Also, you more or less need the binary blob with the license agreement that forbids use on non-Pi boards in order to boot that chip. It runs on an undocumented

Also, you more or less need the binary blob with the license agreement that forbids use on non-Pi boards in order to boot that chip. It runs on an undocumented CPU architecture and initializes a whole bunch of undocumented but essential hardware. There's an open source replacement which is just barely capable of booting Linux and giving a serial console, but the developers basically gave up and recommended people use something like one of the Allwinner chips instead.