Cromemco

The collaboration that was to become Cromemco began in 1970 when Harry Garland and Roger Melen, graduate students at Stanford University, began working on a series of articles for Popular Electronics magazine. These articles described construction projects for the electronic hobbyist.

Since it was sometimes difficult for the hobbyist to find the needed parts for these projects, Garland and Melen licensed third-party suppliers to provide kits of parts. In 1973 a kit for one of these projects, an “Op Amp Tester”, was sold by a company called MITS which would later launch a revolutionary microcomputer on the cover of Popular Electronics.

In 1974, Roger Melen was visiting the New York editorial offices of Popular Electronics where he saw a prototype of the MITS Altair microcomputer. Melen was so impressed with this machine that he changed his return flight to California to go through Albuquerque, where he met with Ed Roberts, the president of MITS. At that meeting, Roberts encouraged Melen to develop add-on products for the Altair, beginning with the Cyclops digital camera that was slated to appear in the February 1975 issue of Popular Electronics.

On returning to California, Melen and Garland formed a partnership to produce the Cyclops camera and future microcomputer products. They named the company “Cromemco” after the Stanford dorm (Crothers Memorial Hall) where they first began their collaboration.

Melen and Garland began work on the Cyclops Camera interface for the Altair, and this spawned several other projects for their young company. There was no convenient way to store software for the Altair, other than on punched paper tape. To remedy this problem Melen and Garland went to work on designing a programmable read-only memory card they called the “Bytesaver.” The Bytesaver also could support a resident program that allowed the computer to function immediately when it was powered up, without having to first manually load a bootstrap program. The Bytesaver proved to be a very popular peripheral.

There was also no way to see a Cyclops image stored in the Altair. So work began on a graphics interface card which could connect the Altair to a color TV set. This graphics interface, called the Dazzler, was introduced in the February 1976 issue of Popular Electronics.

One use for an Altair Computer with a Dazzler was to play games. But there was no way to interface a game console or joystick to the Altair. So the next project was to design a joystick console and an interface card that supported an 8-bit digital channel and seven analog channels (called the D+7A). The D+7A could do much more than just interface a joystick, however, and it was this card that allowed the Altair to be connected to the world of data acquisition and industrial computing.

Cromemco called themselves “Specialists in Computer Peripherals” and had a reputation for innovative designs and quality construction. They were, however, just a few steps away from offering their own computer system based on the Altair computer bus structure, named by Garland and Melen the "S-100 bus".