8085 flags

In 8085 microprocessor, the flags register can have a total of eight flags. Thus a flag can be represented by 1 bit of information. But only five flags are implemented in 8085.
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Flags register in 8085 Microprocessor

• Carry flag (Cy),
• Auxiliary carry flag (AC),
• Sign flag (S),
• Parity flag (P), and.
• Zero flag (Z).

1. Which flag is used in BCD operations of 8085?
2. What are the flags in microprocessor?
3. Which flag is not present in 8085 microprocessor?
4. How many flags are there in microprocessor?
5. What is the use of direction flag in 80386?
6. What is the use of trap flag in 8086?
7. What is flag explain flag in 8085 with diagram?
8. What are flags in microcontroller?
9. What does the zero flag do?
10. How many pins are there in 8085 IC?
11. Which instruction uses flags?
12. What is address bus?
13. What is the use of parity flag?

Which flag is used in BCD operations of 8085?

AC: Auxiliary Carry Flag is set when there is a carry out of lower nibble or lower four bits of the operation. This type of flag is basically used in the BCD (Binary Coded Decimal) number system (0-9).

What are the flags in microprocessor?

The flag register has 5 flags which are Sign flag, Zero flag, Auxiliary carry flag, Parity flag, and the Carry flag.

Which flag is not present in 8085 microprocessor?

Zero flag is present in 8085 but not in the 8051.

How many flags are there in microprocessor?

There are total 9 flags in 8086 and the flag register is divided into two types: (a) Status Flags – There are 6 flag registers in 8086 microprocessor which become set(1) or reset(0) depending upon condition after either 8-bit or 16-bit operation.

What is the use of direction flag in 80386?

The direction flag is a flag that controls the left-to-right or right-to-left direction of string processing, stored in the FLAGS register on all x86-compatible CPUs. It is bit number 10.

What is the use of trap flag in 8086?

Trap Flag (T) in 8086 is used for on-chip debugging. Setting the trap flag puts the microprocessor into a single step mode for debugging. In single stepping, the microprocessor executes an instruction and enters into a single step ISR.

What is flag explain flag in 8085 with diagram?

The Flag register is a Special Purpose Register. Depending upon the value of result after any arithmetic and logical operation the flag bits become set (1) or reset (0). In 8085 microprocessor, flag register consists of 8 bits and only 5 of them are useful.

What are flags in microcontroller?

Flags are a modified kind of register that record the condition of a microprocessor's calculation. For instance, a "zero status" flag is activated only when the microprocessor's calculation concludes with a "zero" status.

What does the zero flag do?

Along with a carry flag, a sign flag and an overflow flag, the zero flag is used to check the result of an arithmetic operation, including bitwise logical instructions. It is set to 1, or true, if an arithmetic result is zero, and reset otherwise.

How many pins are there in 8085 IC?

The 8085 is supplied in a 40-pin DIP package. To maximise the functions on the available pins, the 8085 uses a multiplexed address/data(AD^0-AD^7) bus.

Which instruction uses flags?

Arithmetic and logical instructions set some or all of the flags, and conditional jump instructions take variable action based on the value of certain flags. For example, jz (Jump if Zero), jc (Jump if Carry), and jo (Jump if Overflow) depend on specific flags.

What is address bus?

An address bus is a computer bus architecture used to transfer data between devices that are identified by the hardware address of the physical memory (the physical address), which is stored in the form of binary numbers to enable the data bus to access memory storage.

What is the use of parity flag?

Parity flag indicates whether the lowest order byte of the result an arithmetic or bit wise operation has an even or odd number of 1s. Flag = 1 if parity is even; Flag = 0 if parity is odd.