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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Microcode ： FOLDOC microcode A technique for implementing the instruction set of a processor as a sequence of microcode instructions ("microinstructions"), each of which typically consists of a (large) number of bit fields and the address of the next microinstruction to execute. Each bit field controls some specific part of the processor's operation, such as a gate which allows some functional unit to drive a value onto the bus or the operation to be performed by the ALU. Several microinstructions will usually be required to fetch, decode and execute each machine code instruction ("{macroinstruction}"). The microcode may also be responsible for polling for hardware interrupts between each macroinstruction. Writing microcode is known as "microprogramming". Microcode may be classified as "horizontally encoded" or "vertically encoded". Horizontal microcode is as described above where there is a fairly direct correspondence between the bit fields in a microinstruction an スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.