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So where does the firmware reside? On the sd card/usb drive? Or on a chip on-board? Or somewhere else I haven't thought of?
by cogburnd02 6y ago
So where does the firmware reside? On the sd card/usb drive? Or on a chip on-board? Or somewhere else I haven't thought of?
- yjftsjthsd-h 6y agoI believe the main blob is loaded from the SD card and boots the GPU, which then starts the CPU and loads the OS (the Pi architecture is weird), although I suppose there must be some tiny blob on a chip on the actual Pi board to load that stage from the SD card. There's an attempt to make an replacement for the part on the SD card: https://github.com/christinaa/rpi-open-firmware https://github.com/christinaa/rpi-open-firmware