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The Integrated Woz Machine (or IWM for short) is a single-chip version of the floppy drive controller for the Apple II. It was also employed in Macintosh computers. == History == When developing a floppy drive for the Apple II, Apple Inc. co-founder Steve Wozniak felt that the existing ones available on the market were too complicated, expensive and inefficient. Rather than adopting the existing floppy drives from Alan Shugart, Wozniak decided to keep only the drive mechanics and to develop his own electronics for both the drive as well as the controller. Wozniak successfully came up with a working floppy drive with much fewer electronic components. Instead of storing 8–10 sectors (each holding 256 bytes of data) per track on a 5.25-inch floppy disk — something standard at that time, Wozniak managed to squeeze as many as 13 sectors on each track using the same mechanics and the same storage medium. In a later revision, this number was bumped up to 16 sectors per track. At first, the floppy drive controller was built with many ICs and a PROM. To cope with increasing orders, Wendell Sander at Apple later put all these components into one single chip and developed a single-chip version — the IWM.〔http://www.folklore.org/StoryView.py?story=Five_Different_Macs.txt〕 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「Integrated Woz Machine」の詳細全文を読む スポンサード リンク
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