Hacking Official [Source Release] ReiNand CFW

[Supster131]

theres a hole in this theory somehow since i play yellow VC on emu just fine, haha. I dont know why it works for me it just does

Yellow is GBC, not GBA though.
Yellow is an emulator.

edit: ninja'd?

 

[SomeGamer]

Yellow is an emulator.

Isn't AGB_FIRM hardware emulation?

 

[Kuroi-Akira]

but its a VC, not an emulated game. lol
im confused

Actually it is the Stock Gameboy Color Emulator used by the GBC VC games.

 

[Reisyukaku]

Like Kuroi said, that's not an AGB_FIRM title. Try something like the ambassador GBA games to see what we mean.

oh, then just play VC games in sysnand.. if its really a big deal i can take out the button trigger and make it a flag in a config file, but then there goes the convenience factor :T

 

[Supster131]

Isn't AGB_FIRM hardware emulation?

I think so, the 3DS technically has GBA hardware.

 

[alex61194]

theres a hole in this theory somehow since i play yellow VC on emu just fine, haha. I dont know why it works for me it just does

but yellow dont work the same as gba games, try with red fire or emerald, they arent the same yellow dont even need agb patch

 

[daxtsu]

oh, then just play VC games in sysnand.. if its really a big deal i can take out the button trigger and make it a flag in a config file, but then there goes the convenience factor :T

Instead of a config file, you could read the CFG_BOOTENV register to see if it's 7 like Aurora suggested, then just force sysNAND if it is. The ideal solution would be making patches for AGB_FIRM to read/write from/to the emuNAND instead of sysNAND though, if that's even possible, then it wouldn't be an issue.

 

[Reisyukaku]

Instead of a config file, you could read the CFG_BOOTENV register to see if it's 7 like Aurora suggested, then just force sysNAND if it is. The ideal solution would be making patches for AGB_FIRM to read/write from/to the emuNAND instead of sysNAND though, if that's even possible, then it wouldn't be an issue.

>reading CFG_BOOTENV
yea, sounds easiest

>patching agb for emu
thats what i was thinking originally but that sounds painful af

 

[Aurora Wright]

Yellow technically is a regular 3DS title, it runs under NATIVE_FIRM and it's an official emulator (they did asm patches for linking stuff though, so props for that!)

 

[Deleted member 117573]

Forcing a reboot into sysNAND after playing GBA like AuReiNand would be the best solution. Currently it is on the user to remember to hold start after exiting GBA games so ReiNand boots into sysNAND preserving the save.

 

[daxtsu]

Forcing a reboot into sysNAND after playing GBA like AuReiNand would be the best solution. Currently it is on the user to remember to hold start after exiting GBA games so ReiNand boots into sysNAND preserving the save.

The nice thing is, it's an easy fix.

if(((~*(unsigned *)0x10146000) & 0xFFF) == (1 << 3)) return; //Press start to override emunand

becomes something like this:

#define CFG_BOOTENV *(volatile uint32_t *)0x10010000
if(((~*(unsigned *)0x10146000) & 0xFFF) == (1 << 3) || CFG_BOOTENV == 0x7) return; //Press start to override emunand

 

[Reisyukaku]

Ok, just got home from my 3 hr differential equations lecture. My brain hurts. I'll see what i can get done tonight lol.

 

[daxtsu]

Ok, just got home from my 3 hr differential equations lecture. My brain hurts. I'll see what i can get done tonight lol.

Free brain massages! Apply now! (If only.)

Edit: Also, you don't need a separate branch for o3ds necessarily, just do something like this (this obviously doesn't fix the offset differences with your thread and stuff):

//firm.c:
#define PDN_MPCORE_CFG     (*(u8*)0x10140FFC)
#define N3DS 1
#define O3DS 0
static u8 console = N3DS;

void loadFirm(void) {
// ...
if (PDN_MPCORE_CFG == 1)
       console = O3DS;
if (console == N3DS)
       arm9Loader(...);
}

// further on in...

void launchFirm(void) {
  // .. memcpys and such
  u32 entrypoint = (console == N3DS) ? 0x801B01C : (u32)firm->arm9Entry;
((void(*)())entryPoint)();
}

That register indicates the CPU core configuration, and if it's equal to 1 (i.e. only the first bit is set), then it's obviously an O3DS. The other bits indicate the other two cores I think, but basically, if it's not 1, then it must be an N3DS.

 

[Reisyukaku]

Free brain massages! Apply now! (If only.)

Edit: Also, you don't need a separate branch for o3ds necessarily, just do something like this (this obviously doesn't fix the offset differences with your thread and stuff):

//firm.c:
#define PDN_MPCORE_CFG     (*(u8*)0x10140FFC)
#define N3DS 1
#define O3DS 0
static u8 console = N3DS;

void loadFirm(void) {
// ...
if (PDN_MPCORE_CFG == 1)
       console = O3DS;
if (console == N3DS)
       arm9Loader(...);
}

// further on in...

void launchFirm(void) {
  // .. memcpys and such
  u32 entrypoint = (console == N3DS) ? 0x801B01C : (u32)firm->arm9Entry;
((void(*)())entryPoint)();
}

That register indicates the CPU core configuration, and if it's equal to 1 (i.e. only the first bit is set), then it's obviously an O3DS. The other bits indicate the other two cores I think, but basically, if it's not 1, then it must be an N3DS.

>All those conditionals
This triggers me, lol. But thanks, ill take it with a grain of salt

 

[daxtsu]

>All those conditionals
This triggers me, lol. But thanks, ill take it with a grain of salt

Could always use ifdefs for compile-time conditionals. :^)

 

[Seita]

Does Reinand support updated sysNAND?
Thanks

 

[daxtsu]

Does Reinand support updated sysNAND?
Thanks

Yes, but it won't auto-boot into sysNAND. It has FIRM0/FIRM1 protection, though.

 

[Seita]

Yes, but it won't auto-boot into sysNAND. It has FIRM0/FIRM1 protection, though.

Thanks for the quick reply

 

[Reisyukaku]

Yes, but it won't auto-boot into sysNAND. It has FIRM0/FIRM1 protection, though.

it will if you dont have emu/red nand

 

[Seita]

I have one. I guess I won't be able to auto-boot then.