Question

Explain the functions of following pins of 8085 Micro Processor: 
 IO/M

Answer 1

(1) It is a status signal indicates whether the address bus is for I/O device or for memory.
(2) When it goes high, the address on the address bus referring I/O device and when it goes low, the address on the address bus referring memory.
(3) It is tristated during HOLD and HALT.