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