Hacking Question Just switch to emuMMC, question regarding emuMMC backup and FW update

B

barbilio

New Member
OP
Newbie
Level 1
Joined
Jul 9, 2019
Messages
4
Trophies
0
Age
44
XP
130
Country
Netherlands
Hi all,

I have just successfully migrated from CFW on sysNAND to CFW on emuMMC SD partition.
My current situation is:
- sysNAND: System version 7.0.1, autoRCM enabled, CFW AMS 0.9.1
-emuMMC: System version 7.0.1, autoRCM enabled, CFW AMS 0.9.1
(They are basically mirrored).

Some time ago (before emuMMC was available) I updated my sysNAND using ChoidujoiurNX and enabled autoRCM, so no burnt fuses above FW v 3.0.1.
In the future I would like to restore my original clean NAND backup (OFW 3.0.1) to eventually use warm boot/cold boot options, but for the time being (as I do not use online) I am planning to keep my sysNAND as described above.
However, I would also like to update my current emuMMC FW version to version 8.0 or above for game compatibility.
Hereby my questions:
- I know that I have to use ChoidujourNX to FW update while in emuMMC. But what should I do with the autoRCM option? Should I enable it or not? If not, will my fuses get burnt if I boot from sysNAND CFW? I want to be able to downgrade in the future!
- how to backup emuMMC in order to restore if something goes wrong in the update process? As far as I got I cannot use nand backup to backup emuMMC.
- how to restore an emuMMC backup eventually?

Thank you
 
K

KrytpicLuck

Member
Newcomer
Level 1
Joined
Sep 22, 2017
Messages
11
Trophies
0
Age
42
XP
83
Country
United States
barbilio said:
Hi all,

I have just successfully migrated from CFW on sysNAND to CFW on emuMMC SD partition.
My current situation is:
- sysNAND: System version 7.0.1, autoRCM enabled, CFW AMS 0.9.1
-emuMMC: System version 7.0.1, autoRCM enabled, CFW AMS 0.9.1
(They are basically mirrored).

Some time ago (before emuMMC was available) I updated my sysNAND using ChoidujoiurNX and enabled autoRCM, so no burnt fuses above FW v 3.0.1.
In the future I would like to restore my original clean NAND backup (OFW 3.0.1) to eventually use warm boot/cold boot options, but for the time being (as I do not use online) I am planning to keep my sysNAND as described above.
However, I would also like to update my current emuMMC FW version to version 8.0 or above for game compatibility.
Hereby my questions:
- I know that I have to use ChoidujourNX to FW update while in emuMMC. But what should I do with the autoRCM option? Should I enable it or not? If not, will my fuses get burnt if I boot from sysNAND CFW? I want to be able to downgrade in the future!
- how to backup emuMMC in order to restore if something goes wrong in the update process? As far as I got I cannot use nand backup to backup emuMMC.
- how to restore an emuMMC backup eventually?

Thank you
Click to expand...
I was on the same boat as you. But took the leap and updated the emuMMMC with ChoidujoiurNX hoping it would do both.
Somewhere along with all the research I did, it says to disable the autoRCM in ChoidujoiurNX. Someone out there didn't do it and is in a non boot mode after the Switch logo appears on the screen. But disabling autoRCM will burn fuses but hekate has the ability to enable GC to prevent that. Or at least I know it does.
I finished it and only updated the firmware inside CFW emuMMC 8.1.0 and the sysnand is still at 8.0.1
Trying to figure out how to update the sysnand now.
 
K

KrytpicLuck

Member
Newcomer
Level 1
Joined
Sep 22, 2017
Messages
11
Trophies
0
Age
42
XP
83
Country
United States
There’s this program that u will have to inject with TegraRCM called bricmii. That will display the burned fuses. Check your PM
 
B

barbilio

New Member
OP
Newbie
Level 1
Joined
Jul 9, 2019
Messages
4
Trophies
0
Age
44
XP
130
Country
Netherlands
KrytpicLuck said:
I was on the same boat as you. But took the leap and updated the emuMMMC with ChoidujoiurNX hoping it would do both.
Somewhere along with all the research I did, it says to disable the autoRCM in ChoidujoiurNX. Someone out there didn't do it and is in a non boot mode after the Switch logo appears on the screen. But disabling autoRCM will burn fuses but hekate has the ability to enable GC to prevent that. Or at least I know it does.
I finished it and only updated the firmware inside CFW emuMMC 8.1.0 and the sysnand is still at 8.0.1
Trying to figure out how to update the sysnand now.
Click to expand...

Thanks for the reply.
As far as I know, autoRMC will normally change a byte in the NAND/MMC so that your switch is “bricked” on purpose, and then it won’t go through boot phase (so fuse check, fuse burn, etc...). Using choiNX will also overwrite the current RCM option.
The doubt is: as I want to launch it on emiMMC, will autoRCM be applied to the “fake/emu” NAND/MMC or still to the real one?
 
LeMageFro

LeMageFro

Well-Known Member
Member
Level 8
Joined
Mar 29, 2018
Messages
215
Trophies
0
XP
1,396
Country
France
KrytpicLuck said:
I was on the same boat as you. But took the leap and updated the emuMMMC with ChoidujoiurNX hoping it would do both.
Somewhere along with all the research I did, it says to disable the autoRCM in ChoidujoiurNX. Someone out there didn't do it and is in a non boot mode after the Switch logo appears on the screen. But disabling autoRCM will burn fuses but hekate has the ability to enable GC to prevent that. Or at least I know it does.
I finished it and only updated the firmware inside CFW emuMMC 8.1.0 and the sysnand is still at 8.0.1
Trying to figure out how to update the sysnand now.
Click to expand...
You seem to be a bit confused as to how emuMMC works. There is no way your sysNAND could be updated if you use ChoiNX after booting your emuMMC, since everything that should affect your sysNand is now redirected to the emuMMC partition of your SD. If you want to update your sysNAND without burning fuses you have to boot it under CFW and then use ChoiNX. Also the "disable GC" option in hekate has nothing to do with autoRCM so I don't understand why you mentioned it ?

About barbilio's question concerning enabling auto-RCM when you update your emuMMC, it really shouldn't matter since nothing will be modified in your sysnand. Just to be extra safe I would let autoRCM on personally (in case I made a mistake and were not really under emuMMC when I update for exemple). When you created your emuMMC it copied your sysNAND with autoRCM enabled and yet your emuMMC works fine, so I don't see how having it enabled could be a problem. Just remember to update to the latest atmosphere to be sure it's compatible with the updated firmware.
And even if your emuMMC really couldn't boot after updating it with autoRCM enabled you could just recreate it from your sysNAND anyway, and then update it without autoRCM enabled.
 
Last edited by LeMageFro,

Site & Scene News

Go to forum More news

Popular threads in this forum

Emulation Homebrew  duckstation for Switch

Can you trade in a banned switch for an unbanned one?

Why is Atmosphere so dominant?

Crosscode Hacking thread

Hacking  Weird findings from that DQ trilogy switch port

Migswitch backups without certificate files

Hacking Misc Tutorial  Eiyuden Chronicle Hundred Heroes save editing

switch change sd card, but android start fail

General chit-chat
Help Users
  • RedColoredStars @ RedColoredStars:
    There is zero instacart delivery to here. No door dash. No Uber. Notta. Its a small farming community
     +1
  • Sicklyboy @ Sicklyboy:
    eagerly awaiting 4x 8TB HDDs to get delivered today
  • RedColoredStars @ RedColoredStars:
    So I drive the 30 miles there, spend $100-$150 on groceries, and drive back home. Still saved $$$ after gas over shopping locally.
     +1
  • K3Nv2 @ K3Nv2:
    You'd think you could make deals with local farmers
  • AncientBoi @ AncientBoi:
    :unsure::unsure::unsure: I could make a killing there doing instcart there :D @RedColoredStars
  • RedColoredStars @ RedColoredStars:
    It makes the trip even more worth it if I'm out of my medication and need to stop by the medical dispensary. I try to line the two up to avoid extra trips.
     +1
  • RedColoredStars @ RedColoredStars:
    @AncientBoi, Except the town is pretty MAGA infested. People still flying TRUMP 2016 flags all over. They didnt get the memo the year changed since then. lol.
     +1
  • RedColoredStars @ RedColoredStars:
    They passed a city ordinance last month. No smoking cannabis in public. Not even eating gummies. $300 fine and misdemeanor charge if caught. People can walk down the street smoking cigs and tossing the butts all over, but God forbit someone take a couple puffs of their medication.
     +1
  • RedColoredStars @ RedColoredStars:
    First off, it's recreationally legal here. Secondly, I have a prescription from my doctor and approved by the state. But still a fucking criminal.
     +1
  • RedColoredStars @ RedColoredStars:
    Like at bars. Cant sit outside even in the smoking section and take a few puffs. Yet I have to breath the cig smoke from 20 people chain smoking all night in every direction around me.
  • K3Nv2 @ K3Nv2:
    Honestly I feel like Trump is going to crush Biden just because of the trial
  • RedColoredStars @ RedColoredStars:
    They cite
    public health and safety concerns" LMAO!!! Yet they do nothing about the poison drinking water quality.
  • K3Nv2 @ K3Nv2:
    The look at how they treated me card is powerful within dumb voters
  • RedColoredStars @ RedColoredStars:
    A Trump win is certainly a possibility. If he's reelected, 4 more years then no one has to worry about him being president ever again. I survived last time, I'll survive it if there's a next time. Don't know how anyone could vote for the guy, but I'm also not anyone else but me.
     +1
  • K3Nv2 @ K3Nv2:
    Honestly things were cheaper with Trump but that's tounge and cheek could be exactly the same outcome if he won reelection
  • RedColoredStars @ RedColoredStars:
    All of the fake "Christians" vote for him even though he's broken like 8 of the 10 commandments... that we know of. Maybe all 10. LOL
     +1
  • K3Nv2 @ K3Nv2:
    A president is just a public figure within America
  • K3Nv2 @ K3Nv2:
    South park put it will there's always a bite between a turd sandwhich or a giant douce
     +1
  • RedColoredStars @ RedColoredStars:
    I like when he says stuff like "They are preventing me from talking!!!" Wait. What? You mean the person that is literally talking right now.. is being prevented from talking? LOL! Gag order also does not apply to taking the stand. He's free to say whatever he'd like. lolol
     +1
  • NinStar @ NinStar:
    holy fuck this discsussion sucks, where are my sisters
  • AncientBoi @ AncientBoi:
    :rofl2::tpi::rofl2:
  • K3Nv2 @ K3Nv2:
    Well if it sucks stop blowing turd sandwhich
     +1
  • Xdqwerty @ Xdqwerty:
    @NinStar, convince your parents to make a sister for you
  • NinStar @ NinStar:
    parents? what parents?
  • K3Nv2 @ K3Nv2:
    People who screwed each other to make you
     +1
    K3Nv2 @ K3Nv2: People who screwed each other to make you +1