Consider how a terminal works. The driver outputs one character and then blocks. When the character has
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Consider how a terminal works. The driver outputs one character and then blocks. When the character has been printed, an interrupt occurs and a message is sent to the blocked driver, which outputs the next character and then blocks again. If the time to pass a message, output a character, and block is 4 msec, does this method work well on 110-baud lines? How about 4800-baud lines?
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Operating Systems Design And Implementation
ISBN: 9780131429383
3rd Edition
Authors: Andrew Tanenbaum, Albert Woodhull
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