xboxscene.org forums

Author Topic: Jtag Saver V1.0 & Cygnos V2  (Read 201 times)

Skevus

  • Archived User
  • Jr. Member
  • *
  • Posts: 56
Jtag Saver V1.0 & Cygnos V2
« on: March 25, 2010, 04:05:00 PM »

Do I really need this when using Cygnos 2?

I didn't touch the original NAND. I have XBReebot on The Cygnos 2 chip, always having it on to start the hacked dahsboard.

Would this even work for me since I have the latest firmware on the Cygnos and don't need any extra resistors or diods. Don't the cygnos have any safety measures?

Somebody please tell me, and I have a Jasper with 16 MB NAND if that matters....
Logged

MrFlooD

  • Archived User
  • Newbie
  • *
  • Posts: 39
Jtag Saver V1.0 & Cygnos V2
« Reply #1 on: March 25, 2010, 06:12:00 PM »

The Jtag saver is voodoo modding. There is no proof the Jtag hurts consoles, so no need for the Jtag Saver.

That said, you also don't need it for the Cygnos.
Logged

thethinker360

  • Archived User
  • Newbie
  • *
  • Posts: 49
Jtag Saver V1.0 & Cygnos V2
« Reply #2 on: March 26, 2010, 08:06:00 AM »

especially on the Cygnos V2 you do NOT need it.

the cygnos guys had warned a couple of times that the other Jtag methods were "unclean" and the voltages aplied via diodes or resistors were not clean enough and mitgh cause damage. the Cygnos method is 100% clean as the voltages are managed by the cygnos firmware / microcontroler! so a cygnos has this "jtag Saver" built in anyway
Logged

Skevus

  • Archived User
  • Jr. Member
  • *
  • Posts: 56
Jtag Saver V1.0 & Cygnos V2
« Reply #3 on: March 26, 2010, 11:23:00 AM »

QUOTE(thethinker360 @ Mar 26 2010, 03:06 PM) View Post

especially on the Cygnos V2 you do NOT need it.

the cygnos guys had warned a couple of times that the other Jtag methods were "unclean" and the voltages aplied via diodes or resistors were not clean enough and mitgh cause damage. the Cygnos method is 100% clean as the voltages are managed by the cygnos firmware / microcontroler! so a cygnos has this "jtag Saver" built in anyway


Thanks, It was something like this I thought that the cygnos had and why I asked so I didn't break something or put in alot of work into it without any positive changes to my 360.

It was the reason I used Cygnos in the first place so I didn't need to touch the original Kernell. It is mutch easyer to flash the original NAND then to install a Cygnos Version 2.

It's a shame the Revision F Cygnos V2 for 256/512 Jasper don't have it's  own memory and you are forced to flash the original NAND. I presume it's quite safe but I don't really understand what you are paying for in Revision F since you still have to flash the original NAND. So in a way Revision F is just a glorified USB NAND Flasher that you can only use with one 360. All other USB NAND flashers you are able to reuse when you are done.

I didn't hear anything about any price cuts and I find it rather expensiv if the price is the same for Revision F as it was for Revision E. Especially With Executers new NAND X witch is cheaper and mutch easyer to reuse.

I did use a Cygnos V2 on a Jasper that had an early Kernell but was impossible to JTAG. I tried to desolder the Cygnos but I gave up when I found out I was breaking both the Cygnos and the 360 with the solder equipment I used. You need some really good equipment to desolder a Cygnos V2. So that is pretty why they aren't reusable. The Revision F have even more of those hard to desolder points. And you are quite scrued if you didn't use cables for those points from the start....
Logged

thethinker360

  • Archived User
  • Newbie
  • *
  • Posts: 49
Jtag Saver V1.0 & Cygnos V2
« Reply #4 on: April 16, 2010, 07:57:00 AM »

revision F adds JTAG quicksolders, it does NOT have more wires. you either didt research or said this on purpose, no idea. its availabe for 49 USD now. reason for leaving the secondary NAND is obvious.

you CANNOT make it universal, there are 6 or so NAND types out there. how are you suppose to fit them?

in addition. a 512Mb nand does not cost 1 dollar... i doubt you would want to pay for the 512Mb chip on there and you dont want to own a shop having to stock a different cygnos model for each NAND type...

on the 16Mb one thats easy, there was only the HY someting from hynix.

besides, you get the best software (toolbox) for flashing. you not only buy a hardware.

so have you desoldered a nand-x? i doubt it.
Logged

Copter64

  • Archived User
  • Jr. Member
  • *
  • Posts: 75
Jtag Saver V1.0 & Cygnos V2
« Reply #5 on: April 17, 2010, 10:21:00 AM »

Just make sure you are using diodes.... there is no way for voltage to go through and fry the jtag.  Don't use the resistors only..... 330Ohm will work but no telling for how long.
Logged

thethinker360

  • Archived User
  • Newbie
  • *
  • Posts: 49
Jtag Saver V1.0 & Cygnos V2
« Reply #6 on: April 21, 2010, 03:07:00 AM »

if you put the diodes in the wrong way around you can...
Logged