VDV21 JTAG and unlock. Page 2

VDV21 JTAG and unlock. Page 2
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usbjtag @ 30th Oct 12:03AM:
Re: VDV21 JTAG and unlock.

If you use serial hit "p' at boot up within 3 seconds.
Then read following address
bfbd00f8 bfbd00fC bfbd0100
You will be able to get Admin password.
The length of password is one byte at bfbd00fa. Then followed plane text ASCII password.
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usbjtag @ 30th Oct 01:36AM:
Re: VDV21 JTAG and unlock.

Finally I can enable both port of this device.
The current method is similar to VT2X42. Use JTAG to erase hash and Keys (both factory and dynamic non-vol).
Use serial port to add user id and password. The TFTP method does not work yet.
This device now have TWO port with call ID. A very nice toy.
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meister_sd @ 2nd Nov 10:27AM:
Re: VDV21 JTAG and unlock.

What value resisters did you use?

Seems you had to add R53, R51 and R56.
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usbjtag @ 2nd Nov 10:41AM:
Re: VDV21 JTAG and unlock.

In theory this box can be unlocked without JTAG but someone need to write the assembly code to do so.
The bootblock allows you to use serial port to run your own code in ram. You can write code to write legit non-vol and remove the keys. You then can be able to use console command to add your SIP information.

Since I am only interested in unlocking with JTAG, I will not be interested in writing code to unlock with serial port. If anyone one want to do the serial port unlocking, I can provide information how to program both dynamic and perm non-vol to remove the keys.
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