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The Altair 8800 is a microcomputer designed in 1974 by MITS and based on the Intel 8080 CPU. [2] Interest grew quickly after it was featured on the cover of the January 1975 issue of Popular Electronics [ 3 ] and was sold by mail order through advertisements there, in Radio-Electronics , and in other hobbyist magazines.
The S-100 bus or Altair bus, IEEE 696-1983 (inactive-withdrawn), is an early computer bus designed in 1974 as a part of the Altair 8800. The S-100 bus was the first industry standard expansion bus for the microcomputer industry. S-100 computers, consisting of processor and peripheral cards, were produced by a number of manufacturers.
Intel had announced the 8080 chip, and compared to the 4004 to which IMS Associates had been first introduced, it looked like a "real computer". Full-scale development of the IMSAI 8080 was put into action using the existing Altair 8800's S-100 bus, and by October 1975 an ad was placed in Popular Electronics, receiving positive reactions. [5]
The technical manuals for the Altair 8800 provided electrical schematics of the 100 pin computer bus allowing others to design compatible boards. There was not a proper technical standard at the time and some "compatible" boards did not work with other "compatible" boards. Later, the industry developed the S-100 bus standard. [58]
The 8080 was used in many early microcomputers, such as the MITS Altair 8800 Computer, Processor Technology SOL-20 Terminal Computer and IMSAI 8080 Microcomputer, forming the basis for machines running the CP/M operating system (the later, almost fully compatible and more able, Zilog Z80 processor would capitalize on this, with Z80 and CP/M ...
The January 1975 cover of Popular Electronics featured Roberts' Altair 8800 computer. [30] Roberts asked Mims to write the Altair 8800 user’s manual in return for an assembled Altair, which Mims donated to the Smithsonian Institution’s National Museum of American History together with many original MITS documents and his high school ...
They were unsuccessful at that venture but later created the Altair 8800 computer kit that sparked the home computer revolution. The construction projects in Electronics Illustrated were assembled and checked by the editors. The articles had numerous photos and always included a wiring diagram in addition to the schematic.
For some time there was a major market for assembled versions of the Altair 8800, a market that grew significantly through the late 1970s and into the early 1980s. The introduction of three computers aimed at personal users in 1977, the Radio Shack TRS-80 , Apple II , and Commodore PET , significantly changed the American microcomputer market ...