The LOCK (active low) is activated automatically by hardware using
A. XCHG signal
B. interrupt acknowledge
C. descriptor table access
D. all of the mentioned
Answer:A
The LOCK (active low) is activated automatically by hardware using
A. XCHG signal B. interrupt acknowledge C. descriptor table access D. all of the mentioned
Explanation: The lock pin is used to prevent the other masters from gaining the control of the bus, for the current and the following bus cycles. This pin is activated by a “LOCK” instruction prefix, or automatically by hardware during XCHG, interrupt acknowledge or descriptor table access.