My english is bad,sorry...hehe~
somedays ago i bought a a480,and i want to use CHDK,too. So I want to dump the firmwave of it.
i try many times but all they faild.
I use format the 32M sd card as FAT . then use bootable write the "BOOTDISk" to offset 0x40.
at first i put some chdk files in the card,lock the card.then turn on the cam.some times the cam died,i press the review button,but the screen is not light.And any key doesen't work.the only way i can do is taking out the batterys.
then i put the diskboot.bin in card,not matter VXWORKS or DRYOS,when i start cam with review. it shows "locked card". alse i tried use CardTricks 144 to do it ,but the same result.
last i use the newDrosy.maybe it works, the screen is black and any key doesn't work.some min later , i put out the sd card, open the empty.dum with UE,but it is full of 0.
what should i do ? thanks.