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Old 15-04-2008   #1
mhku
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My System: DM7020S ~ DM500s ~ sg2100 ~ Gemini


If he were not a wizard, from head down to the root, you would have got to worry-your DB only boots
Exclamation Dreambox 500 - JTAG Information

In case this got missed within the other thread, here are a bootloader and JTAG diagrams that you may find useful if you have a clone and Gemini 4.31.

You can download a bootloader here:

_http://rapidshare.com/files/87512303/dreamboxbootloader.rar.html

PCB pins:

Signal Pin Pin Signal

TDO 1 2 N/C
TDI 3 4 TRST
N/C 5 6 VCCS
TCK 7 8 N/C
TMS 9 10 N/C
HALT 11 12 N/C
N/C 13 14 ***
N/C 15 16 GND
db25 . . decoder

The cable (DB25 = printer port connector):

DB25 > resistor > PCB pin

2 --> 100 ohms --> 11 ( Halt)
3 --> 100 ohms --> 9 ( Tms )
4 --> 100 ohms --> 7 ( Tck )
5 --> 100 ohms --> 3 ( Tdi )
11 --> 100 ohms --> 1 ( Tdo )
25 ------------------ 16 ( Ground)

You may also be able to use a CAS2 or CAS3 to jtag it. Use at your own risk.

I haven't tested it and you should contact your seller to obtain a refund if possible.

Updated 21.04.08:

These files have been tested by philip633

_http://rapidshare.com/files/109184199/bootloader.rar.html

JTAG program
BIN file
MAC generator

See here for more details:

http://www.satellites.co.uk/satellit...tml#post736304
Attached Thumbnails
Dreambox 500 - JTAG Information-jtag2gz4-jpg   Dreambox 500 - JTAG Information-dreambox-500-jtag-information-jpg  


You don't stop playing because you get old, you get old because you stop playing. Regras
Before posting in the Dreambox section please ensure you've read The Guide


Information is for educational purposes only


Last edited by mhku; 21-04-2008 at 11:25 AM.
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