Hey people,

I want to know if it's possible to write a mod or a modloader that can load mods for older versions like RedPower in a newer Minecraft version. I know that there isn't something like that , but is it possible or not?

Please answer me . I would be happy

~Santa

There's no way to do that, as for example RedPower uses code from 1.4.7 that's removed in 1.7.2, so that will throw one of many *****NotFoundException. You can deobfuscate RedPower using a deofbuscater and update it manually and keep it for your own, or you need to make a mod that add's all blocks etc to the earlier minecraft version.

how can I deobfuscate it? Can you give me a instruction? I will use it for my own only.

You can do that via Google.

 

TL;DR:

Search on Google.

 

So you seem to have little to none knowledge of either java or forge. There are thousands of differences between those versions and there is no possible way anyone would have made something to do that. NO WAY! In between that time variables where renamed things were completely redone and let's not forget we do not use item Ids anymore.

To CarbonBasedGhost's point- it would usually be easier just to recreate the mod from scratch. Unless you can get your hands on the source code before it was obfuscated, but you'd still have your work cut out for you.