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Xinu
Xinu ("Xinu Is Not Unix", a recursive acronym) is an operating system for embedded systems, originally developed by Douglas Comer for instructional purposes at Purdue University in the 1980s. The name is both recursive, and is "Unix" spelled backwards. It has been ported to many hardware platforms, including the DEC PDP-11 and VAX systems, Sun-2 and Sun-3 workstations, Intel x86, PowerPC G3 and MIPS. Xinu was also used for some models of Lexmark printers.
Despite its name suggesting some similarity to Unix, Xinu is truly a different operating system, written without knowledge of the Unix source code and without the goal of compatibility; it uses different abstractions, different system calls and in fact has some system calls with names matching those of Unix, but different semantics.
==History==
The Xinu operating system first ran on the LSI-11 platform. A VAX port was developed in 1986 by Comer and Tom Stonecypher, followed by an IBM PC compatible port in 1988 by Comer and Timothy Fossum, and a 486 version by John Lin in 1995. The Macintosh platform port of Xinu was developed in 1989 by Comer and
Steven Munson. The Motorola 68000 (Sun 3) port of Xinu was developed by Shawn Ostermann, circa 1988. The Sparc port of Xinu was developed by Jim Griffioen. The PowerPC port of Xinu was developed in 2005 by Dennis Brylow. The MIPS implementation of Embedded Xinu was developed in 2006 by Dennis Brylow.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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