|<< Intel 8080 >>|
Intel 8080A processor
|Production:||1974 to 1990s|
|Processor clock:||2 MHz to 3.125 MHz|
|Manufacturing :||6 µm, NMOS|
|Instruction set :||Intel 8 bit|
The Intel 8080 is a 1974 introduced 8-bit - microprocessor in NMOS technology from Intel . It is widely regarded as the first full-fledged microprocessor. It was the successor to the Intel 8008 and was source code compatible with its instruction set, but not binary compatible, so programs had to be reassembled .
Architecture and use
It had seven 8-bit registers, six of which could be combined into three 16-bit registers, as well as a stack pointer and a program pointer with 16 bits each. The CP / M operating system was developed for the 8080 and was the predominant system for microcomputers for nearly a decade , much like MS-DOS later .
In addition to the processor, a system with the 8080 also required two further components: a separate clock generator ( 8224 ) and a bus controller ( 8228 ). In 1976 the successor 8085 appeared , which already contained their functions. However, it was not very successful, as in the same year Zilog brought out an 8080-compatible, but greatly expanded processor with the Z80 . At the end of the 1970s, the KR580VM80A, compatible with the 8080, appeared in the Soviet Union . and in the early 1980s the MHB8080A appeared in Czechoslovakia .
- Supply voltages: +12 V, +5 V, −5 V
- Max. Clock frequency: 2 MHz
- Number of transistors: 6000 at 6 µm
- Data bus: 8 bit
- Address bus: 16 bit
- Addressable memory: 64 KB
- Addressable I / O area: 256 B
Clone NEC 8080AF
- Intel 8251 serial interface
- Intel 8253 counter / timer
- Intel 8255 parallel interface
- Intel 8257 DMA controller
- Intel 8259 interrupt control
- Intel 8080 - Collectors website with lots of pictures
- Patent US4010449 : MOS computer employing a plurality of separate chips. Published March 1, 1977 , Inventors: Federico Faggin, Masatoshi Shima, Stanley Mazor.
- Online emulator