 Transputers could boot from memory as do most computers, or over network links, so one transputer could start up a whole network.There was a pin called BootFromROM that, when asserted, caused the transputer to start two bytes from the top of memory (sufficient for up to a 256 byte backward jump, usually out of ROM).When this pin was not asserted, the first byte that arrived down any link was the length of a bootstrap to be downloaded, which was placed in low memory and run.