Hello everybody!
This is my very first post on your forum, and I don't even know if I'm posting this in the right section.
Recently I downloaded the 3.1.2 firmware, and freaking iTunes denied me downgrading my 4.0 firmware to 3.1.2!
I quickly discovered that this is because Apple have "invalidated" any firmware below 4.0, which I don't see ANY reason to do! - So pissed of as I was, I decided to write my own piece of software that allows the user to downgrade to any firmware version they wish.
Here's a list of the things that (to my understanding) is required to actually bring this software idea to life:
My own USB driver: I expect to write this device driver in Xcode using the IOKit framework.
The device has to be in DFU mode: This is kind of self explanatory, but it is just as much an opportunity to ask a question: Does the device actually have to be connected with iTunes once in DFU mode, to continue the process - or just a computer?
The device's memory map: This also is kind of self explanatory, AND like the above point, just as much an opportunity to ask a question: Does anybody know the memory map of the iPod touch 2G? - Or does anybody know where I can find it?
The first version is only going to support the iPod touch 2G, but I might expand it to support all of the iDevices.
I assume I do, but do I REALLY have to write the USB driver? - I've developed my own GUI OS for PCs before, so it's not because I don't know how to operate in this level of the computer, but just because I know how hard it is to write safe and stable software at that ring level!
If you need any more info, just ask, and I'll be happy to provide it 🙂.
Just in case you are in doubt of what my actual question is, here it is: Am I approaching this right? - Can I actually pull this idea off with what I wrote above?
Best regards,
Benjamin
.
This is my very first post on your forum, and I don't even know if I'm posting this in the right section.
Recently I downloaded the 3.1.2 firmware, and freaking iTunes denied me downgrading my 4.0 firmware to 3.1.2!
I quickly discovered that this is because Apple have "invalidated" any firmware below 4.0, which I don't see ANY reason to do! - So pissed of as I was, I decided to write my own piece of software that allows the user to downgrade to any firmware version they wish.
Here's a list of the things that (to my understanding) is required to actually bring this software idea to life:
- My own USB driver (to establish a connection between my program, and the device).
- The device has to be in DFU mode.
- The device's memory map (so I know where to place the various parts of the decompressed firmware).
My own USB driver: I expect to write this device driver in Xcode using the IOKit framework.
The device has to be in DFU mode: This is kind of self explanatory, but it is just as much an opportunity to ask a question: Does the device actually have to be connected with iTunes once in DFU mode, to continue the process - or just a computer?
The device's memory map: This also is kind of self explanatory, AND like the above point, just as much an opportunity to ask a question: Does anybody know the memory map of the iPod touch 2G? - Or does anybody know where I can find it?
The first version is only going to support the iPod touch 2G, but I might expand it to support all of the iDevices.
I assume I do, but do I REALLY have to write the USB driver? - I've developed my own GUI OS for PCs before, so it's not because I don't know how to operate in this level of the computer, but just because I know how hard it is to write safe and stable software at that ring level!
If you need any more info, just ask, and I'll be happy to provide it 🙂.
Just in case you are in doubt of what my actual question is, here it is: Am I approaching this right? - Can I actually pull this idea off with what I wrote above?
Best regards,
Benjamin
.