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Input data from the parallel port: The peripheral detects whether the STB is busy

  • 2014-03-05
  • 1.01KB
  • Points it Requires : 2

Input data from the parallel port: The peripheral detects whether STB is busy, if so, wait. Send data, set ACK, detect whether AFD responds, if yes, clear ACK, otherwise wait. PC detects whether ACK is strobed, if yes, set STB, otherwise wait. Read data, and send AFD clear busy after processing.

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