Web site: (not active)
Origin: USA
Category: Desktop
Desktop environment: CLI
Architecture: Intel 8080
Based on: independent
Wikipedia: PTDOS
Media: Install
The last version | Released: 1978

PTDOS (Processor Technology Disk Operating System) – an operating system created in the late 1970s for computers using the Intel 8080 microprocessor and the Processor Technology Helios II Disk Memory System.

Processor Technology Corporation was a personal computer company founded in April 1975, by Gary Ingram and Bob Marsh in Berkeley, California. Their first product was a 4K byte RAM board that was compatible with the MITS Altair 8800 computer but more reliable than the MITS board. This was followed by a series of memory and I/O boards including a video display module.

The PTDOS was installed on the Sol 20 microcomputer. The Sol 20 microcomputer was a product of the Processor Technology Corporation, circa 1977. The Sol 20 is interesting in that it came at the dawn of the “microcomputer revolution.” It is interesting in that it was the main product of Processor Technology, an archetypal rags to riches to rags startup company. The Sol-20 was produced by the Processor Technology Corporation back in 1977-1979. About 10,000 of them were produced, some as kits, some as pre-built.

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