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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 EMMU ： ウィキペディア英語版 EMMU EMMU is a custom MMU chip for the 130XE Atari 8-bit computer. It is used to access the extra 64kB of RAM present in the 130XE. The user cannot directly manipulate the EMMU, but selects the various ROMS and memory banks via the memory-mapped hardware register known as PORTB (5401710 or D30116). Atari changed PORTB from an input port on the 400/800 machines to an output port on the XL/XE machines, leaving two joystick ports instead of four on the XL/XE machines. By setting and clearing specific bits in PORTB, the user can access the extra 64kB of memory in 16kB increments. No synchronization is required as the OS handles the access. The bit assignments for PORTB are as follows: ==See also== * Atari FREDDIE * Atari MMU 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「EMMU」の詳細全文を読む 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.