The number of address lines used by the I/O processor in 8089 is
A. 20
B. 12
C. 16
D. 8
Answer:A
The number of address lines used by the I/O processor in 8089 is
A. 20 B. 12 C. 16 D. 8
Explanation: The 8089 I/O processor uses only 16 address lines, and thus it can address only 64KB of IO space.