Hardware Hacking Switch OLED 256gb NAND upgrade

binkinator

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I don't know where the problem is.
buy one of these emmc's.

Hynix
H26T99001MCR 256gb
H26T87001CMR 128gb

SanDisk
SDINBDA6-256G
SDINBDA6-128G
SDINBDA4-256G
SDINBDD4-256G crap firmware!!! Don't buy!!!

Samsung
KLMEG8UCTA-B041 256gb new generation
KLMEG8UERM-C041 256gb old generation
KLMDG4UCTA-B041 128GB
KLMDG4UCTB-B041 128GB

Toshiba/Kioxia
THGAMRT0T43BAIR 128GB

FORESEE
FEMDNN256G-A3A44

Buy this emmc reader for switch.
Klick me
Solder your original emmc to the daughter bord and dump all your partitions from the chip. Also boot0/1 partitions.
Do this under Ubuntu.
Then solder your new emmc to the daughter bord and copy all the partitions back.
Then solder the emmc to your OLED.

You can also use a old erista switch for it.

if you want to do this more often you should buy an emmc reader.
Klick
But you need a special notebook SD card reader or the reader from the ali link above.
On xianyu/Idlefish you can find a usb version from a emmc reader for a good price.
Klick
Or here
Klick

btw.
Hekate restores the emmc backup whiteout problems to a bigger emmc.
Do these chips and emmc reader work in V1 Erista too or are they specific for each model?
 

evil_santa

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Could you explain this part better?
Just writing the backup of boot0/1.bin by hekate isn't enough?
Sure no problem.

The sxcore/Hwfly chips glitching the bootloader on the boot0 partition.
if there is no data on it, it cannot glitch either.

but!!!
if you use this spacecraft nx mod in the latest version the emmc can also be completely empty.
https://github.com/hwfly-nx/firmware/releases

this is achieved by writing the bct to the emmc if it is not available.
https://github.com/hwfly-nx/firmwar...d2434c933f8c9bd3f7/firmware/src/payload.c#L58

so summarized again. every modchip whether sx core/light or hwfly core/light/OLED needs a described boot0 partition.
or your modchip has flashed the linked spacecraft version.
 
Last edited by evil_santa,

zal16

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Sure no problem.

The sxcore/Hwfly chips glitching the bootloader on the boot0 partition.
if there is no data on it, it cannot glitch either.

but!!!
if you use this spacecraft nx mod in the latest version the emmc can also be completely empty.
https://github.com/hwfly-nx/firmware/releases

this is achieved by writing the bct to the emmc if it is not available.
https://github.com/hwfly-nx/firmwar...d2434c933f8c9bd3f7/firmware/src/payload.c#L58

so summarized again. every modchip whether sx core/light or hwfly core/light/OLED needs a described boot0 partition.
or your modchip has flashed the linked spacecraft version.
Thanks!

doom95 showed me this firmware mod too, i only waiting my chip arrives to make the NAND swap.
 

zal16

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Thanks!

doom95 showed me this firmware mod too, i only waiting my chip arrives to make the NAND swap.
Finally, It arrives. Now i need to find someone to solder it for me.
 

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gutoblauth

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Any updates on your NAND upgrade?
I'm also from Brazil, aiming on upgrading from V1 Erista to OLED and maybe upgrading the NAND .
Which part/state of Brazil do you live? I'm from RS.
 

binkinator

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Hello @gutoblauth
i'm from Recife-PE, tomorrow I will go to a cell phone store here in town, so that the guy can change eMMC.

EvilSanta told me about people putting L4T and Android on eMMC so I think I have convinced myself of a use case for a 256G eMMC.

How’s your project going? We’re still out here rooting for your success!
 

Jorgetest

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Hello, could someone help me please, I have a big question that won't let me sleep xd, I want to buy a hwfly oled v4 chip, I have asked in a couple of stores the pre-installed firmware, in the first store they told me that it has the spacecraft 0.7.0 installed and the second store spacecraft 0.3.0, the second store told me that 0.7.0 is not the best and that they only accept official firmware pre-installed from the factory, which one should I buy? the second store is supposed to be hwfly official store on aliexpress
 

zal16

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EvilSanta told me about people putting L4T and Android on eMMC so I think I have convinced myself of a use case for a 256G eMMC.

How’s your project going? We’re still out here rooting for your success!
Still no success.
The guy at the store didn't know how to solder correctly, and after 3 attempts, he gave up and gave me back the two emmcs (the 256GB and the original 64GB) and the empty motherboard

I ended up having to buy a heat gun, stencil, solde paste, flux and try the soldering myself.

After many soldering attempts, I ended up getting it working for a day, but the next day the emmc died. the cause of this may have been the excessive attempts I made (the heat may have deteriorated the IC).

I ended up buying a second emmc but it should still arrive next week
 
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