Question

Which of the following are control flags of 8086 microprocessor?

a) Carry flag

b) Zero flag

c) Trap flag

d) Direction flag

Choose the correct answer:

1. a) and b)
2. c) and d)
3. a) and c)
4. b) and d)

Answer 1

Correct Answer - Option 2 : c) and d)

There are total of 9 flags in 8086 and the flag register is divided into two types:

1. Status Flags:

There are 6 flag registers in the 8086 microprocessor which become set (1) or reset (0) depending upon condition after either 8-bit or 16-bit operation.

Different status flags: Sign (S), zero (Z), auxiliary, parity (AC), carry (CY), Overflow (O)

2. Control Flags:

The control flags enable or disable certain operations of the microprocessor. There are 3 control flags in 8086 microprocessor and these are:

Directional(D), Interrupt (I) and Trap Flag (T)

Hence, option 2 is correct.