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In computing, in the Alpha instruction set architecture, PALcode (Privileged Architecture Library code) is the name used by DEC for a set of functions in the SRM or AlphaBIOS firmware, providing a hardware abstraction layer for system software, covering features such as cache management, translation lookaside buffer (TLB) miss handling, interrupt handling and exception handling. PALcode is Alpha machine code, running in a special mode that also allows access to internal registers specific to the particular Alpha processor implementation. It is thus somewhere between the role of microcode and of a hardware emulator. PALcode is operating system-specific; different versions of PALcode are required by OpenVMS, Tru64 UNIX, and Windows NT. Tru64 UNIX PALcode is also used by NetBSD, FreeBSD, OpenBSD and Linux. == References == * (OpenVMS FAQ ) (Hewlett-Packard) * * (【引用サイトリンク】title=Some simple PAL code ) 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「PALcode」の詳細全文を読む スポンサード リンク
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