Question

8255 A has three 8 bit ports A, B, C for peripheral data transfer. For programming 8255 A, these ports are grouped as

a.

Port A with Port B

b.

Port A with 4 most significant ports of C, port B with 4 least significant ports of C

c.

Port A with Port C

d.

none of the above

Answer: (b).Port A with 4 most significant ports of C, port B with 4 least significant ports of C

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Q. 8255 A has three 8 bit ports A, B, C for peripheral data transfer. For programming 8255 A, these ports are grouped as

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