Quote:
Originally Posted by yyttu";p="
I've got a PMP that is called "Sunplus SPCA536" [...] and I'm really interested in modifying the firmware. I know noone has done it yet, but I think it would be great if we did some R&D  |
I once tried it but that has been a while. Now mine is somehow broken - a flashing accident (iirc there is a thread in this forum that might help you in case you have a similar problem). Actually the bootloader seems to be still alive. I found out some interesting things though:
* the processor core seems to be MIPS compatible (R3000?) with some opcode extensions. Here is a disassmbly of the bootrom code:
http://mitglied.lycos.de/luluba/spca...ormal-rom.html
* There is a dll for usb communication "usb_cam.dll" and I found a matching header file on the net somewhere. This dll basically implements the "usb vendor commands" that can also be found in some ini file that ships with a driver for this device.
Via these commands it should be possible to write software to upload & download data and code to and from the device. I didnt got this to work, but I dont have much knowledge concerning usb programming and stuff, so maybe someone will find out how this has to be done and comes up with firmware tool and maybe its possible to get linux or some other suitable os running on this machine with a little bit of reverseengineering.
regards