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> Opened A Xbox To Find A Hitachi-lg Dvdrom, **MERGED TOPICS**
skyhi
post Apr 27 2005, 09:53 PM
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I have disassembled the two images completely using an 8051 disassembler found here http://pioneerdvd.rpc1.org/disWin32.zip

The outputs look beleivable smile.gif

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skyhi
post Apr 28 2005, 12:33 AM
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The link that I provided in my last post is definitely the disassembler for these drives - use the dis8051.exe - it's window's friendly.

I've done both the 8050L drive image and the 8163B but the output files are too big to post ~ 5MB's each.
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bourke
post Apr 28 2005, 01:25 AM
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Obviously I meant to look for a hard-coded drive speed value in the _decompiled_ firmware images.


cheers,
Bourkie
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jaskm
post Apr 28 2005, 06:47 AM
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hi i just swapped my thompson for a hitachi (yeah i shoulda done a lil research before i did it but oops) and all of a sudden it stopped workin. it doesnt read anything anymore, so i guess i might have been better off leaving the thompson in it. maybe u guys covered this earlier in this post, sorry if im repeating ideas, but is there any way to "fix" the hitachi so that it works again. im makin a wild guess but i think that there might be a "kill switch" in the hitachi that is activated when its swapped or sometin like that. i havent tried putting the hitachi back in the original box yet, but will do so tomorrow to see if it will work again. im a little pissed off at M$, well actually really really pissed off. any help would be awesome thanks guys sad.gif
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Janniz
post Apr 28 2005, 11:57 AM
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Hi

QUOTE(Tiros @ Apr 27 2005, 05:22 PM)
You need to use a disassembler for the target CPU. The fact that it is written in C has nothing to do with encryption, or if the program can be disassemled. I don't know how this "encryption" rumor got started anyway. Its just straight machine code.


To my knowledge the firmware is scrambled... after decryption you have a plain image and you can correctly disassemble it using (for example) objdump from Linux or any other mn103 disassembler...

The dld file is composed by an header a scrambled rom image and plain flashing code.

HTH
Janniz
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wenid
post Apr 28 2005, 12:24 PM
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QUOTE(Tiros @ Apr 28 2005, 03:22 AM)
Wrong again, Guido.
*


Why is it that you find it necessary to preface every post with some pathetic attempt at being insulting? You must have some serious insecurity issues, I guess.

Regarding the rest of your latest babble: hindsight is a beautiful thing, isn't it? Between the combination of you
{a}apparently not fully understanding what I was getting at (for which I'm prepared to accept at least some of the blame) and
{b} conveniently rearranging the order of events by implying certain things were known/understood in a different order to what really happened,
you've ALMOST come up with a convincing argument, except that it doesn't quite hang together. But really, WHO CARES ANYMORE?!? FFS!
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ferrari_rulz_02
post Apr 28 2005, 12:37 PM
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QUOTE(ferrari_rulz_02 @ Apr 26 2005, 09:29 PM)
ok, can we get a recap post here to say whats been acheived?

is there any tut's been written on this baby yet?
*



bump this
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maximilian0017
post Apr 28 2005, 04:47 PM
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QUOTE(jaskm @ Apr 28 2005, 05:53 AM)
hi i just swapped my thompson for a hitachi (yeah i shoulda done a lil research before i did it but oops) and all of a sudden it stopped workin.
*



Are you sure it's not something else?, a couple of questions:
1. Did it work in the beginning with this x-box?
2. Did you do something to it like emergency eject or something?
3. Does it do anything now?, like eject
4. In what country are you located?

But maby this is something for the general hw and not for this thread
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Tiros
post Apr 28 2005, 07:34 PM
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QUOTE(skyhi @ Apr 27 2005, 07:59 PM)
The outputs look beleivable smile.gif
*



Why do you say this?
It doesn't look like 8051 code to me.

QUOTE(jannizi @ Apr 27 2005, 07:59 PM)
To my knowledge the firmware is scrambled... after decryption you have a plain image and you can correctly disassemble it using (for example) objdump from Linux or any other mn103 disassembler...

The dld file is composed by an header a scrambled rom image and plain flashing code.
*



Sorry, but I think you are wrong.
The DLD binary portion is NOT encrypted.
The firmware is not "encrypted" in the rom.
It is not 8051 or 8048 processor.
Hexedit will not fix this problem.
Doesn't anyone here know anything assembler (not hex editing)?
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skyhi
post Apr 28 2005, 08:02 PM
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QUOTE(Tiros @ Apr 28 2005, 06:40 PM)
Why do you say this?
It doesn't look like 8051 code to me.
*




Just try disassembling the code as 8051 and see what you think.
To me it looks quite clean - there's no way it would disassemble this cleanly if it was the wrong code.
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Jetset Willy
post Apr 28 2005, 08:19 PM
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I did some googleing, looks like someone with commersial interests already cracked the
nut: "http://www.hardstore.com/default.asp?idA=70" Canīt say for sure tough, since i donīt speak italian..
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maximilian0017
post Apr 28 2005, 10:02 PM
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QUOTE(Jetset Willy @ Apr 28 2005, 07:25 PM)
I did some googleing, looks like someone with commersial interests already cracked the
nut: "http://www.hardstore.com/default.asp?idA=70" Canīt say for sure tough, since i donīt speak italian..
*



Nope, they are just trtying to sell the original black ones, no mention of cdr support AFTER flashing

It will probably be impossible to use an am2(nm102000) disasembler on the am3 set would it?, the problem being that the am3 seris is 32bit compaired to the 16 bits of the am2 series.
8051 is an 8 bit processor.....

The problem is finding a nm103 disassembler that runs on windows(at least that's it for me)

Maby someone with linux can run binutils on both firmwares and upload it to xbins, that would be a great help!!!
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Tiros
post Apr 29 2005, 01:03 AM
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QUOTE(bourke @ Apr 27 2005, 11:31 PM)
Obviously I meant to look for a hard-coded drive speed value in the _decompiled_ firmware images.
cheers,
Bourkie
*


Obviously you don't know shit from apple butter about how to fix this problem.

cheers,
Tiros
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Tiros
post Apr 29 2005, 01:26 AM
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QUOTE(skyhi @ Apr 28 2005, 06:08 PM)
Just try disassembling the code as 8051 and see what you think.
To me it looks quite clean - there's no way it would disassemble this cleanly if it was the wrong code.
*



Already did that before my post wink.gif

Just glancing at the disassembly, there are several obvious, serious problems with it being 8051 code. Why don't you take another look and report back your findings. If anyone else knows why it can't be 8051, make a reply.
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Janniz
post Apr 29 2005, 09:39 AM
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QUOTE(Tiros @ Apr 28 2005, 06:40 PM)
Sorry, but I think you are wrong.
The DLD binary portion is NOT encrypted.
The firmware is not "encrypted" in the rom.


I'm pretty sure that it is scrambled...
Look at the filler... in the DLD we have a sequence of
0x08 0x99 0x9B 0x9F
in the plain rom image it's all filled with 0xFF

The decripted version has some plain text string embedded (Eg: HL-DT-STDVD-ROM
at positions 0x20BA, 0x6000, 0x3c8ac)

QUOTE(Tiros @ Apr 28 2005, 06:40 PM)
It is not 8051 or 8048 processor.
Hexedit will not fix this problem.


You're right... I've never said that it's 8051 or someother proc.... I've said that any mn103 disassembler should work onto PLAIN descrambled firmware image...
And when I say MN103 I mean Panasonic MN103 series or if you prefer Matsushita MN103 or Matsushita AM33 that are in fact the same 32 bit processor !

I looked at this firmware some time ago... and I like collect infos before speaking....

You're also right when you speak in terms of hexediting... IMHO hexediting would not help in this case....

QUOTE(Tiros @ Apr 28 2005, 06:40 PM)
Doesn't anyone here know anything assembler (not hex editing)?

bump...

See ya
Janniz
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