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JXD301 development report

The JXD301 dev scene is moving slowly, but pointing to the right direction.

Mithris has managed to disassemble the firmware, and found that Block9 seems to being loaded to 0xffa00000, and thus gets booted first, then it inits some stacks and appears to play around with the MMU a bit. He also found block 2 etc, are loaded into RAM, so the initial bootloader must have an initblock that sets that stuff up, so probably that little program at 0xffa00000 is the one responsible for switching applications, etc.

Meanwhile, RobBrown has received his JXD301 and took some very high detailed inner photographs #1 #2 #3 #4 #5 #6 (warning: each photo is 2.5 mbytes sized!). Interestingly there are a few unsoldered points in photograph #6, which might lead to a communication interface.

2 Comments »

  Mark wrote @

help with Dead Blackhawk PMP
my sons Black hawk PMP has died

i thik it has just lost the firmware
i cand find the CD that came with it so not sure if there was a program on that ?
i have downloaded the firmware from your site
can you please advise how to install / refresh it

Thanks

  rlyeh wrote @

Hello Mark
I’m sorry for the delay.

What’s the model of your BlackHawk?

If got no idea, then can you tell me if you got those screens in your handheld?
http://rlyeh.wordpress.com/2007/11/16/just-got-my-jxd-301/

I’d bet my pants that JXD301 and BlackHawk both share the same firmware. Cheap chinese clones you know.

If so, you could try to download the Gemei X760 or the JXD301 firmware as well, since they are both compatible.

Don’t forget to visit the bfdev.wikidot.com website which contains instructions about upgrading the firmware. That works on most clones but you’ll have to guess the correct button layout, since it’s different on every clone.

Hope that helps.


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