Question Is it possible to edit the Switch bootROM?

Discussion in 'Switch - Exploits, Custom Firmwares & Soft Mods' started by leafeon34, Jun 25, 2019.

  1. leafeon34
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    leafeon34 意地悪な男の人

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    We've all been told that the bootROM can't be patched after leaving the factory, and for all practical purposes we can say this is true. I found this post in the EoF and while clearly a joke, I was curious to know if it is possible if you have money. I did some research and found you can edit ICs using focused ion beams. But doing half an hour of research does not make me a professional. So if you have tens or hundreds of thousands of dollars to spend of specialised equipment, can you downgrade the Switch's bootROM?
     
    Last edited by leafeon34, Jun 25, 2019
  2. maxx488

    maxx488 GBAtemp Regular

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    Google the definition of ROM before making a post.
     
  3. leafeon34
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    leafeon34 意地悪な男の人

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    Google the definition of focused ion beam before making a comment.
     
  4. maxx488

    maxx488 GBAtemp Regular

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    Thats for EPROM or EEPROM chips dude, the switch doesnt have those kind of chips. So keep googling.
     
  5. leafeon34
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    leafeon34 意地悪な男の人

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    EPROM and EEPROM are erased using ultraviolet light. Focused ion beams are completely different.
     
  6. Crusatyr

    Crusatyr GBAtemp Regular

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    I googled "Focused ion beam" and can't figure out how it is used to reprogram read-only memory. Perhaps you had an idea and just wanted people to say "yeah, it could work" despite the fact that literally no one has access to the tools to do so?
     
  7. leafeon34
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    leafeon34 意地悪な男の人

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    I was curious and hoped that an engineer would stumble across this thread and provide an educated response. Someone who knows what he or she is talking about could actually confirm that it will or wont work, explain why and suggest other methods. We have technology capable of moving individual atoms; if you have enough money, there really might be a way to overwrite read only memory. Given that we don't do this already, I knew it probably wouldn't be feasible. I don't want uninformed responses like it might work or the guy above.

    https://www.fei.com/products/fib/optifib/
     
    Last edited by leafeon34, Jun 26, 2019
  8. TerraPhantm

    TerraPhantm GBAtemp Fan

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    I mean sure, using equipment that costs millions of dollars it might be possible.

    You'd be better off buying a bare Tegra chip (or getting one of the Jetson dev kits or something), install said CPU in the Switch, and figure out how to get it to boot Horizon while keeping your boot loader unlocked. And that's all far from trivial.
     
  9. Tilde88

    Tilde88 GBAtemp Regular

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    Do you even derp?
     
  10. ZachyCatGames

    ZachyCatGames GBAtemp Advanced Maniac

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    Hell
    >Is it possible to edit the bootrom
    Possible? Yea. Practical? No, and the system would probably end up in an unusable state

    edit: fixed error
     
    Last edited by ZachyCatGames, Jun 26, 2019
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