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flat assembler > Heap > hello everyone,excuse me how to edit lg dvd firmware

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kerr



Joined: 24 Feb 2016
Posts: 138

hello everyone,excuse me how to edit lg dvd firmware

Hello Everyone.

I've a Lg DVD firmware that needs to be modified it version,
I‘ve tried a lot of ways,,Really bad ,But it failed.
It makes me sad , and i don't know how to change it .
I’ve changed the GUE1N to GUE2N ,But the brush is still the original GUE1N.

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Post 28 May 2018, 02:49
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comrade



Joined: 16 Jun 2003
Posts: 1114
Location: Russian Federation

You need to use a hex-editor.
Post 28 May 2018, 03:12
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kerr



Joined: 24 Feb 2016
Posts: 138


comrade wrote:
You need to use a hex-editor.



yes. but i need modify it .


Description:
Filesize: 7.2 KB
Viewed: 496 Time(s)

20180528115444.png



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Post 28 May 2018, 03:55
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kerr



Joined: 24 Feb 2016
Posts: 138

Does this bug have no friends to know how to modify it?
Post 30 May 2018, 17:43
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Furs



Joined: 04 Mar 2016
Posts: 1157

Is this for the DVD drive, or the disc? I doubt anyone knows how to modify the firmware of a specific drive, that's proprietary most of the time. Confused
Post 30 May 2018, 21:35
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kerr



Joined: 24 Feb 2016
Posts: 138


Furs wrote:
Is this for the DVD drive, or the disc? I doubt anyone knows how to modify the firmware of a specific drive, that's proprietary most of the time. Confused



This is hitachi dvd drive firmware model number.
It's more difficult than imagined.
Do you know ?

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Post 31 May 2018, 10:09
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Furs



Joined: 04 Mar 2016
Posts: 1157

Nope, and I doubt anyone on this board knows, unless they deal with this stuff (at work or hobby).
Post 31 May 2018, 17:05
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kerr



Joined: 24 Feb 2016
Posts: 138

Panasonic firmware is better modified , but Hitachi's firmware modification is not so easy.
Post 03 Jun 2018, 06:41
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kerr



Joined: 24 Feb 2016
Posts: 138

How can i modify dvd firmware to enable it to boot properly?


Description:
Download
Filename: R1415915b.txt
Filesize: 1 MB
Downloaded: 10 Time(s)

Post 03 Jun 2018, 06:45
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MSrobots2



Joined: 21 Oct 2017
Posts: 11

Firmware is usually written by the manufacturer of the device. And if they need to update it they have to send it out to existing customers.

But they have to make sure that the provided image not actually got corrupted on the way to their product.

This is usually done by a checksum in the image. Not for copy protection, more as integrity check.

Most often this is done with a simple xor over all bytes, patching the last byte so that the xor over all bytes ends up as zero.

But this is just a example, not in any way the rule how it is done.

So your attempt to just change one byte might just not boot because of a wrong checksum, somewhere.

Mike
Post 03 Jun 2018, 16:45
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kerr



Joined: 24 Feb 2016
Posts: 138


MSrobots2 wrote:
Firmware is usually written by the manufacturer of the device. And if they need to update it they have to send it out to existing customers.

But they have to make sure that the provided image not actually got corrupted on the way to their product.

This is usually done by a checksum in the image. Not for copy protection, more as integrity check.

Most often this is done with a simple xor over all bytes, patching the last byte so that the xor over all bytes ends up as zero.

But this is just a example, not in any way the rule how it is done.

So your attempt to just change one byte might just not boot because of a wrong checksum, somewhere.

Mike



Yeah,this is usually done by a checksum,but i changed the number of 10 at address 0x703a to 0c , its model number changed has taken place, but i was prompted to get the command failed.

please help me ,thanks.

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Last edited by kerr on 04 Jun 2018, 02:12; edited 1 time in total
Post 04 Jun 2018, 02:03
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15809
Location: Misner space

Have you tried contacting the manufacturer?
Post 04 Jun 2018, 02:04
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kerr



Joined: 24 Feb 2016
Posts: 138


revolution wrote:
Have you tried contacting the manufacturer?


Oh No this is manufacturer give me .

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Post 04 Jun 2018, 02:19
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
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Did you tell them your problem? What did they suggest?
Post 04 Jun 2018, 08:11
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kerr



Joined: 24 Feb 2016
Posts: 138


revolution wrote:
Did you tell them your problem? What did they suggest?



This is for me to modify the model number.

I modify the GUEN1 to GUE2N But show the original.
but i changed the number of 10 at address 0x703a to 0c show the GUE2N ,But this model number show the "boot" string .
firmware is get cmd failed.

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Post 04 Jun 2018, 08:44
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kerr



Joined: 24 Feb 2016
Posts: 138

Hi friends.
please help me,how to edit this firmware version?

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Post 09 Jun 2018, 07:43
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15809
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The "how" is easy, download a hex editor. The problem is determining which bytes to change and what to change them to.

What bytes did the manufacturer say should be changed?
Post 09 Jun 2018, 09:24
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kerr



Joined: 24 Feb 2016
Posts: 138


revolution wrote:
The "how" is easy, download a hex editor. The problem is determining which bytes to change and what to change them to.

What bytes did the manufacturer say should be changed?



Firmware model number change GUE1N into GUE2N .

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Post 11 Jun 2018, 03:13
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15809
Location: Misner space

Why can't the manufacturer send you a new updated file?
Post 11 Jun 2018, 03:50
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kerr



Joined: 24 Feb 2016
Posts: 138


revolution wrote:
Why can't the manufacturer send you a new updated file?



This is change drive ,So updated file is ineffective.

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Post 11 Jun 2018, 04:44
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