Hacking 3DS Emulator Programming

[Yoshimaster96]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM. And that's precisely the amount of RAM that the 3DS uses, if I'm correct.

 

[Normmatt]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM. And that's precisely the amount of RAM that the 3DS uses, if I'm correct.

 

[Huntereb]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM. And that's precisely the amount of RAM that the 3DS uses, if I'm correct.

I wouldn't have read this if Normmatt hadn't have quoted it, but what-the-what?!

 

[Snailface]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM. And that's precisely the amount of RAM that the 3DS uses, if I'm correct.

My laptop is 64 bit, which obviously means it has 16777216 terabytes of memory.

 

[GorTesK]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM.

maybe 10 years ago.... nowadays every modern computer operates on 64bit architecture


edit: added the word "modern"

 

[ichichfly]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM. And that's precisely the amount of RAM that the 3DS uses, if I'm correct.

move the thread to EOF and start a new if needed

 

[Yoshimaster96]

I forgot about that, sorry. Just checked, and my computer is 64 bit *facepalm*. Looks like an emulator is feasible after all.

[EDIT]
Oh, and searching Google, I can only find the mnemonics for the ARM opcodes, and not their binary values. If anyone could provide a link, that would be great!

 

[matt123337]

Actually, due to most modern computers having a 32 bit address bus, that means 4G total RAM. And that's precisely the amount of RAM that the 3DS uses, if I'm correct.

This post is now my signature.

 

[Yoshimaster96]

Here's my loop:

Get input
Execute game code
Process GX commands (is this necessary?)
Display GPU commands

 

[Oxybelis]

Here's my loop:

Get input
Execute game code
Process GX commands (is this necessary?)
Display GPU commands

It think better plan would be:

bool dream = false;
while(dream not_eq true) {
  sleep(31557600); // dream about 3DS emu for a year
  cin>>dream; // did someone make it?
}

Would be faster too.

 

[Snailface]

Here's my loop:

Get input
Execute game code
Process GX commands (is this necessary?)
Display GPU commands

Just stop while you're ahead.

 

[dot7z]

So you can't dump it during boot up?

There was a guy (think it was Neimod) with a setup where he had removed the RAM chip and wired it to another board for dumping it. That would likely be the only way if its zeroed out after boot.

I forgot about that, sorry. Just checked, and my computer is 64 bit *facepalm*. Looks like an emulator is feasible after all.

Er, even with your original misconception it was still possible. The bigger facepalm wasn't about the 64-bit thing, it's that the 3DS only has 128 MB of RAM. That's less than most phones.

 

[I pwned U!]

it get's zeroed at the end of the boot process, before the main OS boots.

I might know a way to stop it from zeroing out, but I am not sure if it would work. I have a 3DS that does not load the HOME Menu after my mom accidentally removed the gamecard while it was running in sleep mode. I think that the built in ErrDisp title got corrupted, preventing it from booting the HOME Menu.

http://www.3dbrew.org/wiki/ErrDisp

Perhaps it would be possible to extract the bootrom on a 3DS having this problem.

 

[Yoshimaster96]

Ok, you go ahead and try that. Also, do the GX commands need to be emulated for homebrew, or are the registers accessed via ARM assembly?

 

[Oxybelis]

Ok, you go ahead and try that. Also, do the GX commands need to be emulated for homebrew, or are the registers accessed via ARM assembly?

There are several emulation methods. Low level GPU emulation or API simulation.

 

[Yoshimaster96]

Nah, I'm wondering if these commands are usually used in homebrew.

 

[ghjfdtg]

Seriously, dude? Read a book about emulation first.

 

[gamesquest1]

there is a few basic emulators out already, go look what they do