savegame editting

barev · 06-01-2008, 01:27 AM

Hi,

does anyone know how could one edit the rott savegames to change the cheat codes state in a savegame i.e. change the save state so that certain cheats are enabled etc.

The reason for asking this is that I play rott on my PSP, and you can guess that I am unable to input any cheat code as the PSP lacks a real keyboard. I would like to be able to edit my PSP rott savegames to enable the cheats via the save state.

Any suggestions would be appreciated

10x in advance

johndough · 06-01-2008, 08:53 AM

You could use a hex editor.

barev · 06-01-2008, 03:40 PM

Quote:

Originally Posted by johndough

You could use a hex editor.

Yeah, of course but what should I change?

johndough · 06-01-2008, 05:55 PM

Quote:

Originally Posted by barev

Yeah, of course but what should I change?

Anything you want.
Nobody is going to find the data for you.
You'll have to find it yourself.
It's not that hard.

barev · 06-03-2008, 01:27 PM

OK, I got the overall 'not really willing to help' tone. But after all the savegame format is defined somewhere in the source code, right? I mean it would be kind of hard to just guess which hex address in the file defines the cheat state. I though someone who has already gone through the code or has some insights about the game could help me ...

06-03-2008, 03:52 PM

It's kind of hard to change anything with a hex editor, if you don't have a clue what you are doing.
What do you want to change actually?
If it's health, armor, weapons or any other stats, you could use a value finder while you are playing the game.

johndough · 06-03-2008, 07:02 PM

Quote:

Originally Posted by barev

OK, I got the overall 'not really willing to help' tone. But after all the savegame format is defined somewhere in the source code, right? I mean it would be kind of hard to just guess which hex address in the file defines the cheat state. I though someone who has already gone through the code or has some insights about the game could help me ...

So if I don't do it all for you I'm "not really willing to help?"
Well, that's kind of rude. I gave you advice. The only advice I could think of. Nobody else was even responding to you.
I bet virtually all the people that write easy to use save game editors found the data manually by trial and error in a hex editor.

barev · 06-12-2008, 12:23 PM

No offense on anyone not being able to help me. I just expected some constructive help like go check file '...' in the source code where the save game format is defined or try searching for '...' in the savegame file. I know the change can be made with a hex editor but doing trial an error by just randomly changing some bytes doesn't seem like the best way of doing this.

TerminX · 06-12-2008, 06:23 PM

Make 3 savegames right after one another, the first without cheats and the second and third with cheats enabled. Isolate which bytes changed between savegame 1 and 2 and see which of the bytes that changed between saves 1 and 2 are still the same between saves 2 and 3. It's not really a matter of randomly changing things.

Shadow Master · 06-13-2008, 09:19 PM

In my copy of ROTT, DIPSTICK and CHOJIN don't seem to have a true/false value in saved games, but rather in the game's internal state part that is not dumped to them. i.e. Any saved game that I load in the same session of ROTT will have those cheats enabled, and likewise, if I restart ROTT, no saved game will have them. Of course I haven't checked the source code yet.

barev · 06-18-2008, 02:03 PM

Quote:

Originally Posted by TerminX

Make 3 savegames right after one another, the first without cheats and the second and third with cheats enabled. Isolate which bytes changed between savegame 1 and 2 and see which of the bytes that changed between saves 1 and 2 are still the same between saves 2 and 3. It's not really a matter of randomly changing things.

Good idea TerminX but actually if I could enable the cheats on my PSP I wouldn't need to edit the savegame, right? I'll try this on the PC though, maybe that could shed some light on the issue.

Quote:

Originally Posted by Shadow Master

In my copy of ROTT, DIPSTICK and CHOJIN don't seem to have a true/false value in saved games, but rather in the game's internal state part that is not dumped to them. i.e. Any saved game that I load in the same session of ROTT will have those cheats enabled, and likewise, if I restart ROTT, no saved game will have them. Of course I haven't checked the source code yet.

That was one of my concerns. I'll have to check your theory and will write the results in the thread. 10x for the suggestion.

06-03-2008, 03:52 PM	#6
The Stinger Guest	Re: savegame editting It's kind of hard to change anything with a hex editor, if you don't have a clue what you are doing. What do you want to change actually? If it's health, armor, weapons or any other stats, you could use a value finder while you are playing the game.

06-01-2008, 01:27 AM	#1
barev	savegame editing Hi, does anyone know how could one edit the rott savegames to change the cheat codes state in a savegame i.e. change the save state so that certain cheats are enabled etc. The reason for asking this is that I play rott on my PSP, and you can guess that I am unable to input any cheat code as the PSP lacks a real keyboard. I would like to be able to edit my PSP rott savegames to enable the cheats via the save state. Any suggestions would be appreciated 10x in advance Last edited by barev; 06-01-2008 at 01:36 AM.

06-01-2008, 08:53 AM	#2
johndough	Re: savegame editting You could use a hex editor.

06-03-2008, 01:27 PM	#5
barev	Re: savegame editting OK, I got the overall 'not really willing to help' tone. But after all the savegame format is defined somewhere in the source code, right? I mean it would be kind of hard to just guess which hex address in the file defines the cheat state. I though someone who has already gone through the code or has some insights about the game could help me ...

06-12-2008, 12:23 PM	#8
barev	Re: savegame editting No offense on anyone not being able to help me. I just expected some constructive help like go check file '...' in the source code where the save game format is defined or try searching for '...' in the savegame file. I know the change can be made with a hex editor but doing trial an error by just randomly changing some bytes doesn't seem like the best way of doing this.

06-12-2008, 06:23 PM	#9
TerminX	Re: savegame editting Make 3 savegames right after one another, the first without cheats and the second and third with cheats enabled. Isolate which bytes changed between savegame 1 and 2 and see which of the bytes that changed between saves 1 and 2 are still the same between saves 2 and 3. It's not really a matter of randomly changing things. __________________ EDuke32 \| Duke4.net forums, the largest Duke Nukem 3D community on the Internet Visit #eduke32 on irc.freenode.net!

06-13-2008, 09:19 PM	#10
Shadow Master	Re: savegame editting In my copy of ROTT, DIPSTICK and CHOJIN don't seem to have a true/false value in saved games, but rather in the game's internal state part that is not dumped to them. i.e. Any saved game that I load in the same session of ROTT will have those cheats enabled, and likewise, if I restart ROTT, no saved game will have them. Of course I haven't checked the source code yet. __________________ You're master of no shadows! -- Steve Duke Nukem Forever! [My website \| Public Commander Keen Forum \| The Commander Keen Wiki]