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The term Legacy Plug and Play,〔(Final Legacy Plug and Play Paper )〕 also shortened to PnP,〔(【引用サイトリンク】title=The PC Guide - Plug and Play (Legacy) )〕 describes a series of specifications and Microsoft Windows features geared towards operating system configuration of devices. The standards were primarily aimed at the IBM PC standard bus, later dubbed ISA. Related specifications are also defined for the common external or specialist busses commonly attached via ISA at the time of development, including RS-232 and parallel port devices. As a Windows feature, Plug and Play refers to operating system functionality that supports connectivity, configuration and management with native plug and play devices. Originally considered part of the same feature set as the specifications, Plug and Play in this context refers primarily to the responsibilities and interfaces associated with Windows driver development. Plug and Play allows for detection of devices without user intervention, and occasionally for minor configuration of device resources, such as I/O ports and device memory maps. PnP is a specific set of standards, not be confused with the generic term plug and play, which describes any hardware specification that alleviates the need for user configuration of device resources.〔(【引用サイトリンク】title=The PC Guide - Plug and Play )〕 == Overview == The Plug and Play standard requires configuration of devices to be handled by system firmware, which then provides details of resources allocations to the operating system. The process is invoked at boot time. When the computer is first turned on, compatible devices are identified and assigned non-conflicting addresses and interrupt request numbers. The term Plug and Play was first used by Microsoft in reference to their Windows 95 product. Other operating systems, such as AmigaOS Autoconfig and the Mac OS NuBus system, had already supported such features for some time (under various names, or no name〔(【引用サイトリンク】title=DNA/Dongly Things )〕), but the term ''plug and play'' gradually became universal Typically, non-PnP devices need to be identified in the computer's BIOS setup so that the PnP system will not reassign those devices. Problems in the interactions between legacy non-PnP devices and the PnP system can cause it to fail, leading to this technology having historically been referred to as "plug and pray".〔 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「Legacy Plug and Play」の詳細全文を読む スポンサード リンク
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