[Savannah-register-public] [task #4525] Submission of NopOS

[anonymous]

Follow-up Comment #9, task #4525 (project administration):

Hello, I changed the copyright note in these files for this:

/*
 *  Copyright:
 *  1998 Fabian Nunez <address@hidden>
 *  2005 Pablo Guerrero Rosel <address@hidden>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the ....

But, I have some questions:

If I get some code with GPL license and copyright and I modify it to use with
my GPL code, Can I put my copyright and the original, or only the original?

If I get some code with License error (like the Address, or something like
that) , must I fix that?

If I get code from differents authors (all GPL) to write some modules, must I
to specify what piece of code has written each author? 

Sorry I write too questions, but I want to known what I have to do in the
future. 

Thanks.
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Additional Item Attachment:

File name: nopos4.tar.gz                  Size:19 KB
Fixed the copyright of floppy.c and include/floppy.h
<http://savannah.gnu.org/task/download.php?item_id=4525&item_file_id=278>

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