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 Post subject: NES hacking
PostPosted: Sun Mar 10, 2019 9:10 pm 
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Joined: Sun Mar 10, 2019 9:05 pm
Posts: 2
Hello guys!
I'm new here but I was watching this site for a long time (6-7 years :D).
I have a question for you from a total noob, I have some nes hacks pretty awesome and I'l like to ask you how they were made.

https://www.youtube.com/watch?v=R8VpR1sgYqY

Look at this hack DB 3 Rosetta Stone... how is that even made? How can you hack a game and use its bosses? What you need to know? You need to use debugger, assembly or what? I'm total lost with debugger. Any answear will be appreciated.
Thanks a lot and sorry for this english xD (not native speaker).


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 Post subject: Re: NES hacking
PostPosted: Sun Mar 10, 2019 10:23 pm 
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Joined: Sun Sep 19, 2004 9:28 pm
Posts: 3958
Location: A world gone mad
What is your native tongue?


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 Post subject: Re: NES hacking
PostPosted: Sun Mar 10, 2019 11:39 pm 
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Joined: Sun Mar 10, 2019 9:05 pm
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Romanian.


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 Post subject: Re: NES hacking
PostPosted: Mon Mar 11, 2019 10:04 am 
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Joined: Fri May 08, 2015 7:17 pm
Posts: 2465
Location: DIGDUG
Quote:
how is that even made?


Lots of hard work.

You would need to identify the code and graphics for each boss, and redirect the hero's code to use that instead of his own.

Probably, you would disassemble the ROM, and run the game in a debugger with CDL (code/data logger) running, and mark each bit of code that each boss used, and which code the hero uses, etc. Rewrite and reassemble.

It could take a year, or more.

This would not be a first project. It would help if you studied 6502 opcodes, NES architecture, game cartridge mappers, and reverse engineering techniques.

_________________
nesdoug.com -- blog/tutorial on programming for the NES


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