Xebec Corporation

Xebec Corporation
Company type	Public
Industry	Computer hardware
Predecessor	Microcomputer Systems Corporation
Founded	1969 in Sunnyvale, California, United States
Founder	James "Jim" Toreson (founder of Microcomputer Systems Corporation)
Defunct	July 31, 1989
Headquarters	Sunnyvale, California, United States
Area served	United States
Key people	James "Jim" Toreson (founder)
Products	Hard disk controller integrated circuits, hard drives, disk controller boards, tape backup products
Number of employees	1,200 (1984)

Xebec Corporation, originally known as Microcomputer Systems Corporation, was a U.S.-based computer hardware manufacturer operating from 1969 until 1990, primarily recognized for its data storage solutions, notably hard disk controller integrated circuits. Among its prominent clients was IBM, which extensively incorporated Xebec’s disk controllers in the 1983 IBM PC XT, marking IBM’s initial personal computer equipped with a factory-installed hard drive.

Origins and Early Development (1969–1983)

Xebec’s origins trace back to two Silicon Valley enterprises: Xebec Corporation, established in 1969 in Sunnyvale, California, and Microcomputer Systems Corporation (MSC), founded in 1974 by entrepreneur James "Jim" Toreson in Santa Clara. While Xebec’s product lineup included various hardware such as optical character recognition systems and disk controllers, MSC concentrated on disk controller technology for mainframe and minicomputers. By 1976, MSC had moved to Sunnyvale and employed a workforce of 20.

In July 1981, MSC acquired the financially troubled Xebec and integrated it as a division dedicated to hard drives and disk controller boards based on MSC’s proprietary patents. MSC discarded the earlier technological assets of Xebec, which Toreson described in 1982 as "junk," underscoring MSC’s more advanced technology despite lacking venture capital funding.

In 1982, under MSC’s direction, Xebec introduced its initial 5.25-inch hard drives and disk controllers tailored for the Apple II at the West Coast Computer Faire, achieving notable market success. This expansion led to relocating manufacturing operations to Gardnerville, Nevada, in March 1983—partly motivated by concerns over industrial espionage. In February 1983, MSC filed for an initial public offering and rebranded itself as Xebec Corporation following the success of its subsidiary. After going public, Xebec concentrated its efforts on disk drive technologies, reinforcing its strategic focus and market presence in storage solutions.

Expansion and Downturn (1983–1990)

By mid-1983, Xebec had secured major clients including Hewlett-Packard, Philips Data, Texas Instruments, and Victor Technology. That year, the company landed its largest contract: a $200 million agreement with IBM for its 1210 controller IC, utilized in IBM's first personal computer featuring a preinstalled hard drive—the PC XT. Xebec reported revenues of $57 million in 1983, with approximately 25% attributable to the IBM contract. Subsequently, additional clients such as ITT, Mitsubishi, and Toshiba joined its customer base.

The IBM contract initially catalyzed significant growth for Xebec, with employment reaching a peak of 1,200 workers by 1984. However, investors expressed concern over the company’s heavy reliance on IBM, fearing revenue loss if IBM switched suppliers or developed internal capabilities. Indeed, IBM changed suppliers for its PC AT model in 1984, adversely affecting Xebec’s financial results despite ongoing support for the PC XT.

In late 1984, Xebec introduced the Owl series—recognized as the first domestically produced hard drives featuring controller ICs soldered directly onto the circuit board—investing tens of millions into automation at facilities located in Nevada and Pennsylvania. Unlike many competitors who sourced integrated circuits from East Asia, Xebec depended exclusively on U.S.-based suppliers.

October 1984 saw the creation of subsidiary First Class Peripherals, established to market hard disk drive subsystems for Apple II, Macintosh, and IBM PCs via mail order. Initially headquartered in Bethlehem, Pennsylvania, this subsidiary relocated to Carson City, Nevada by 1985 to align with Xebec’s main operations. In 1987, Xebec expanded through subsidiaries such as Epelo for advanced disk controller development and OMNI-Shore for contract manufacturing services.

Despite continued losses in 1985, Xebec consolidated underperforming subsidiaries and shut down its Lehigh Valley manufacturing plant. Financial difficulties intensified in 1987 when IBM discontinued the PC XT line and launched the PS/2 series equipped with proprietary disk controllers. Nevertheless, Xebec continued producing controllers, disk drives, and tape backup products throughout the late 1980s. In early 1988, it divested tape drive patents to spin off Epelo.

Ultimately, Xebec filed for Chapter 7 bankruptcy and ceased operations on July 31, 1989. Following this dissolution, founder Toreson spun off First Class Peripherals into an independent entity—First Class Systems—which manufactured IBM PS/2 clones but ceased operations after one year in 1990.

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