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Question
Explain the given function of pins on Intel 8085
IO/`barM`
Solution
It is a status signal indicates whether the address bus is for I/O device or for memory.
When it goes high, the address on the address bus refers I/O device and when it goes low, the address on the address bus refers memory.
It is tristated during HOLD and HALT
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Introduction to Microprocessors and Organization of 8085
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