Manually fix 480p settings for games?

[cubes]

So I know that many usb loaders support this by now, but I was wondering if it was manually possible (hex editing, cheat code, etc.) to make games and channels run with the correct 480p settings? Since it IS a software issue and not a hardware issue. Here is what I am referring to: https://shmups.system11.org/viewtopic.php?p=1361335#p1361335

 

[leseratte]

That is possible. After all, it's just a code change. For example, in Mario Kart Wii you could use this cheat code: https://wiki.tockdom.com/wiki/User:Leseratte#480p_graphics_fix

Though, I don't think anyone has made an easy-to-use binary patch or cheat code that can be used with all games.

 

[Maeson]

...I guess one could use those codes with Dolphin's debug mode and see which data they replace. Knowing the strings of data they replace, we could try and find matches on other games.

That's more or less what we used to find about the deflicker filter, or what I did to patch several PAL GC games to work at 60Hz and not 50Hz. Probably easier if every game has the same bug and have the same string of data.

Edit: Or maybe not. I found where the code in the cheat is put in memory but trying with and without the cheat pretty much every value around that part in memory changes.

 

[leseratte]

The main "issue" is that the replaced code is longer (8 bytes) than the code it replaces (4 bytes). That means even if you manage to find the location automatically, you can't just patch find-and-replace, you need to find some empty space in the game to include the 8 bytes, and then create a branch instruction that jumps to that location.

It is possible, but probably not something the average person is going to be able to do manually with a hex editor.

 

[cubes]

Oh I see. Thanks. That does sound advanced