TigerSwitch: a case study in embedded computing system design

Authors:
Wayne Wolf;Andrew Wolfe;Steve Chinatti;Ravi Koshy;Gary Slater;Spencer Sun
Affiliations:
Princeton University;Princeton University;Princeton University;Princeton University;Princeton University;Princeton University
Venue:
CODES '94 Proceedings of the 3rd international workshop on Hardware/software co-design
Year:
1994

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Abstract

This paper describes and analyzes the design of TigerSwitch, a PC-based private branch exchange (PBX) designed at Princeton University. Building TigerSwitch required creating custom hardware and software designed to fit onto a standard IBM PC-compatible platform. Our design experience provides several lessons which we believe extend to other embedded design domains: the system architecture required to meet performance goals is often not isomorphic to the structure of the specification; system-level performance analysis is an essential part of system architecture design; architectural decisions must be made on the basis of estimates before complete implementations of the components are available; and most allocations of functions to software or custom hardware are obvious, while a few are very difficult.