Netgear CMD31T - any hope? - Printable Version

Netgear CMD31T - any hope? - Printable Version

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RE: Netgear CMD31T - any hope? - theinfiniti - 30-12-2013

(29-12-2013, 09:41 AM)teddyalmonds Wrote: The Flashcat bootleg on eBay right now goes for $20 so maybe you could purchase one of them when you can afford to later on? As for the clip, I completely understand.

I saw it, decided to search for blackcat on ebay and saw it for $19. I'd think buyincoins should have something similar though.

Also, arduino: http://www.flashrom.org/Serprog/Arduino_flasher

RE: Netgear CMD31T - any hope? - daviddds - 31-12-2013

I have to wonder if a board like this would work with the flashcat/blackcat, http://www.ebay.com/itm/AVR-AT90USB162-USB-Dongle-Board-Replace-ATmega32U4-for-Game-Software-Encryption-/281183091904?pt=LH_DefaultDomain_0&hash=item4177d17cc0

It's an AT90USB162, the flashcat uses an AT90USB162 as described here http://blackcatusbjtag.com/

It seems like all you would have to do is load the .hex files onto the stick and figure out what pins are used on the blackcatusb, im pretty sure they used the following: SCLK= = PB1, MOSI = PB2, MISO = PB3, not sure what they used for CS though...

I think I'm going to order the board I linked and see if I can get it working with the blackcatusb firmware.

RE: Netgear CMD31T - any hope? - teddyalmonds - 31-12-2013

Yes that board will work. The thing is, you'll have to solder wires to the appropriate pads based on the pinout of the AT90USB162 for proper i/o. There may be an issue with the 5v. I saw that some people decided to cut the 5v line on the incoming usb and power the dongle externally to switch between 5v an 3.3.

If it's an adventure that you want to pursue then it's certainly cheap. If you don't want to bother with that shit, I'd say spend the $20 and get a board already done with the 3.3/5v toggle, all the headers already implemented and be done with it.

RE: Netgear CMD31T - any hope? - theinfiniti - 31-12-2013

All right everyone, I will attempt to make all necessary connections and at least dump the ROM through my arduino either later today or tomorrow. If it fails, I'll attempt with a raspberry pi or eventually just get that flashcat clone off of eBay.

RE: Netgear CMD31T - any hope? - daviddds - 31-12-2013

you make a good point teddy, I see the $20 blackcat jtag on ebay has a USB hub and USB to serial adapter built in...pretty good deal!

yeah, that's another problem with that board i linked, you need to use a external 3v3 source or level converters if you don't want to risk screwing something up with 5v when the flash has a vcc max of 3.3v. kinda makes saving the 12 dollars or whatever not worth the effort.

RE: Netgear CMD31T - any hope? - teddyalmonds - 01-01-2014

I totally agree. We all know every dollar counts but time is money too. I think it's only worth doing the modification if you already happen to have a teensy type board or any left over ps groove type thing.

I'm sort of lazy. I'd rather just have the tools I have prepped the first time and not worry about it. Again, for anyone else reading this -- do yourself a favor and get a decent soic clip. Soldering to the pins is easy but if I can eliminate a step and still do the same job, I'm all for it.

RE: Netgear CMD31T - any hope? - theinfiniti - 02-01-2014

OK guys, I was looking at the 8 pin connector next to the SPI chip on the router and I've done a pinout for it. 2 pins don't appear to go anywhere. Is that correct? Here's what I've come up with, based on http://www.spansion.com/Support/Datasheets/S25FL064P_00.pdf and my multimeter:

[Image: EJBNE1p.jpg]

It is the connector without any pins soldered to it (yet!)
[Image: orO9mDz.jpg]

RE: Netgear CMD31T - any hope? - neo_ - 03-01-2014

DNC = do not connect.

[Image: 1ezf.png]

RE: Netgear CMD31T - any hope? - aRcTiC - 03-01-2014

Same 8mb spansion flash chip just like the 6120s. Have one running fw 1.2 and its very stable with its 64mb ram.

RE: Netgear CMD31T - any hope? - theinfiniti - 03-01-2014

(03-01-2014, 01:21 AM)neo_ Wrote: DNC = do not connect.

I know, but I only need the 6 pins I've identified to flash, right? Especially following this: http://flashrom.org/RaspberryPi