Scelbi Computer Consulting

Scelbi Computer Consulting
Name	Scelbi Computer Consulting
Industry	Computer consulting
Founded	1974
Founder	Robert A. Mocek
Headquarters	Eugene, Oregon
Products	Scelbi-8H microcomputer kits, consulting services
Key people	Robert A. Mocek
Fate	Dissolved (late 1970s)

Scelbi Computer Consulting was an early American microcomputer company and consulting firm founded in 1974 that played a formative role in the nascent personal computing movement. The firm is best known for producing the Scelbi-8H microcomputer kit based on the Intel 8008 microprocessor and for offering technical consulting and kit-assembly services to hobbyists and small organizations. Through product sales, technical documentation, and community engagement, the company intersected with contemporaneous developments in computing, electronics, and hobbyist culture.

History

Scelbi Computer Consulting was established in 1974 in Eugene, Oregon by Robert A. Mocek during the rise of microprocessor development alongside Intel's rollout of the Intel 8008 and amid innovation driven by firms like MITS and Digital Equipment Corporation. The company emerged as part of a cohort that included Altair 8800, Processor Technology, North Star Computers, and IMSAI in the mid-1970s hobbyist market. Early activities tied Scelbi to the broader ecosystems fostered by publications such as Popular Electronics, Byte, and Radio-Electronics, and groups like the Homebrew Computer Club and Southern California Computer Society where microcomputer kits and published schematics circulated. Scelbi operated throughout the mid-1970s, offering hardware kits, technical manuals, and consulting until its operations wound down in the late 1970s amid consolidation exemplified by acquisitions and market shifts involving companies like Commodore International, Apple Computer, and Tandy Corporation.

Products and Services

The firm's flagship product was the Scelbi-8H, a kit-built microcomputer centered on the Intel 8008 microprocessor, marketed alongside the Scelbi-8B and various accessories. Product offerings included printed circuit boards, power supplies, front panels, memory modules, and chassis components comparable to kits from MITS Altair, Processor Technology Sol-20, and SWTPC. Scelbi sold assembled systems, mail-order kits, and technical documentation that paralleled resources published by Popular Electronics, Creative Computing, and Dr. Dobb's Journal. Consulting services ranged from circuit debugging and hardware modification to software assistance for assembly-language programming tied to the Intel 8008 instruction set, paralleling services rendered by smaller firms such as Sculptured Software and IMS Associates consultants. Scelbi also provided conversion services for customers migrating to later processors like the Intel 8080 or connecting to peripherals common in the era produced by vendors such as DEC and Zenith Data Systems.

Technology and Architecture

Scelbi systems were centered on the 8-bit Intel 8008 microprocessor, reflecting contemporaneous architectures like those found in the Mark-8 and Altair 8800. The Scelbi-8H featured front-panel switches and LEDs, memory addressed with early static RAM and dynamic RAM modules, and I/O expansion via edge connectors compatible with third-party peripheral cards from vendors such as North Star and MITS. Firmware and monitor software were distributed in PROMs and printed listings similar to those circulated in Byte and Dr. Dobb's Journal, enabling users to bootstrap systems, run machine-code monitors, and develop assembly-language programs. Peripheral interfacing supported teletype-style serial terminals, cassette storage interfaces akin to those used by Commodore PET and Apple I hobbyists, and early printer connections compatible with devices from Centronics and Epson. Scelbi’s technical documentation referenced schematics, timing diagrams, and microcode-level details that paralleled the engineering materials shared among early microcomputer pioneers such as Gordon Bell and Edson de Castro.

Business Model and Market Impact

Scelbi’s business model combined mail-order kit sales, limited-volume assembly, and fee-based consulting, mirroring distribution strategies used by MITS and small-system vendors like North Star Computers. By targeting hobbyists, educators, and small laboratories, Scelbi operated within the early microcomputer aftermarket that fed into larger markets later captured by Apple II, TRS-80, and Commodore PET platforms. The company’s presence in kit markets helped validate demand for user-assembled systems and contributed to price-pressure and feature-competition among contemporaries including Altair, Processor Technology, and IMS Associates (IMSAI). Though Scelbi remained small compared to later incumbents such as IBM and Hewlett-Packard, its role in disseminating microprocessor-based systems and documentation amplified community-driven innovation and supported nascent software ecosystems that would be scaled by firms like Microsoft and Digital Research.

Key People and Leadership

The principal founder and operator was Robert A. Mocek, whose direction aligned Scelbi with other early microcomputer entrepreneurs such as Ed Roberts of MITS and Paul Allen and Steve Jobs of Apple Computer in contemporaneous entrepreneurial spirit. Technical contributors and consultants who worked with the firm formed part of the broader network of engineers and hobbyists that included figures associated with Homebrew Computer Club, Gordon Bell, Steve Wozniak, and Bill Gates by virtue of overlapping technical communities and publication channels. Scelbi’s small leadership team coordinated product design, mail-order logistics, and customer support, performing roles analogous to founders at firms like Processor Technology and IMS Associates.

Legacy and Influence on Personal Computing

Although short-lived, Scelbi’s influence is preserved through surviving Scelbi-8H units, technical manuals, and its role in the culture of kit-based computing that spawned modern personal computing. The company contributed to a lineage that connects early microprocessor experiments such as the Intel 8008 and the Mark-8 to subsequent industry milestones like the Altair 8800, Apple I, and IBM PC. Historians and collectors trace Scelbi’s artifacts alongside collections featuring Stanford University archives, Smithsonian Institution exhibits, and private collectors who curate early hardware from DEC, MITS, and Hewlett-Packard. The firm’s documentation and community engagement exemplify how small vendors and consultants catalyzed technical literacy and hardware tinkering that fed into the broader commercialization trajectories led by Apple Computer, Microsoft, IBM, and Commodore International.

Category:Defunct computer companies of the United States