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Microprocessor Fundamentals - Technical MCQs

Q1:

Single-bit indicators that may be set or cleared to show the results of logical or arithmetic operations are the:

A flags

B registers

C monitors

D decisions

ANS:A - flags

This is the flip flop that can be set (1) or reset (2).

There are five flip flops in 8085:

1. Zero flag: set when the result or the content in an accumulation is 0.
2. Sign flag: set when the result is negative.
3. Auxiliary carry flag: set when D3 generates a carry for D4.
4. Parity flag: set to true when parity is even.
5. Carry flag: set when result generates carry.