The following signals are for minimum mode operation of 8086.
- Memory/ I/O signal selects either memory operation or I/O operation. This line indicates that the microprocessor address bus contains either a memory address or an I/O port address. Signal high at this pin indicates a memory operation. This line is logically equivalent to 
in maximum mode.
- - Interrupt acknowledge: The interrupt acknowledge signal is a response to the INTR input signal. The signal is normally used to gate the interrupt vector number onto the data bus in response to an interrupt request.
ALE - Address Latch Enable: This output signal indicates the availability of valid address on the address/data bus, and is connected to latch enable input of latches.
- : Data transmit/Receive: This output signal is used to decide the direction of date flow through the bi-directional buffer. 
indicates transmitting and 
indicates receiving the data.