The instructions that are used for reading an input port and writing an output port respectively are
A. MOV, XCHG
B. MOV, IN
C. IN, MOV
D. IN, OUT
Answer:A
The instructions that are used for reading an input port and writing an output port respectively are
A. MOV, XCHG B. MOV, IN C. IN, MOV D. IN, OUT
Explanation: The address of the input/output port may be specified directly or indirectly.