Description: Design task and requirements of 1. 8 8255 then switch K1 ~ K8, do flower keystrokes. 2. To control the speaker 8253, the use of simple keyboard, issued by the corresponding scale. Requirements: K1-mute K2-fa si audio 493HzK3-fa la s sound of 440HzK4-fa sol fa fa sound 392HzK5-audio 349HzK6-fa mi fa 329HzK7-sound re audio 293HzK8-fat, do the 261Hz tone
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