Intel 8080
The Intel 8080 is an eight-bit microprocessor designed and manufactured by Intel in the mid 1970s.[1][2][3][4][5] It was designed by Federico Faggin and Masatoshi Shima, who had designed its lineal ancestors, the intel 4004 and intel 8008.
| specification | value |
|---|---|
| number of transistors | 6,000 transistor on die |
| clock speed | 2 megahertz |
| instruction set | 75 instructions |
| Registers | seven eight bit registers.[6] |
| introduction date | January 4, 1974 |
| initial cost | $360 each |
Like rival microprocessors like the Motorola 6800, the Intel 8080 used registers that were only eight bits wide.
Zilog later produced a object compatible replacement, the Zilog Z80, with some extended features.
The Altair, Imsai and Tandy Radio Shack TRS80 microcomputer were built around the intel 8080.[7]
The 8080 is the lineal ancestor of intel's later designs, the 8088, 8086, 186, 286, 386, 486 and all of intel's Pentium processors.[6] The 8080 was the lineal descendant of the Intel 4004 and Intel 8008 microprocessors.[7]
Later integrated circuits intended for embedded computer applications, like the Intel 8052, incorporated the intel 8080 architecture, memory, and what had previously been various support chips on a single chip, allowing a "computer on a chip".[5] The 8052 was embedded in non-computer devices, like microwave ovens, and electronic fuel ignitions.
References
[edit | edit source]- ↑ Daniela Morescalchi (2024-12-16). "50 Years Ago: Celebrating the Influential Intel 8080". intel. Archived from the original on 2026-04-17. Retrieved 2026-08-30.
- ↑
D. M. G. Preethichandra (November 2021). "Z80—The 1970s Microprocessor Still Alive". IEEE Micro. IEEE Computer Society. 41: 156–157. doi:10.1109/MM.2021.3115609. Archived from the original on 2026-08-23. Retrieved 2026-08-30.
He managed to realize (in hardware) all these with 8,200 transistors in a single chip where the competitor 8080 had only 4,800 transistors.
- ↑ "Intel 8080A Microprocessor". Smithsonian Institution. Retrieved 2026-08-30.
- ↑
"Intel introduces the 8080 microprocessor - Event - Computing History". Computing History. Archived from the original on 2024-06-26. Retrieved 2026-08-30.
Designed by Federico Faggin and Masatoshi Shima, the Intel 8080 was the successor to the earlier 8008 processor.
- ↑ 5.0 5.1
"The Industrial Era: 1974 - 1975". History of Computing. Archived from the original on 2001-02-18. Retrieved 2008-04-15.
18 June 1974, INTEL introduces the 8080 microprocessor, an improved 8 bit version. This chip has a price tag of "just" 360 U$. The processor contains a Kernel of 75 instructions, the so called micro code. It is five times as fast as the 8008 with 3 MIPS(21). It addresses a memory of 64.000 bytes(22). The designers and marketing people are thinking they have given the final solution to the still rising demand for computing power (64Kb address). This monumental mistake will have catastrophic results towards further development of better(faster) chips and software development for the next few decades.
- ↑ 6.0 6.1
"A Brief Summary of the first 20 years of Microprocessor Evolution (1971 -1993)". University of Bolton. Archived from the original on 2007-12-08. Retrieved 2008-03-01.
The processor had seven 8-bit registers, six of which could be combined into three 16-bit register pairs.
- ↑ 7.0 7.1
"Microprocessor hall of fame". Intel Museum. Archived from the original on 2008-04-11. Retrieved 2008-04-15.
The 8080 became the brains of the first personal computer--the Altair, allegedly named for a destination of the Starship Enterprise from the Star Trek television show.