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electronics and communication engineering microprocessors
1. 8255 A has three 8 bit ports A, B, C for peripheral data transfer. For programming 8255 A, these ports are grouped as
(A): none of the above
(B): Port A with 4 most significant ports of C, port B with 4 least significant ports of C
(C): Port A with Port B
(D): Port A with Port C
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