Adding files to an ISO

[ElSolido]

Hey friends again and thanks for your help.

My new problem is I want to add some new files to try some in the Daytona USA ISO file, but when I add the files and select the image in the emulator it says its an invalide cd image or putting in Saturn system. HOw should I do it?

 

[antime]

What are you doing and how?

 

[ElSolido]

In a beginning Ive just changed some background and textures to see how it works and. We some friends are going to try to do a mod or something like that for this game or likely. What I want to do is once I've changed the files how can include this files again in the ISO avoiding the emulator gives me errors?

Thanks in advance.

 

[antime]

What method did you use to change the disc image? Patch the file directly, extract and rebuild, something else?

Modifying a file and patching the image should work for the most part, but if the image is in any other format than mode1/2048 you must remember to regenerate the ECC data. Doing any more extensive modifications is more difficult, as games can use direct sector addressing instead of going through the filesystem.

 

[ElSolido]

I was using Ultraiso and Magiciso to add files and package again.

 

[Taelon]

I suspect that either of these apps saves the .iso images as Mode1/2048, at least by default. Save as raw data (Mode1/2352) as antime suggested. If the programs won't let you do that, both CDmage and ISObuster will do a conversion to raw mode (by generating the ECC data) very easily.

 

[antime]

I wasn't suggesting that. In fact, if you can, avoid doing so.

I don't know how those programs in particular work and you're not really giving us any details, but at a guess you're destroying the IP. Read the disc format standards manual to see what's required of a Saturn disc.

 

[Taelon]

WOW! Good one - I completely forgot about the boot sectors. AFAIK all you do is save the first 16 sectors from the original ISO to a file... and copy the file back to the first 16 sectors of the new ISO, replacing them. That should do the trick!

And yeah, antime - I misunderstood what you said about ECC data. Oops. 🙂

 

[ElSolido]

Thank you guys!! thats all for now. Rgards and thanks a lot