Xylogics started out building disk and other controllers for DEC

Digital Equipment Corporation

Digital Equipment Corporation was a major American company in the computer industry and a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s...

 hardware.

They also built serial terminal server

Terminal server

A terminal server enables organizations to connect devices with an RS-232, RS-422 or RS-485 serial interface to a local area network . Products marketed as terminal servers can be very simple devices that do not offer any security functionality, such as data encryption and user authentication...

s from 4-port to 72-port units.

Xylogics was acquired by Bay Networks

Bay Networks

Bay Networks was a network hardware vendor formed through the merger of Santa Clara, California based SynOptics Communications and Billerica, Massachusetts based Wellfleet Communications on July 6, 1994...

 in December 1995 which in turn was acquired by Nortel

Nortel

Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel, was a multinational telecommunications equipment manufacturer headquartered in Mississauga, Ontario, Canada...

 in June 1998.
Xylogics was located in Burlington, MA.

The Multibus

Multibus

Multibus is a computer bus standard used in industrial systems. It was developed by Intel Corporation and was adopted as the IEEE 796 bus.The Multibus specification was important because it was a robust, well-thought out industry standard with a relatively large form factor so complex devices could...

 based Xylogics 450 SMD

Storage Module Device

Storage Module Device was a family of storage devices first shipped by Control Data Corporation in December 1973 as the CDC 9760 40 MB storage module disk drive. The CDC 9762 80 MB variant was announced in June 1974 and the CDC 9764 150 MB and the CDC 9766 300 MB variants were announced in 1975...

 and Xylogics 451 ESMD disk controllers along with Interphase Multibus SMD disk controllers were significant to the workstation

Workstation

A workstation is a high-end microcomputer designed for technical or scientific applications. Intended primarily to be used by one person at a time, they are commonly connected to a local area network and run multi-user operating systems...

 and minicomputer

Minicomputer

A minicomputer is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems and the smallest single-user systems...

 industry during the 1980s as a low cost interface the low cost, high performance, high capacity SMD and ESMD disk drives available at the time. Sun 1, Sun 2 and Sun 3 servers and Silicon Graphics

Silicon Graphics

Silicon Graphics, Inc. was a manufacturer of high-performance computing solutions, including computer hardware and software, founded in 1981 by Jim Clark...

 IRIS , HP/Apollo

Apollo/Domain

Apollo/Domain was a range of workstations developed and produced by Apollo Computer from circa 1980 to 1989. The machines were built around the Motorola 68k family of processors, except for the DN10000, which had from one to four of Apollo's RISC processors, named PRISM.-Operating system:The...

all used Xylogics 450 and 451 disk controllers.