Hacking Downgrade without BOOT1/2

[Raugo]

Kan you give some more information about modification of boot1?

I will try. Open the donor boot0 with a hex editor and copy the offset 450-4FF and search it in the file, you will see a copy of this value in some place in the offset 180000+ memorize the offset where this appear. Then copy all the data from the offset 180000 until the end of the file from your boot0 to the same place in the donor boot0. Now copy the data of the offset that you memorized to the offset 450-4FF and save it. With this you have a boot0 ready to your console with the firmware of the donor boot0.

 

[xHR]

Ok, I got this thing to work. Bad news is that I did it only with 6.1 backup. Rajkosto's guide help alot with boot0\1 restoring, but was ussless with downgrading. I made all like guide said but console was freezing in hekata on access to package2 string (I use atmosphere 075 with kips from kosmos). Then I restored my 6.1 nand backup.

 

[k1ra]

Got my Switch working again with guide from https://guide.sdsetup.com/#/manual620downgrade