Ferranti article on Hackaday
Ferranti article on Hackaday
I saw an interesting article on Hackaday about Ferranti and the Gem Mill plant https://hackaday.com/2021/09/15/ferrantis-ghost/ . It does mention the ZX81 ULA.
2X Timex Sinclair 1000, ZX81, ZX80Core, 5X 16K Ram Pack, ZXBlast, ZX P file to Ear Input Signal Converter, Elf II