Author Topic: Let's hack the HP Prime!  (Read 117504 times)

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Offline critor

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Re: Let's hack the HP Prime!
« Reply #15 on: August 19, 2013, 01:20:39 pm »
What we have is clearly neither the final tool, nor the final OS format.
So I cannot give a final answer to your question.
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Offline DJ Omnimaga

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Re: Re: Let's hack the HP Prime!
« Reply #16 on: August 19, 2013, 01:55:10 pm »
Is there a way to enter maintenance/OS recovery modes in the emulator?

Offline Keoni29

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Re: Let's hack the HP Prime!
« Reply #17 on: August 20, 2013, 01:05:25 am »
Did the "emulator" come with a reset button on the back?
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Offline Adriweb

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Re: Let's hack the HP Prime!
« Reply #18 on: August 20, 2013, 02:20:18 am »
No, it's "just" a simulator.
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Offline critor

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Re: Let's hack the HP Prime!
« Reply #19 on: August 20, 2013, 08:21:38 am »
Guidebook, firmware and linking software did leak last week on the HP FTP server and were quickly removed:
http://tiplanet.org/forum/viewtopic.php?f=55&t=12867&lang=en
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Offline SpiroH

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Re: Let's hack the HP Prime!
« Reply #20 on: August 20, 2013, 09:16:19 am »
Guidebook, firmware and linking software did leak last week on the HP FTP server and were quickly removed:
http://tiplanet.org/forum/viewtopic.php?f=55&t=12867&lang=en
Come on, it can only have been done on purpose, IMHO!
BTW, has any of you managed to get hold of the "HP-Connectivity Kit"? That would be really interesting. And also the booter code, of course!

Good news, nevertheless! ;)

Offline Lionel Debroux

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Re: Let's hack the HP Prime!
« Reply #21 on: August 20, 2013, 11:28:24 am »
Some of the firmware upgrades contain a file named "BXCBOOT0.bin".
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Offline critor

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Re: Let's hack the HP Prime!
« Reply #22 on: August 20, 2013, 11:31:00 am »
Which is the Boot Code.
V11 in the leaked firmware.
V13 in the current zip-password-protected firmware.
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Offline Adriweb

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Re: Let's hack the HP Prime!
« Reply #23 on: August 20, 2013, 12:13:04 pm »
Lionel and I started an article about the file formats used for the Prime's data :
http://tiplanet.org/hpwiki/HP_Prime/File_Format#Known_file_types

Not extremely related to the Prime hacking in itself (well, who knows ?), but still good to know :)

I've especially worked on the list format, it was quite easy to "decrypt", once knowing how to procude these .hplist files correctly from the HP Connectivity Kit (the calc simulator software is more annoying to work with - we/I'm not sure exactly when it decides to save stuff...)

I'll definitely look at the rest of the formats when I have some time.
« Last Edit: August 20, 2013, 12:14:31 pm by adriweb »
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Offline SpiroH

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Re: Let's hack the HP Prime!
« Reply #24 on: August 20, 2013, 12:19:00 pm »
Thanks for the input.
Here are some thoughts on how i think this hacking business could eventually proceed. Someone ought to write some sort of roadmap. To start with (let's take it easy :)), we need to figure out the HP Prime's system:
    architecture surrounding the microcontroller (S3C2416).
    memory map: ROM, RAM, IO, etc.
During this process, some ARM disassembly will certainly be required. This step will be a bit awkward to accomplish here because we'll need to abide by the forum rules, but still feasible by other means.

Please feel free to add your contributions/advice, because i'm sure i won't have enough free time to lead this process.

Offline Lionel Debroux

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Re: Let's hack the HP Prime!
« Reply #25 on: August 20, 2013, 12:28:34 pm »
Chances are that people have started proceeding a while before you posted a roadmap ;)
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Offline SpiroH

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Re: Let's hack the HP Prime!
« Reply #26 on: August 20, 2013, 12:35:53 pm »
Yeah, i thought so too, but i am not aware of it. That's nice to hear, though! But don't you think we a need some common place to share that valuable info?

Offline Lionel Debroux

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Re: Let's hack the HP Prime!
« Reply #27 on: August 20, 2013, 12:41:19 pm »
That's probably the goal of this topic, as stated by DJ in the first post ?
The hpwiki could contain such information as well.
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Offline DJ Omnimaga

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Re: Re: Let's hack the HP Prime!
« Reply #28 on: August 20, 2013, 12:45:15 pm »
Just make sure to not blatantly explain how to circumvent the teacher mode during exams. :P
Did the "emulator" come with a reset button on the back?
nah but there is a reset option in the menus. The thing, though, is that even if it actually worked like on the calc, it would be next to impossible to do the key combination and clicking that option simultaneously.

Offline critor

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Re: Let's hack the HP Prime!
« Reply #29 on: August 20, 2013, 12:47:32 pm »
We've never been interested into that, not even on the TI-Nspire.
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