The data-in register of I/O port is
A. read by host to get input
B. read by controller to get input
C. written by host to send output
D. written by host to start a command
Answer:A
The data-in register of I/O port is
A. read by host to get input B. read by controller to get input C. written by host to send output D. written by host to start a command
Explanation:None.