Tutorial  Updated

Internal modchip - SAMD21 (Trinket M0, Gemma M0, ItsyBitsy M0 Express) Guide, Files & Support

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Please please accept my apologies if I haven`t replied to tags etc... I have no idea what is happening. I`m subscribed to this thread but I am not receiving notifications. Please inbox me if possible. Or tag me in another thread.

Its amazing that people are still checking all of this out. I thank you for all of the help and support I have received in this thread over this year.

Cheers. Matty.


A video showing a modchip in action. Thank you once again to @metaljay for providing this. This is what you can achieve by fitting a chip!



Section 1. Gather your software.

Get your chip software from THIS THREAD.
Follow the flashing instructions there...




Section 2. Removing USB port and unneeded LEDs. (Adafruit chips only)
  • Next, we need to remove the USB port from the modchip. I recommend a heatgun or a rework station. Heat up until the USB port just lifts off the modchip.
  • Do the same for the LED just to the right of the USB port.
See picture:
20181031_110415.jpg


You are now ready to fit your device. Proceed to Fitting section.





Section 3. Fitting modchip to your Switch.
New Universal Method. All SAMD-based internal chips. If your chip is not supported and you cannot work it out, PM me.

Trinket M0.
Solder as laid out in the following picture

trinketfinal.jpg

==================================================
Rebug SwitchME M0. Use Trinket files.
Solder as laid out in the following picture

rebugfinal.jpg

==================================================
RCMX86 - Internal modchip version.
Solder as laid out in the following picture

RCMX86-Internal-Final.jpg


==================================================
Gemma M0. Use Gemma files.
Solder as laid out in the following picture


gemma final.jpg

==================================================
ItsyBitsy M0 Express. Use ItsyBitsy files.
Solder as laid out in the following picture

itsybitsyfinal.jpg




==================================================
Feather M0 Express. Use Feather files.
Solder as laid out in the following picture

feather_final.jpg




BUILD YOUR OWN FROM A QFP ATSAMD21E18. Trinket equivalent pins.
Flash Trinket bootloader using OpenOCD via serial pins SWDIO / SWDCLK. Fit a reset switch somewhere... Or going to power / wake (aka method 2). If building for external use, it is good practice to fit a third capacitor between 3V & GND. This is deliberately vague and ambigious, as this needs research and you need to know what you are doing.

Link for setting the Pi up with OpenOCD: HERE
Raspberry Pi OpenOCD image in downloads section or HERE
SAMD pi connection.png



Alternative Solder Points

Credit to @consolex for original pic. I`ve added alternative points to solder to:
Alternatepoints.jpg


Credit to @pyorin for this much tidier version showing the same info as the above one!
Alternatepoints2.jpg

s-l1600.jpg

alternative3v.jpg




Replacement Parts List

Ok... So you have damaged your switch soldering your chip in. Not to worry.

First things first, DO NOT BRIDGE THE CONTACTS HOPING TO REVIVE YOUR SWITCH. With resistors, you may possibly get away with this, but with the capacitors listed below, if you jump these points, you will make a nice short-circuit to the PMIC and / or the M92T36, killing them instantly. Don`t do it.

OK... I`ll list these parts with METHOD 2 & 3 TRINKET PIN NUMBERS and the values of the components they solder to.

TRINKET 3V (POWER SUPPLY) - 2.2uF 0402 size MLCC capacitor. Voltage unimportant as long as it is over 6.3v
TRINKET PIN 2 (POWER ON RESET - goes to pin 5 on M92T36)- 4.7uF 0402 size MLCC capacitor. Voltage unimportant as long as it is over 6.3v
TRINKET PIN 0 (VOL+) - 150R (150 ohms) 0201 Thick Film resistor. 50mW
TRINKET RESET (SWITCH POWER BUTTON) - 150R (150 ohms) 0201 Thick Film resistor. 50mW


I recommend RS components.

FAQ

Q - How do I boot the switch into APX (RCM) mode?

A - You need to short out pin 10 on the right joycon rail to GND with a jig or modded joycon or paperclip (not recommended... Buy a jig you cheap-ass gyppo). Once shorted out, hold down vol+ and power. The switch screen should be off... Plug into your PC and it should recognise a APX device. Well done. You are in RCM.

Q - What glue should I use?
A - Only glue if necessary! Ideally if your soldering is of sufficient quality and your wire is thin enough, you don`t need glue. I use a bit because I am OCD. Anyway, use Epoxy. It`s what I use. Gives you some working time, is solid. Superglue makes a mess DO NOT USE SUPERGLUE. The only thing super about it is how it melts things. Epoxy won`t stick to the shield long-term, so bear that in mind. Pure Acetone will remove epoxy. Acetone tends to remove / melt anything to be warned. CHECK YOUR GLUE WON`T GO CONDUCTIVE OVER TIME - LOOKING AT YOU SCAMSUNG! The combination of heat cycles and absorbing of moisture can turn adhesive into a high-impedance connection!

Q - What size wire should I use?
A - I use AWG40 magnet wire or AWG30 Kynar. AWG40 goes onto components easier... And if you snap it, chances are the wire will snap and not the trace / component.
A2 - You can also use AWG30. I recommend Kynar wrapping wire but any will do. Looks nice, good resistance to elements, tidy. Nothing thicker than AWG30. You are just causing yourself more headaches. Trust me.

Q - Is AWG40 thick enough?
A - Yes. AWG40 is good for around 90mA.

Q - which methods do you recommend?
A - Connect all the straps...

Q - how do you recommend to set it up?
A - Fusee Suite. Search for Fusee Suite or go to link at top of this OP.

Q - My switch is flat and won't turn on.
A - Have you got the charger connected? Disconnect it or your switch won't boot! Boot to a payload (SX loader/Hekate), reconnect charger and leave on the payload menu and charge. Leave for 15 minutes and switch will start normally. It will continue charging one booted.

Disclaimer:
You have only yourself to blame. This voids warranty. This may or may not get you banned from online services. If it does, you got yourself banned. I`m not responsible if you kill your switch / your first-born with any of this in this post. I`m not infalliable. I`m partly senile. Do your own research. Kids, get bill payers permission before you attempt even using a screwdriver.
NUTSHELL: Don`t come having a go at me because you fooked your £300 console up. I`ll do my best to help you though if you do, Just don`t blame me.

Credits to Quantum-Cross, Atlas44, @Ninoh-FOX , @jcrorxp , @tecfreak, @mooglazer, @subcon959, @64Dp128k, @mikeleuskaldunak, @M-O-B, CTCaer, @evilsperm, @consolex and everyone else for valuable input.


IF YOU REQUIRE SUPPORT, IF YOUR CONSOLE ISN`T WORKING CORRECTLY... PLEASE POST A HIGH RESOLUTION PICTURE OF YOUR INSTALL. You might think it isn`t your soldering, but in all cases with the new methods, it is bad soldering. So, please post a picture.


A BRIEF WARNING - PLEASE READ
THIS MOD IS NOT FOR THE FEINT OF HEART. WE ARE SOLDERING TO TRACES AND COMPONENTS ON THE FRONT SIDE OF THE BOARD TO SAVE HAVING TO REMOVE THE BOARD AND SOLDER TO TESTPOINTS. IF YOU ARE STRUGGLING, OR THINK YOU ARE GOING TO STRUGGLE, PLEASE PLEASE SOLDER TO THE TEST POINTS NOTED IN THIS AND OTHER THREADS (YOU WILL NEED TO REMOVE THE MOTHERBOARD). DOUBLE - TRIPLE CHECK EVERYTHING. YOU HAVE BEEN WARNED!!!
Good soldering skills are needed!
A magnifying glass is needed!
Good soldering iron needed - ideally with a 0.3 conical tip. No more than 30w!
SECURE YOUR WIRES PRIOR TO SOLDERING. Stick them down with double-sided tape.
Only use glue if you need to and glue wires after soldering. Don`t glue the solder to the component!
Put the tiniest amount of glue on the PCB mask only. Never on components. Use a cocktail stick for more glue control!!!
Take a look at alternative solder points to get you out of the sh*t if you do rip something off the board
If you aren`t the best at soldering, then think very carefully about connecting to pin 6 capacitor (the one in these new methods). If you rip this pad, you WILL NEED TO REMOVE YOUR BOARD and run from a testpoint.
 

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living

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Hi matty. Thanks for the very informative guide. Managed to install mine without issue but afraid im having an issue with my sons modchip install. Soldered trinket m0 and flashed with version 1 bootloader joycon only strap and hekatemodchip.uf2. The switch can boot normally to ofw but will not boot with the modchip. Just black screens out. Never goes to the menu asking for missing files. I've double checked usb data line connections. The trinket lights as it should to push the payload when i press volume + and power. I can access switchboot drive using the pc on double reset. If i press reset when booted the joycon disconnects then reconnects as it should. Anything else I can check? Thanks

** edit. Tried the old shaxlauncher in the end and that worked fine so think i'll stick with this as. Problem seems to be installing the firmware file to the trinket i think. When i copy over shaxlauncher it flashes green then proceeds to flash purple a few times i assume to install. When i copy over the hekatemodchip.uf2 it flashes green then ends on a red light. I'm just happy it wasn't my soldering! Cheers

hi i am also having problems to program the chip, could you tell me the order and the files that you used for the programming of the TRINKET M0 chip?
I can not do it, thanks
 

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please help me, i installed trinket m0 on my switch, but it doesnt boot on horizon. Im stock on SX logo when i booted into sx os
 

mattytrog

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Packs updated with my All-In-One monstrosity thing. Look in OP to download and follow the link to the Basic UF2 thread for a bit more information.

@james12 whats the problem? Need more information my friend. How have you fitted it? What files have you used? Post pictures of your install too..
 

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what is possible problem of on this switch
OK. Please remove all connections. Make sure none are bridged.

Next, remove autoRCM. If you have installed it.

We need to get it booting normally. Double-check nothing is bridged, in particularly the capacitors (3v) next to m92t36
 

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:( We need still more information.

Can you take a picture of your chip install? What switch firmware are you on?
before i installed trinket, im on fw 5.1 sx os, working fine, after i installed a trinket my problem appears, its sends payload but it doesnt continue booting, then i dicided to remove connections on trinket m0 and test it again, result is it doesnt boot, black screen of ofw, it hangs on cfw while booting,
 

mattytrog

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before i installed trinket, im on fw 5.1 sx os, working fine, after i installed a trinket my problem appears, its sends payload but it doesnt continue booting, then i dicided to remove connections on trinket m0 and test it again, result is it doesnt boot, black screen of ofw, it hangs on cfw while booting,
Thank-you.

You have a bridged connection by the looks of it where the 3v point goes to m92t36 capacitor. My guess.

Disconnect and reconnect battery. If using "joycon strap" or "vol+ strap" wires, make sure these points are not bridged to anything.
 

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Thank-you.

You have a bridged connection by the looks of it where the 3v point goes to m92t36 capacitor. My guess.

Disconnect and reconnect battery. If using "joycon strap" or "vol+ strap" wires, make sure these points are not bridged to anything.
can you please check on my photo
 

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Thank-you.

You have a bridged connection by the looks of it where the 3v point goes to m92t36 capacitor. My guess.

Disconnect and reconnect battery. If using "joycon strap" or "vol+ strap" wires, make sure these points are not bridged to anything.

I've successfully restored my nand backup through hetake, still it hangs when booting

--------------------- MERGED ---------------------------

Can you make it bigger resolution? Sorry I cant zoom it up that well.
here
 

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mattytrog

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I've successfully restored my nand backup through hetake, still it hangs when booting

--------------------- MERGED ---------------------------


here
Have you restored BOOT0 & BOOT1? If not, restore those.

Can`t see a bridge between the capacitors. But clean them and make sure they are not joined.

@james12 if restoring BOOT0/1 through Hekate doesn`t work, you will need keyset / choidujour to make new ones, then etcher to restore them. Or just use etcher and keyset (via hacdiskmount) to write back
 
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mattytrog

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yes i've already restore BOOT0 & BOOT1, PRODINFO,PRODINFOF,SAFE, SYSTEM,BCPKG1-6, still doesnt work

Whats your battery level like? If low, recharge it fully. Let it sit on Hekate screen and let it charge up in the dock.
 

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