Zilog Z80 turns 50 as an open-source replacement heads to drop-in DIP40 silicon — iconic 8-bit CPU launched in July 1976 and was discontinued in 2024 from Latest from Tom's Hardware on 2026-07-19 14:12 (#77374) The original Z80 packed 8,500 transistors on a 4m process and typically ran at 2.5 MHz.
