Is it possible to reprogram an Arduino's microcontroller without another chip or Arduino?
No, that answers my question. I was hoping one could edit the source code and easily upload it to the microcontroller, but as I figured, that's not possible. Thanks anyways!
What I mean, is can I reprogram the microcontroller without a breadboard, second microcontroller, or a dedicated programmer. Just using a computer, the Arduino, and the chip it came with.
So how exactly would I compile the bootloader source and upload it to my Uno? Avr-gcc and avrdude?