What is status register in microprocessor?
Table of Contents
- 1 What is status register in microprocessor?
- 2 What are the registers in 8086 microprocessor?
- 3 Which register contains 8086 8088 flag?
- 4 Where is status register located?
- 5 What is the use of Flag register in microprocessor?
- 6 How Flag register of 8086 is different from 8085 which flags are present in 8086 but not in 8085 explain their working?
- 7 What is the function of the status register in a processor?
- 8 How many flag bits are there in 8086?
What is status register in microprocessor?
The status register is a hardware register that contains information about the state of the processor. Individual bits are implicitly or explicitly read and/or written by the machine code instructions executing on the processor.
What are the registers in 8086 microprocessor?
The 8086 has eight more or less general 16-bit registers (including the stack pointer but excluding the instruction pointer, flag register and segment registers). Four of them, AX, BX, CX, DX, can also be accessed as twice as many 8-bit registers (see figure) while the other four, SI, DI, BP, SP, are 16-bit only.
What are status flags in 8086 microprocessor?
8086 has 16-bit flag register, and there are 9 valid flag bits….Status Flags.
| Flag Bit | Function |
|---|---|
| P | This is even parity flag. When result has even number of 1, it will be set to 1, otherwise 0 for odd number of 1s |
| CY | This is carry bit. If some operations are generating carry after the operation this flag is set to 1 |
How many status flags are there in 8086 flag register?
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.
Which register contains 8086 8088 flag?
Discussion Forum
| Que. | Which register containing the 8086/8088 flag? |
|---|---|
| b. | Stack register |
| c. | Flag register |
| d. | Stand register |
| Answer:Status register |
Where is status register located?
The status register is an 8-bit register in the microcontroller’s I/O memory space. It contains 8 flags that are updated based on the results of the previous instruction.
What is Flag register explain it?
The FLAGS register is the status register that contains the current state of a CPU. The carry, parity, adjust, zero and sign flags are included in many architectures. The adjust flag used to be called auxiliary carry bit in 8080 and half-carry bit in the Zilog Z80 architecture.
What is the use of flag register in 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 the use of Flag register in microprocessor?
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.
How Flag register of 8086 is different from 8085 which flags are present in 8086 but not in 8085 explain their working?
Both 8085 and 8086 are two major microprocessors designed by Intel….Comparison Chart.
| Basis for Comparison | 8085 | 8086 |
|---|---|---|
| Number of flags present | 5 | 9 |
| Number of transistors | Less (around 6500) | More (around 29000) |
| Operating mode | Only one | Two (minimum and maximum mode) |
| Pipelining | Unsupportable | Supportable |
What is flag register of 8086 microprocessor?
Flag register of 8086 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). (a) Status Flags – There are 6 flag registers in 8086 microprocessor which become set (1) or reset
What is the use of accumulator in 8086 microprocessor?
It is generally used for arithmetical and logical instructions but in 8086 microprocessor it is not mandatory to have accumulator as the destination operand. BX – This is the base register.
What is the function of the status register in a processor?
It stores the offset address of the Destination. The Flag or Status register is a 16-bit register which contains 9 flags, and the remaining 7 bits are idle in this register. These flags tell about the status of the processor after any arithmetic or logical operation.
How many flag bits are there in 8086?
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. We can divide the flag bits into two sections. The Status Flags, and the Control Flags.