What is meant by flag register?
The FLAGS register is the status register in Intel x86 microprocessors that contains the current state of the processor. This register is 16 bits wide. Its successors, the EFLAGS and RFLAGS registers, are 32 bits and 64 bits wide, respectively.
What is the purpose of flag register?
The purposes of the FLAG registers are to indicate the various statuses of the processor. It is done by setting the individual bits called flags. There are two kinds of FLAGS; Status FLAG and Control FLAG. Status FLAG reflect the result of an operation executed by the processor.
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 |
How flag register of 8086 is different from 8085 which flags are present in 8086 but not in 8085 explain their working?
The memory addressing capacity of 8085 is 216 i.e., 64 KB. There exist total 5 flags (i.e., sign, zero, auxiliary carry, parity and carry flag) in 8085 microprocessor. As against overall 9 flags (i.e., overflow, direction, interrupt, trap and rest other of 8085) are present in 8086 microprocessor.
Is 8085 and 8086 the same?
The 8085 is an 8-bit microprocessor. It was produced by Intel and first introduced in 1976. The 8086 is enhanced version of 8085 microprocessor. It is 16-bit processor….Differences between 8085 and 8086 microprocessor.
| Property | 8085 Microprocessor | 8086 Microprocessor |
|---|---|---|
| Processor type | Accumulator based | General Purpose register based |
What is segmented memory 8086?
A segment is a logical unit of memory that may be up to 64 kilobytes long. Each segment is made up of contiguous memory locations. However, it works only with four 64KB segments within the whole 1MB memory. Below is the one way of positioning four 64 kilobyte segments within the 1M byte memory space of an 8086.
How many versions of 8086 are there?
List of Intel 8086
| Model number | Frequency | Technology |
|---|---|---|
| 8086 | 5 MHz | HMOS |
| 8086-1 | 10 MHz | HMOS II |
| 8086-2 | 8 MHz | HMOS II |
| 8086-4 | 4 MHz | HMOS |
How many registers are there in 8086?
The 8086 in total consists of 14 16 bit registers. Extra Segment. 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 the classifications of 8086 registers?
The registers inside the 8086 are all 16 bits. They are split up into four categories: General Purpose, Index, Status & Control, and Segment. The four general purpose registers are the AX, BX, CX, and DX registers.
What is a register in English?
1. countable noun. A register is an official list or record of people or things. registers of births, deaths and marriages.