In case of Wozniak, he had access to a commercial programmer at work.
Some people did burn the code into electrically programmable PROMs completely by hand, using just a power supply, some wires and switches. Anyone could do this at home, but it was extremely tedious even for a tiny 256 byte chip.
Some people did burn the code into electrically programmable PROMs completely by hand, using just a power supply, some wires and switches. Anyone could do this at home, but it was extremely tedious even for a tiny 256 byte chip.