs for your target to work properly Therefore it is ve
14. n using scripts So if you find a bug or want to make an enhancement request do not hesitate to write to me The support forum can also be used www usbjtag com vbforum 18 Chapter 4 Script USB JTAG NT support very complicated script so it can automate a lot of the jobs 4 1 Basic script Basic script does not use controls and only have commands Here is an example of basic Script Gl0la usp dee e e e de e e dede dee fede de de de de de de de de a sb5100 restore script detect Idram 9fc00000 1 echo Press enter to program any other character with return exit the script pause program 9fc00000 200000 In the command window you type in b5101a backup1 bin Which the script will take one parameter as backup1 bin Here is the explanation of script de de de de dete dete These lines only displays the output to screen Echo does the same thing but will not display Echo detect Execute command detect Idram 9fc00000 1 Equivalent to Tdram 9fc00000 backup bin echo Press enter to program any other character with return exit the script Display a prompt pause Pause for you to hit Enter You can enter any character and Enter to exit the script program 9fc00000 200000 Do the programming 19
15. nable register view when configuring Register view provides the information of the registers during debugging Register view only support EJTAG32 EJTAG64 and BDM Category Target select CableBox IDc105com1 C Register view C auto Script Script Directory EN ProjTmpf QMS debug script USB JTAG NT 0 42a http Avww usbjtag com Testing SB5101 Not Activated File Tools 585100 Testing Help GA py i j Dl vy ces a DO E Upgrade tutorial V2 by FEROSA Mj Copyright Cc zor 20112012 A pSOhack_dump_telnet Lin Flashpi dll Target 585101 JTAG speed Readme txt M lect sb5101 firmware upgrade tutorial v2 bs Tool bar emory rang sele sb5101 mod 10 2 by Fercs bi 5B5101 Mod 10 2 by FERCSA zi GORE 8 20 2009 8 13 22 PM File browsing Directory Output Window Memory tab Output Ram Boot cfa Imaae0 Imagel log Info about the selected file Command Window Progress bar USE status DEBUG STatus of Normal view 1 ede A Title bar show USBJTAG NT and the test module used If you plug USB JTAG NT in you must see it is activated Otherwise it will not work Command window bottom window accept your commands Output Window middle window prints the result of the execution of commands Memory tabs can be configured in target xml file in config directory Connect status in the bottom bar indicates the USB JTAG to PC connect state during the
16. ntax flshdct tabname valuel value2 Valuel and value2 will be the same value otherwise flshdct is used Manufacture ID and chip ID Example FLSHSET boot 89 8891 Found Address 9fc00000 Intel 28F160C3B configshow Test name SB5100 Test DLL SB5100 d11 IRLength 5 Endian Big Boot Flash Intel 28F160C3B cfg Flash Intel 28F160C3B Image0 Flash Intel 28F160C3B 186 11 12 13 14 15 16 Kz 18 Imagel Flash Intel 28F160C3B log Flash Intel 28F160C3B init This is to initialize the target in dll or in xml initusb Initialize the USB PORT This will trigger USB PORT to reinitialize the USB JTAG It might take several seconds to get back JTAG connected state Syntax initusb getram Read memory from target to PC This is lengthy operation and the progress bar will show roughly where you are After completion of the memory read the memory in the tabs will be updated You can view and edit the memory in the memory tabs Be careful when editing the memory map since most flash firmware have complicated checksum to avoid data corruption simply editing the firmware and programming it back might not work Syntax getram tab getram start length Example getram boot getram 9fc00000 200000 save Save the PC memory to a file The default file extension is bin Syntax save tabname save start length Example save boot save 9 c0
17. running of the software you can unplug plug the USB connector to PC When JTAG is not connected no command can be send to the target CPU DEBUG state should be monitored carefully During memory access DEBUG should be off DEBUG ON is only used for programming flash It is very important to make sure that any watchdog is disabled so flash can be programmed properly If you are not sure about this DO NOT PORGRAM the flash 7 TRAP ON is used to tell if we can access target memory and program the flash Progress bar is used for some lengthy operation like read write memory or program flash 9 File browser can be used to drag the file to memory tab oo USB JTAG NT 0 42a http Avww usbjtag com Testing SB5101 Not Activated File Tools 585100 Testing Help 4 B Gs D a a B Be e Range 112000000Hz arcosooo e upgrade tutorial Y2 by FERCSA CJ SFc08010 AOS 9FC08020 250hack dump telnet bin 9FC08030 flashpi dll arcoso40 Readme txt o sbS101 firmware upgrade tutorial v2 by secqgaza sb5101 mod 10 2 by fercsa bin 9FCOS080 585101 Mod 10 2 by FERCSA zip 9FCOS090 9FCOSOAD 9FCOSOBO 9FCOSOCO 9FCOSoDO 9FCOSDEO SFCOSOFO 9FCos100 9Fcos110 9Fcos120 9FCOS130 9FC08140 9FCos150 9FCos160 9FCos170 9FC08180 9FC08190 SFCOS1A0 9FCOS1B0 9FCOS1CO 9FCOS1D0 SFCOS1E0 SFCOS1FO Read from chip F2 z Opat J Ram J Poot Lefa Verify data F3 sentio Erase chip
18. ry important to understand the process of programming flash In most case you can burn flash in fast mode But if the flash is accidentally erased and no initialization is known then a slow mode is used First you need to make sure that watchdog is disabled For known board with proper initialization a detect command will both detect the CPU and initialize the target IT 17 IS VERY IMPORTANT EACH TIME TARGET IS PLUGGED IN A DETECT needs to be executed Fl is the short cut key EJTAG only If it is the first time you program the flash type the command bk this command puts the CPU in DEBUG ON mode Please do nothing for at least 30 seconds If debug on stays then the watch dog is disabled and you can program the flash safely You only need to do this once for each type of target If DEBUG goes off then the watchdog is not disabled and program the flash is unsafe Before you do some real programming make sure the data is valid bk is break command and g is run to normal command You can then program the flash by typing the command program tabname or program start length It is highly recommend the first time find a non used sector to program and compare to make sure you have can program properly 3 4 Bug report Please report bug to usbbdm usbjtag com Since there are so many targets out there and people use them in different way there will be bugs in the software Especially whe
19. tection command line equivalent detect Read command line equivalent getram Verify command line equivalent cmpram Erase flash EEPROM command line equivalent erase Program flash command line equivalent program sprogram Connection Show how to connect the target About Copyright info 3 3 Commands USB EJTAG NT software is command driven In command window typing help will give you all the command available Type help and then a command will give you details of that command Up Down arrow keys can be used to go through the command history in the command window Common commands 1 d Display the address Syntax d address in hexadecimal Example d 9 c80000 2 exit Exit the whole application Syntax exit 3 help prints command help Syntax help This will print all the command names Syntax help cmd This will print the usage of the cmd Example help flshdct 4 reset Reset the target Syntax reset Note Not all the target board has the reset pin connected to JTAG port and even if the JTAG pin is connected to the JTAG port the reset command might not reset the target for some other reasons If this happened a power off on will do the same work as reset 5 detect Detect the target CPU and possible flash types If there are memory tabs defined as flash then a flash detect command is also issued Syntax detect Shortcut F1 Example sb5101 detect IDCODE 334917F Broadcom BCM3349 IMPCODE 800
20. th USBJTAG NT USB JTAG provides an affordable yet powerful enough tool to have most functions that a professional JTAG tool can provide It allows you to 1 Read memory from target board 2 Write memory to target board 3 Program flash using target CPU and memory 4 Do simple debugging Break and single step the target in its execution MIPS32 only for now In the future it is possible to attach to GNU debugger More debug functions will be added in the future 1 4 What can be done with USBBDM NT USB BDM provides an affordable yet powerful enough tool to have most functions that a professional BDM tool can provide It allow you to 1 View the registers of the target CPU 2 Single step the target CPU 3 Get memory from target board 4 Set memory to target board 5 Program flash using target CPU and memory Chapter 2 Install USBJTAG NT USBBDM NT 2 1 Setup software First time installation Download the setup rar file from www usbjtag com extract the setup exe file and run it Plug in the USB when it ask for driver select automatic and click OK For Vista 64 bit download the 64 bit driver from www usbjtag com and browse and select the inf file If you are asked for missing files download from Microsoft site and install http www microsoft com downloads en details aspx FamilyID 200b2fd9 aela 4a14 984d 389c36f85647 amp DisplayLang en If it still not working a small trick is to download and install yahoo messenger
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