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UNOS was the first 32bit Unix-like real-time operating system with real-time extensions. It was developed by Jeffery Goldberg, PhD. who left Bell Labs after using UNIX and became VP of engineering for (now defunct) Charles River Data Systems (CRDS). UNOS was written to capitalize on the first 32 bit microprocessor, the Motorola 68k CPUs. CRDS sold a UNOS based 68K system, and sold porting services and licenses to other manufacturers who had embedded cpu's. ==History== Jeff Goldberg created an experimental OS using only eventcounts for synchronization, that allowed a preemptive kernel, for a Charles River Data Systems (CRDS) PDP-11. CRDS hired Goldberg to create UNOS and began selling it in 1981.〔(【引用サイトリンク】title=Multics Significance )〕 UNOS was written for the Motorola 68000 processor family. While compatible with Version 7 Unix, it is also a real-time operating system. CRDS supported it on the company's Universe 68 computers, as did Motorola's Versabus systems. CRDS's primary market was OEMs embedding the CRDS unit within a larger pile of hardware, often requiring better real-time response than Unix could deliver. UNOS has a cleaner kernel interface than UNIX in 1981. There was e.g. a system call to obtain ps information instead of reading /dev/kmen. UNOS required memory protection, with the 68000 using an MMU developed by CRDS; and only used Motorola MMUs after UNOS 7 on the 68020 (CRDS System CP20) (using the PMMU (MC68851 PMMU)). UNOS was written in C and assembly language, and supported Fortran, COBOL, Pascal and Business Basic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「UNOS (operating system)」の詳細全文を読む スポンサード リンク
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