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How to JTAG a DM500

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 Old 21st April, 2008, 07:13 AM   9 links from elsewhere to this Post. Click to view. #1
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Default How to JTAG a DM500


There's now a guide, pictures and all the tools you need to JTAG your DM500.

You will need these tools if your clone has been zapped by the Gemini 4.3.1 image.

Untested by myself, don't use Gemini .

Njoy!

How to JTAG a DM500

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File Type: jpg dm500_jtag_pins.jpg (38.1 KB, 492 views)
File Type: jpg jtag.JPG (35.6 KB, 436 views)
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Last edited by Devilfish; 17th September, 2009 at 10:14 AM.
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 Old 22nd April, 2008, 01:00 AM   #2
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hi

all works fins but when i click on write the program quits and nothing happens ? any idea why is it doing that ?
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 Old 22nd April, 2008, 08:07 AM   #3
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The connections are:

LPT————–> Dreambox/Clone

2 –> 100 ohms –> 11 ( Halt)

3 –> 100 ohms –> 9 ( Tms )

4 –> 100 ohms –> 7 ( Tck )

5 –> 100 ohms –> 3 ( Tdi )

11 –> 100 ohms –> 1 ( Tdo )

25 —————— 16 ( Ground)

Th pins 18, 19, 20, 21, 22, 23, 24 e 25 of the port LPT must be shunted between themselves, like commercial jtags has.
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 Old 23rd April, 2008, 01:07 AM   #4
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all the connections are correct usinf 100 ohm program connects fine and indentify cpu and flash ,but still when i click on write ,the program quits and nothing is written to the dm500 .what could be the problem ?
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 Old 23rd April, 2008, 04:55 AM   #5
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hello,

that's it what i need. i hope it will work because it's my firsttime.

thx
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 Old 23rd April, 2008, 08:21 AM   #6
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Hello,
Problem with "Conect"
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 Old 23rd April, 2008, 02:49 PM   #7
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Default Jtag error

Keep getting an error every time I run the loader.
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 Old 23rd April, 2008, 03:11 PM   #8
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nothing ...... it disapears after few seconds and dont write the flash right ....
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 Old 23rd April, 2008, 11:29 PM   #9
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yes .it disapear after i click on write
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 Old 24th April, 2008, 01:52 PM   #10
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have someone testit and dm itis a live pm me thanx
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 Old 24th April, 2008, 01:53 PM   #11
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Default hi again

i want to make jtag with lpt can someone help me pls
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 Old 24th April, 2008, 07:36 PM   #12
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Hi all,

Does this jtag work ?
It seems a though no one has been able to get it working successfully !!

What is the scoop on it ?

Regards
jr
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 Old 24th April, 2008, 07:43 PM   #13
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unfortunately it's a grey area. no-one is going to brick their box on purpose just so they can try and JTAG it.

If you have a dead box then you are simply going to have to persevere and hopefully you'll be a mentor to others.
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 Old 24th April, 2008, 07:59 PM   #14
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waiting for a jtag lead from tailor made circuits then i will try it myself,hopefully will be here tomorrow
in the meantime i ordered a 600pvr
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 Old 25th April, 2008, 10:03 AM   #15
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I tryed all kinds of jtag..No luck at all...
But..take a look at this ..h**p://www.dreamboxrepair.com
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