I guess that leaves only few possibilities:
1) wrong diskboot.bin - are you sure you got it from an ixus860_sd870-100c.zip ?
2) you are the (unlucky) owner of a different firmware
3) try -if possible- a different card, preferably 2 Gb or less, some cards
don't allow writing to their bootsector (that's rare though)
PS: just thought of sth, if you formatted after make bootable, you'll need to do it again.
so: format -> make bootable -> copy diskboot.bin to card
Thanks whim, my replies as follow
1) I got the diskboot.bin file from allbest-ixus860_sd870-100c-51-485 so i guess that is the right one
3) Ok, I'll try it with another card, mine is a Toshiba 2GB card.
And yes I do make the card bootable after every FAT16 formatting
...what sd card do you use (capacity/type) ? - you need a non-SDHC card with <= 4GB, for SDHC cards with >4GB the card have to be prepared for multi partition support...
Try it with the sd card shipped with the camera (16/32MB), with cardtricks format it, make it bootable, copy the (fresh downloaded) diskboot.bin to the root of your card, lock the card...
Oh, hi wim, you were faster...
2) you are the (unlucky) owner of a different firmware hmmm - then the cam would crash, but as i understood it boots up as normal, so this seems not to be the problem...
Alright I'll give it another go with the original card that came with the cam. And as for the cam it booted normal after i put in the diskboot.bin SD card.
Thank you for all your help guys, really appreciate this. Will report back with the tests
It does make sense that the SD card is at fault since i couldn't even do the firmware request.
Back to work!LATEST UPDATE:
Problem did lie in the SD card, after i used the stock SD card CHDK loaded just fine! Firmware check works too!
So the lesson i learned here is to not get anymore Toshiba SD cards! ehehe
Thanks so much for the help guys, time for some CHDK goodness!