DECmate

DECmate. It was a series of word processor and small business computer systems introduced by Digital Equipment Corporation in the early 1980s. Designed as a successor to the dedicated DEC Datasystem 300, the systems were built around the PDP-8 instruction set architecture, utilizing the Intersil 6100 or Harris 6120 microprocessor. Primarily marketed for office automation, they competed with products from IBM, Wang Laboratories, and Xerox in the burgeoning personal computer market.

Overview

The development of the series was driven by Digital Equipment Corporation's strategy to leverage its existing PDP-8 software base for the office environment. Announced in 1980, the initial model was positioned as a high-functionality word processor that could also run business software, bridging the gap between dedicated machines and general-purpose microcomputers. Its introduction coincided with a period of intense competition in office systems, where companies like IBM with its Displaywriter System and Xerox with the Xerox Star were also active. The systems were sold through Digital Equipment Corporation's direct sales force and authorized dealers, targeting professional and legal offices.

Hardware

The core of the original system's hardware was the Intersil 6100 microprocessor, a single-chip implementation of the venerable PDP-8 architecture. Later models would upgrade to the compatible but faster Harris 6120. Standard memory configurations ranged from 64 KB to 256 KB. The primary storage medium was a single or dual 8-inch floppy disk drive, with an optional 5 or 10 MB Hard disk drive offered for the DECmate II and later models. The system unit was integrated with a detachable keyboard and a 12-inch Monochrome monitor displaying 80-column text. Unique features included dedicated function keys for word processor commands and a proprietary LAN capability known as DECnet for connecting multiple systems and printers.

Software

Its primary operating environment was WPS-8 (Word Processing System-8), a menu-driven system that provided sophisticated text editing, formatting, and document management capabilities. For more general business computing, it could run OS/278, an operating system derived from OS/8 for the PDP-8, which supported languages like BASIC and COBOL and applications such as DEC's DATATRIEVE. A key software component was the All-In-1 office automation software, which integrated word processing, email via DECnet, and calendaring. This integration was a direct challenge to office suites from competitors like Wang Laboratories.

Models and variants

The original model, introduced in 1980, was followed by the DECmate II in 1982, which featured the Harris 6120 CPU and support for a Hard disk drive. The DECmate III, released in 1984, was a significant redesign packaged in a compact desktop case resembling the IBM PC AT and included an integrated 3.5-inch microfloppy drive. A related model, the DECmate III+, offered enhanced graphics capabilities. These models were sold alongside and eventually superseded by DEC's Rainbow and VAX-based professional computers as the company's strategy shifted towards industry-standard IBM PC compatibility and more powerful VAX systems.

Legacy and impact

The series is remembered as a capable but ultimately niche product that demonstrated Digital Equipment Corporation's strengths and challenges in adapting to the personal computer revolution. While successful in certain vertical markets like legal offices, it was overshadowed by the rapid adoption of the IBM Personal Computer and its MS-DOS-based clones. The technology and market lessons from these systems influenced the development of later DEC products, including the VT220 terminal and the DECstation line. Today, they are collectible items among enthusiasts of vintage computing, particularly those interested in the PDP-8 architecture and the history of office automation prior to the dominance of the Windows and macOS platforms.

Category:Digital Equipment Corporation hardware Category:Word processors Category:Office equipment Category:1980s computers