Hacking ROM Trimming Side-Effects

[Reaper]

I trim all roms with ndstokyotrim on my kids card.

Does your kid look at the trimmer?

"wats that lady doing"

 

[OSW]

You do not lose any of those functions if your rom is trimmed properly.

As for rom-trimming application I'd gladly recommend NDSTokyoTrim as it's the best rom-trimmer I've encountered so far.

Yes, Improper trims either erase too much data, breaking some rom functions, or erase too little (and the rom is oversized).

I second NDSTokyoTrim. It's the best trimmer out there, never had any issues playing games with it.

However the supercard one has been known to have the occasional issue (Where it won't boot the rom), even if the rom is perfectly trimmed.

With pretty much every other card, you're 100% safe to trim.

 

[Hehe Moo]

I trim all roms with ndstokyotrim on my kids card.

Does your kid look at the trimmer?

"wats that lady doing"

Lol, I'm a bit worried my dad might get the wrong idea if I'm trimming a ROM...


Does NDSTokyoTrim require installation? I was hoping to find a nice ROM trimmer as well.

 

[MicShadow]

Does NDSTokyoTrim require installation? I was hoping to find a nice ROM trimmer as well.

Nope just works by itself

 

[Searinox]

I trimmed about 50, played them extensively. No issues. Saves lots of space.

 

[ShaneC]

Forgive the new guy for asking this; but am I correct in understanding that Rom trimming is similar to compressing?

ie. 64meg file, run through a trimmer - removes "garbage bits"; final output is a near duplicate of the original (sans garbage), and thus a smaller file?

 

[cupajoe]

Forgive the new guy for asking this; but am I correct in understanding that Rom trimming is similar to compressing?

ie. 64meg file, run through a trimmer - removes "garbage bits"; final output is a near duplicate of the original (sans garbage), and thus a smaller file?

Absolutely correct.

 

[ShaneC]

whoohoo! I smrt!

S-M-R-T!


I may have to look into this trimmer once my card comes in.

 

[Mr.Seiko]

I've used Rominator's built in trim feature when flashing to the cart, haven't had any issues with any games, Tested with Download Play and with Wi-Fi connections, all working fine.

 

[Reaper]

Actually I heard that if you use a trimmer it contacts the RIAA, releases a virus on your comp, and corrupts your microSD

 

[updowners]

Will trimming the patched Soma Bringer work?

 

[moodswinger]

I think the translation patch for Soma Bringer already trims the rom, so NO.

 

[Sportsmaniac1322]

Lol, I'm a bit worried my dad might get the wrong idea if I'm trimming a ROM...

There's a feature that'll let you set a different background so it doesn't have to be of those stupid anime girls! Just download something off the internet, re-size it, and set it as the background. Anyways every game I trimmed has worked perfectly thus far, so I'm happy. Also, is it safe to trim patched ROMs (like Bloody Diamond?) I trimmed it and it's worked up to the intro screen but I haven't tested any more of the game. Since it's just a modified Diamond I'd think it would work, right?

 

[gratefulbuddy]

Lol, I'm a bit worried my dad might get the wrong idea if I'm trimming a ROM...

There's a feature that'll let you set a different background so it doesn't have to be of those ..... anime girls! Just download something off the internet, re-size it, and set it as the background.

Or use the "disable background" option.

 

[PuyoDead]

Forgive the new guy for asking this; but am I correct in understanding that Rom trimming is similar to compressing?

ie. 64meg file, run through a trimmer - removes "garbage bits"; final output is a near duplicate of the original (sans garbage), and thus a smaller file?

Well, it's not quite the same method as compression, but it has the same end result. Compression basically removes redundant parts of a file. When it sees a bunch of the same thing in a file (or files) it simply lists where those parts occur, and how much. Kind of like "blah blah blah poop poop" would just be "blah x3 poop x2". But, y'know, a little more complicated than that.

Commercial roms, on the other hand, have to placed on a commercial cartridge, and those are of specific sizes. 256mbit, 512mbit, etc. But the game they make may not always be that large. So, they place it on the next largest size (say, a 200mbit game is placed on a 256mbit cart). When the game is dumped, all that extra blank space comes with it. When you use a rom trimmer, it just removes all that blank "garbage" space.

 

[ShaneC]

Forgive the new guy for asking this; but am I correct in understanding that Rom trimming is similar to compressing?

ie. 64meg file, run through a trimmer - removes "garbage bits"; final output is a near duplicate of the original (sans garbage), and thus a smaller file?

Well, it's not quite the same method as compression, but it has the same end result. Compression basically removes redundant parts of a file. When it sees a bunch of the same thing in a file (or files) it simply lists where those parts occur, and how much. Kind of like "blah blah blah poop poop" would just be "blah x3 poop x2". But, y'know, a little more complicated than that.

Commercial roms, on the other hand, have to placed on a commercial cartridge, and those are of specific sizes. 256mbit, 512mbit, etc. But the game they make may not always be that large. So, they place it on the next largest size (say, a 200mbit game is placed on a 256mbit cart). When the game is dumped, all that extra blank space comes with it. When you use a rom trimmer, it just removes all that blank "garbage" space.

So like running Wii Scrubber on an ISO backup and cutting down say "AC:CF" to about 600meg from 4.3gig (or whatever)...except that the roms are playable at however many meg vs. the full cart size.

I gotcha!