Bootloader: what exactly is it?
I know this may be a stupid question, but you know, I'm a web designer, not a board programmer :D I studied elettronic at high school, but I don't remember so much...
So I read here and there that there are two kinds of boards, those with bootloader and those without.
I'm trying to understand what phisically a bootloader is: a hardware device or a code pre-installed in the chip?
If I want to build a key by my own (based on Groopic/pic18f2550 for example), and I don't want to use a programmer (like Art2003), what should I do?
Thanks for your patience :)