The following screen shots and text were put
SIGMA X2 Build 125
There are 2 methods to flash this image onto
your 200, the first is via a Blackcat cable (JTAG).
If you are familiar with JTAG/Blackcat then you
need no detailed instruction as you should already
know what you are doing. Just write the included
sigmax2_125_cracked_dump.bin file onto the flash
using the 'Write All' function in SchwarzeKatze.
The other method is by using a serial connection
and a max232/3 interface; this method will be
ALERT: If you already have the older SigmaX on
your 200 and have no JTAG interface then you cannot
flash this image onto your modem. Even the Sigma
bootloader that allows flashing is buggy, if you
try to use this Sigma flash menu you will brick the
modem. Look at the end of this tutorial for a way
to restore a compatible bootloader so you may flash
the new image correctly.
Flashing the SIGMAX2 image onto the 200
Connect your modem to your PC using a MAX232/3
Connect the modem to the PC via an Ethernet
In Windows Networking set the network adaptor
connected to the modem to a manual configuration
with these details:
<don't enter anything>
Open up HyperTerminal or Tera Term using the
Now power up the modem and
press 'p' in
the terminal window quickly.
for the Board IP Address, just press return for the
After entering this data you should be presented
with the flash menu.
At this point, start the tftpd32 program that
came with this archive.
Make sure that
is present in the Server Interfaces box.
My example shows the Current Directory as
C:\temp but of course this is only an example,
don't take it literally. Make sure the Current
Directory is set to the same place you extracted
this archive. You have to click the Settings button
to change this.
Now select 'd' from the menu options in the
terminal window and enter 192.168.100.10 for the
Board TFTP Server IP Address and
for the TFTP filename.
The modem should now read the firmware image.
You will be informed that the image does not have a
standard header and asked if you still want to
store it. Reply with
You will then be asked the sector at which to
start the store.
It will then start to flash the chip with the
new firmware. When it's finished, it will ask you
to store parameters to flash,
You will then be returned to the main menu. You
may now reboot the modem. The new Sigma firmware
should start to boot. Lots of data will flash past
you on the terminal until you reach the scanning
At this point you may now start to enter the
settings for your area. Firstly however, you should
stop the channel scan to make it easier to see what
you are doing. To do this type in the following
The channel scan should then stop. Now, enter
aa:bb:cc:dd:ee:ff (change this to a valid
cm_annex 3 (pure
NTL areas ONLY should enter this)
402750000 (change this your area's DS
If you want to force the 10Mbit configuration
file (which you probably do) then enter the web
configuration page ( http://192.168.100.1:1337/ )
and enter cmreg-ntlhm120-bund03.cm into the Config
name: box and click the change box next to it.
You can enable telnet using this interface too,
as well as change the MAC address or change the
firmware. If you enable telnet, make sure you
change the username and password.
Now commit these changes to flash by entering
the single command:
That's it! Reboot the modem and you should be
all up and running.
PS. If the modem ever stops working, you can
clear it by entering these commands.