The Intel 8080 successor to the Intel 8008 (with which it was Assembly language source compatible[?]). The 8080 (permitted by its large 40 pin DIP packaging) had a 16-bit address bus[?] and an 8-bit data bus. It had seven 8-bit registers[?] (six which could also be combined as three 16-bit registers), a 16-bit stack pointer to memory which replaced the 8008's internal stack and a 16-bit program counter. It also had 256 I/O ports (so I/O devices could be connected without needing to allocate any addressing space as is required for memory mapped devices).
Shortly after the 8080, the Motorola 6800 was introduced.
The first single-board microcomputer was built on the basis of the 8080.
See also: List of Intel microprocessors