Messages

1

Hardware / Re: HOW TO

07. Sep 2008, 22:02

I'd try downloading again (if you haven't already)....that fixed it for me, and I had exactly the same issue.

Chris

2

Hardware / Re: HOW TO

07. Sep 2008, 12:13

You were right! 

Thanks for the hint about FoxIt...sems much quicker than Acrobat.

Chris

3

Hardware / Re: HOW TO

07. Sep 2008, 11:55

try foxit reader  less bulky than acrobat...

It crashes FoxIt 2.3

Chris

4

Hardware / Re: HOW TO

06. Sep 2008, 20:36

Acrobat reports an error when trying to display the photo under "installing the modchip" heading.  I tried both 7 and 8.1 both reported the same error (insufficient data for image).

Chris

5

Hardware / Re: Philips DIT9719 (BT Vision) bootloader dumped :)

06. Sep 2008, 19:50

RAM:93632C78 Main_Entry_Point:                        # Memory reference trap address low bits

Thanks,  that's what I wanted to know! 

However, analysis (even on your dump) stops after a few lines?? 

RAM:93632C78                 mtc0    $0, WatchLo      # Memory reference trap address low bits
RAM:93632C7C                 mtc0    $0, WatchHi      # Memory reference trap address high bits
RAM:93632C80                 mtc0    $0, Count        # Timer Count
RAM:93632C84                 li      $t0, 0xFFFFFFFF
RAM:93632C88                 mtc0    $t0, Compare     # Timer Compare
RAM:93632C8C                 mtc0    $0, Cause        # Cause of last exception
RAM:93632C90                 mtc0    $0, Config       # Configuration register
RAM:93632C94                 li      $k0, 0xA006F010
RAM:93632C9C                 lui     $k1, 0x4800
RAM:93632CA0                 sw      $k0, 0x48000000
RAM:93632CA4                 la      $t0, unk_93650684
RAM:93632CAC                 lui     $t1, 0xA000
RAM:93632CB0                 or      $t0, $t1
RAM:93632CB4                 la      $ra, unk_93632CC4
RAM:93632CBC                 jr      $t0
RAM:93632CC0                 nop

Error is then - RAM:93632CA0: Can't find name (hint: use manual arg)

Everything else remains as raw.

Chris

6

Hardware / Re: Philips DIT9719 (BT Vision) bootloader dumped :)

06. Sep 2008, 15:53

Thanks, but with mipsl I still get the error :-

IDA Pro can't identify the entry point automatically as there is no standard if binaries.

Please move to what you think is the netry point and press C to start the auto analysis.

Do I need to add something to IDA to help with the analysis?

Chris

7

Hardware / Re: Philips DIT9719 (BT Vision) bootloader dumped :)

06. Sep 2008, 14:06

Yes, the differences at the end, so that would exlain it.

Can you tell me th esetting so I can analyse the file myself?

Thanks
Chris

8

Hardware / Re: Philips DIT9719 (BT Vision) bootloader dumped :)

06. Sep 2008, 13:19

its mips ii iirc and i think it detects its entrypoint.

is it 7421 by chance as well ?

Hmm, I have the following options for MIPS, is there an additional proc lib to laod for mipsii?

mipsb
mipsl
mipsr
mipsrl

It is a DIT9719/05, maybe the differences are to be expected i.e. unique to each box?

Cheers
Chris

9

Hardware / Re: Philips DIT9719 (BT Vision) bootloader dumped :)

06. Sep 2008, 12:30

Hi,

Sorry to drag up this fairly old topic with my first post.  But I think my wuestion is relevant to this thread.

I have dumped my BTVision bootloader.  It is slightly different to Mick's based on a hex file comparison, appear it may be a later version.  What is the entry point for the IDA analysis?  Actually the correct setting for ROM/RAM would also be useful to confirm.

I set base address of RAM as 0x93600000
Processor - mipsl
Length - I assume 1meg based on the file size of the dump.

Cheers
Chris