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8255 PPI Study Card


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8255 PPI Study Card

8255 PPI Study Card

This study card for 8255 is designed to explain all the features of 8255 peripherals. Additionally, the board also features

  • Four 8-way dip switches to configure the 8255 Port lines in different modes of operation.
  • 8 RED, 8 GREEN, and 5 YELLOW LEDs are provided to read the status of port A, port B and port C lines respectively.
  • Switches S1, S2 & S3 are provided to stimulate STB* or ACK* signals in Mode 1 and Mode 2.

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