Rockbox mail archive
Subject: Re: building bootloader from source (h300)
Re: building bootloader from source (h300)
On Mon, Apr 7, 2008 at 12:18 AM, Daniel Dalton <d.dalton_at_iinet.net.au> wrote:
> > That is the problem. You can't reanimate a bricked h300 without special
> What equipment is needed? And what is the process of unbricking a h300?
> Is it a long and complicated process...?
You need to access the debug module of the CPU from "outside", i.e.
via hardware. Freescale calls this part of the hardware BDM
(Background Debug Module), other manufacturers often call it JTAG
(though JTAG itself is only the working group, usually it refers to
IEEE 1149.1). A device for accessing this hardware port is usually
processor-specific (at best family-specific) and usually not too
cheap. A starting point for reading up is
http://en.wikipedia.org/wiki/In-circuit_emulator in case you're
In case of the H300 this means you need to open the player and solder
several wires to connect the BDM. Due to the size of actual circuits
this isn't an easy task even for sighted people.
Received on 2008-04-07
Page was last modified "Jan 10 2012" The Rockbox Crew