DCH box testing soon.
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Yes, TD lines basically just look like a long shift register.
if you want to get 8 bits out of a generic single shift register, you just shift 8 in. if you daisy chain 2, 8 bit shift registers and want to get 8 bits out of the first one, you have to shift 16 bits, thats what he is saying. If there was a device in front of the BCM and he doesnt know about it, he will never shift all the bits out w/o adding the additional device's register length to the TCK count.
if you want to get 8 bits out of a generic single shift register, you just shift 8 in. if you daisy chain 2, 8 bit shift registers and want to get 8 bits out of the first one, you have to shift 16 bits, thats what he is saying. If there was a device in front of the BCM and he doesnt know about it, he will never shift all the bits out w/o adding the additional device's register length to the TCK count.
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First thing I will do is to find out the IR length of DCH70 and then write a slower version of EJTAG that will allow JTAG TDO/TDI to be chained. Then it will be the same as DCT2500 to read and programming.
As far as the XC chip, it is in the card now and there is MC68331 CPU talks to the XC chip. To access the CPU on the card we need to use BDM to talk to it.
As far as the XC chip, it is in the card now and there is MC68331 CPU talks to the XC chip. To access the CPU on the card we need to use BDM to talk to it.
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So the DCT2500's XC chip should be a easier nut to crack?usbbdm wrote:First thing I will do is to find out the IR length of DCH70 and then write a slower version of EJTAG that will allow JTAG TDO/TDI to be chained. Then it will be the same as DCT2500 to read and programming.
As far as the XC chip, it is in the card now and there is MC68331 CPU talks to the XC chip. To access the CPU on the card we need to use BDM to talk to it.
Let's Share Info & Crack the XC Together
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I was looking at dch-3200. How do you remove the black security clip on the back? I want to open'er up. What kind of bit are those screws?sphinx wrote:I just opened my DCH3200 and took pictures. Since they are so large, I have put them in a zip. There are a few spots that look like jtag ports, but they are filled in with solder already.
Here are 2 mirrors for it:
http://www.sendspace.com/file/5llg8t
http://www.mediafire.com/?sharekey=e506 ... b9a8902bda
I will upload DCH3416 next.
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Hisphinx wrote:I just opened my DCH3200 and took pictures. Since they are so large, I have put them in a zip. There are a few spots that look like jtag ports, but they are filled in with solder already.
Here are 2 mirrors for it:
http://www.sendspace.com/file/5llg8t
http://www.mediafire.com/?sharekey=e506 ... b9a8902bda
I will upload DCH3416 next.
just got a dch3200 today and was wondering if you made any progress with your box?
Were you able to find the jtag pins?
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dch 70 rumor
There is a rumor that the dch-70 are working with out having to put a filter. If true means someone was able to program something. Im gonna try to get one so we can really find out how it was made.
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