Why MOVX instruction is being used to access the ports of the 8255?
A. because 8255 is used to access the memory mapped I/O
B. because 8255 is used to access the external communication
C. because 8255 is used to access the data transfer
D. because 8255 is used to access the interfacing of LCD, motor etc.
Answer:A
Why MOVX instruction is being used to access the ports of the 8255?
A. because 8255 is used to access the memory mapped I/O B. because 8255 is used to access the external communication C. because 8255 is used to access the data transfer D. because 8255 is used to access the interfacing of LCD, motor etc.
Explanation: MOVX instruction is used to access the external memory, so it is used to access the memory mapped I/O.