The Cromemco Z-1 uses an IMSAI chassis, with 22 card slots and a 28 amperes (about 300 watts) power supply. The major innovation of the Z-1 is the use of the 4 Mhz version of the Z-80 processor. It is also equiped with its own 2708 type EPROM burner card. Like the IMSAI, the Basic […]
1975 IMSAI 8080
The IMSAI 8080 was an early microcomputer released in late 1975, based on the Intel 8080 and later 8085 and S-100 bus. It was a clone of its main competitor, the earlier MITS Altair 8800. The IMSAI machine ran a highly modified version of the CP/M operating system called IMDOS. It was developed, manufactured and […]
1974 MITS Altair 8800
The MITS Altair 8800 is a personal computer designed in 1975, based on the Intel 8080 CPU. Originally sold as a kit through the US magazine Popular Electronics, the designers were aiming to sell just a few hundred units, and were surprised when they sold 10 times what they had forecast for the first month. […]
1971 Kenbak-1
The Kenbak-1 is considered the world’s first personal computer. The design was the work of John Blankenbaker of Kenbak Corporation in 1970, and the first sale took place in early 1971. At the time, the system cost US$750. In 1973, Kenbak Corporation closed its doors and production of the Kenbak -1 has been interrupted. Since […]