•LOCK#
•This is output signal.
•When it is low, other system bus master will be prevented from gaining the system bus.
•It is activated by the LOCK prefix instruction and remains active until the completion of the next instruction.
•It is used when the CPU is executing a critical (imp) instruction.
•QS1, QS0 – Queue Status:
•These lines give information about the status of the instruction queue.
•These pins are used by the other local bus master in maximum mode, to force the processor to release the local bus at the end of the processor current bus cycle.
•These are bidirectional signals.
•RQ/GT0 has higher priority than RQ/GT1
•The request and grant pulses are active low.
•After receiving the request on this lines, 8086 acknowledge signal on the same lines.
