What is flag register in 8086 microprocessor?
The flag register is one of the special purpose register. The flag bits are changed to 0 or 1 depending upon the value of result after arithmetic or logical operations. 8086 has 16-bit flag register, and there are 9 valid flag bits. The format of flag register is like below.
What is Flag register explain it?
The FLAGS register is the status register that contains the current state of a CPU. The size and meanings of the flag bits are architecture dependent. It usually reflects the result of arithmetic operations as well as information about restrictions placed on the CPU operation at the current time.
What are the different flags in a register?
Common flags
| Flag | Name |
|---|---|
| Z | Zero flag |
| C | Carry flag |
| S / N | Sign flag Negative flag |
| V / O / W | Overflow flag |
What is flag in microprocessor and it types?
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.
How many flags are there in flag register?
9 flags
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. These flags are conditional/status flags.
What is flag register in 8085 microprocessor?
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 is a register in microprocessor?
Registers are temporary storage locations inside the CPU that hold data and addresses. The register file is the component that contains all the general purpose registers of the microprocessor. A few CPUs also place special registers such as the PC and the status register in the register file.
How flag register of 8086 is different from 8085 which flags are present in 8086 but not in 8085 explain their working?
Whereas 8086 comparatively holds a very large number of processors in it. 8085 supports a single mode of operation, while 8086 supports two operating modes, minimum and maximum mode. There exist total 5 flags (i.e., sign, zero, auxiliary carry, parity and carry flag) in 8085 microprocessor.
How many flag registers are there in 8086?
6 flag registers
(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. These flags are conditional/status flags.
What is flag register Quora?
In Intel 8085 Microprocessor, The Flag register is a part of the Program/Processor Status Word. The PSW contains 8 bits out of which 5 flag bits (flip flops store the information of the execution in Accumulator) represent the status of execution of the Microprocessor.