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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 6502 ： FOLDOC 6502 An eight-bit microprocessor designed by MOS Technologies around 1975 and made by {Rockwell}. Unlike the Intel 8080 and its kind, the 6502 had very few registers. It was an 8-bit processor, with 16-bit address bus. Inside was one 8-bit data register (accumulator), two 8-bit index registers and an 8-bit stack pointer (stack was preset from address 256 to 511). It used these index and stack registers effectively, with more addressing modes, including a fast zero-page mode that accessed memory locations from address 0 to 255 with an 8-bit address (it didn't have to fetch a second byte for the address). Back when the 6502 was introduced, RAM was actually faster than CPUs, so it made sense to optimise for RAM access rather than increase the number of registers on a chip. The 6502 was used in the BBC Microcomputer, Apple II, Commodore, Apple Computer and Atari personal computers. Steve Woznia s. Steve Woznia 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.