Sorry, my mistake. It _did_ start diskboot.bin before (and I already recovered from my faults once), but this time I can't turn it on. I press a button and nothing happens.
I doubt I can solder any wires to those tiny pins. I don't have such a skill.
Did you have an LED blink loop early in the diskboot (preferably in loader)? Otherwise, this isn't definitive, because it could crash after boot without any obvious sign of booting.
Maybe you have some old hardware lying around with as similar board you can practice on?
there was definitely a blink code right before before bss copy. But I am not sure about the loader. most probably yes, i will check.
if you are talking about Canon P&S camera, I doubt I can find an _old_ DIGIC 6 hardware. but the connector looks the same as for DIGIC 4, i will try to find something to practice. it is a good idea.
Canon Digic is a modified Texas Instruments ARM single board computer.
Quote from: Ant on 25 / October / 2017, 05:56:10Quote from: hardlock on 25 / October / 2017, 00:58:10it start definitely (e.g. I can blink a led, call some funcs from the firmware) but i did not try to return from it.You did not tell us how you did it.Maybe it's right time to start porting the CHDK on sx710?In my case(erased sector with adjustment data) it was enough to use CHDK with modified "boot.c"...Sorry, my mistake. It _did_ start diskboot.bin before (and I already recovered from my faults once), but this time I can't turn it on. I press a button and nothing happens. about porting: at the moment CHDK looks too overhelming for me. 100s of functions to map? ...... but I can help someone who is in progress, e.g. i can manually find a function that was already mapped in one camera in another one. Will be glad to help.
Quote from: hardlock on 25 / October / 2017, 00:58:10it start definitely (e.g. I can blink a led, call some funcs from the firmware) but i did not try to return from it.You did not tell us how you did it.Maybe it's right time to start porting the CHDK on sx710?In my case(erased sector with adjustment data) it was enough to use CHDK with modified "boot.c"...
it start definitely (e.g. I can blink a led, call some funcs from the firmware) but i did not try to return from it.
Did you have an LED blink loop early in the diskboot (preferably in loader)? Otherwise, this isn't definitive, because it could crash after boot without any obvious sign of booting.If you tell us what range of ROM you think you damaged, we would have a better idea of the impacts.Maybe you have some old hardware lying around with as similar board you can practice on?
Loopback trick does not obviously start diskboot.bin
Quote from: hardlock on 25 / October / 2017, 17:34:13there was definitely a blink code right before before bss copy. But I am not sure about the loader. most probably yes, i will check. That should be good enough, it would have to get to the point where diskboot is loaded in the original firmware.Quoteif you are talking about Canon P&S camera, I doubt I can find an _old_ DIGIC 6 hardware. but the connector looks the same as for DIGIC 4, i will try to find something to practice. it is a good idea. I actually meant anything with a similar board, could be on old router or video card or HD logic board. Just something dead/obsolete to practice the mechanics on enough to decide whether you can safely do it on your camera.QuoteCanon Digic is a modified Texas Instruments ARM single board computer. I was not aware of this. Do you have a specific source or evidence?
Ref Sx700:- ... It looks like the Sx700 porting attempt is based on the Sx280 and only "boot.c" has been attempRe:- 100s of (Sx280 & Sx700) functions to (re) map? to the Sx710. With your version boot.c how many did you attempt and what software tools did you use.Could you post a copy of your version boot.c. It might not be so "overwelming", as you think, to finish off the Sx710 boot.c.Another thing, about the abandoned Sx700 porting attempt, is that the CHDK sig-find is now much more advanced.H-H
Was it encoded? I may be wrong, but I suspect the rescue loader expects an unencoded diskboot, in which case a normal dancingbits'd one would fail. Might be worth a try if you haven't already.
Also note Digic 6 loaders mostly call a cache related function in ROM, which would fail if that part of ROM is damaged. You can copy it inline like the M3 port.
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