processor The successor to the Intel 8008. The 8080 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 programcounter. 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) and a signal pin that

allowed the stack to occupy a separate bank of memory.