Electronics and Communication Engineering - Microprocessors - Discussion
Discussion Forum : Microprocessors - Section 5 (Q.No. 38)
38.
Consider the following statements
- A total of about 1 million bytes can be directly accessed by 8086 microprocessor.
- The 8086 has thirteen 16 bit registers.
- The 8086 has eight flags.
- Compared to 8086, the 80286 provides a higher degree of memory protection.
Discussion:
4 comments Page 1 of 1.
Saravanan said:
10 years ago
8086 has 9 flags.
Deep said:
9 years ago
8086 has 16 flags.
Jadav said:
9 years ago
Flag Register:-
It is a 16-bit register with each bit corresponding to a flip-flop. It changes its status according to the stored output in the accumulator. A flag can control certain operation of the EU.
Active flag:- There are nine active flags out of 16, in the 8086 flag register. The remaining are undefined flag.
Control Flag:- Out of nine active flags, six are conditional flags and the remaining three are called as the control flag. The three control flags are:
1. The Trap flag(TF).
2. The interrupt flag(IF).
3. The direction flag(DF).
It is a 16-bit register with each bit corresponding to a flip-flop. It changes its status according to the stored output in the accumulator. A flag can control certain operation of the EU.
Active flag:- There are nine active flags out of 16, in the 8086 flag register. The remaining are undefined flag.
Control Flag:- Out of nine active flags, six are conditional flags and the remaining three are called as the control flag. The three control flags are:
1. The Trap flag(TF).
2. The interrupt flag(IF).
3. The direction flag(DF).
Mani said:
6 years ago
It is 16 flags.
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