Suggestions on How can I dump this?

[carlitosdasilva520]

Hello, I have this board. Any suggestions on How can I dump this?
I know is CAK7 but I don't know how to extract the keys since the board don't have flash.
I already tried UART, but only one line appears (I also attached a photo).

 

[manguenda]

Have you tried using jtag?

 

[Spectre]

Have you tried using jtag?

That 10 pin header looks like it could be a JTAG port.

 

[manguenda]

That 10 pin header looks like it could be a JTAG port.

I also think because stb looks old

 

[cak7]

old box but very safe system, because you can't get any datasheet of CPU, forget and not waste time with money.

 

[manguenda]

There is always a way

I'm pretty sure that JTAG works

 

[Benfica200]

There is always a way

I'm pretty sure that JTAG works

Waste time because your not know if this is arm, mips, sh, arc, etc etc...

 

[August12]

There is still a way if the Box have Usb Port and if there is Possible to Update Firmware Over USB maybe that way can be Dumped

There was someone where it worked Command Injection in Vivax Set-Top Box via USB upgrade

 

[August12]

i searched litte bit about that Chip and came Across this definition COS
so Looked what is COS mean
This Receiver have no Card Slot ???
Because the Chip is the CARD

maybe you can try some of the Commands for COS Smartcards

LogoSec - Chipkarten / Smartcards

COS is Mean Native Chip Operation System

More info Here http://downloads.acs.com.hk/technology/483-04-native-chip-operating-system.pdf