Sage-Tips

What is the difference between special purpose and general purpose registers?

We have discussed general purpose registers as being discrete memory locations within the CPU used to hold temporary data and instructions. A special purpose register is one that has a specific control or data handling task to carry out. There are a number of special purpose registers within the CPU.

What is a general purpose register?

General-purpose registers (GPRs) can store both data and addresses, i.e., they are combined data/address registers; in some architectures, the register file is unified so that the GPRs can store floating-point numbers as well.

What is the basic difference in between segment register and general purpose registers?

Segments are specific areas clear in a program for containing data, code and stack. There are 3 main segments − Code Segment − It contains all the instructions to be executed. A 16-bit Code Segment register or CS register supplies the starting address of the code segment.

Which register is a special purpose register?

Special Purpose Registers. (a) Register A(Accumulator) – Register A is an 8-bit register used in 8085 to perform arithmetic, logical, I/O & LOAD/STORE operations. Register A is quite often called as an Accumulator.

What are the special purposes registers in 8085?

In addition to the above general-purpose registers, the 8085 microprocessor has special-purpose registers, namely, Program Counter (PC), Stack Pointer (SP), Flags/Status Registers (SR), Instruction Register (IR), Memory Address Register (MAR), Temporary Register (TR), and Memory Buffer Register (MBR).

Which is type of general purpose register?

The general purpose registers are divided into two categories. Four registers, AX, BX, CX, and DX, are classified as data registers.

What are special purpose register in 8085?

What is general purpose register in microcontroller?

The general purpose registers are used to store temporary data in the time of different operations in microprocessor.

What is the purpose of general purpose register BX?

BX – This is the base register. It is of 16 bits and is divided into two 8-bit registers BH and BL to also perform 8-bit instructions. It is used to store the value of the offset.

What are different special purpose registers?

Special purpose registers ( SPR ) hold program state; they usually include the program counter (aka instruction pointer), stack pointer, and status register (aka processor status word).

What are general purpose registers in 8086?

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. AX – accumulator, and preferred for most operations.

What are the general purpose registers used for?

General purpose registers, on the other hand serve as scratchpad for software. They are used for passing parameters to functions, storing return values, and intermediate values during computations. Click to see full answer. Consequently, what are the special purpose registers?

What is the use of a special register?

A special register is the most valuable register that is use for store the large scale data in the memory at a time. So we can easily manage the data as per requirement.

What is the difference between general purpose computer and speical computer?

A general purpose computer is used for different programs for different functions. A speical-purpose computer is designed for special functions only. It is usually made to do one thing only. Also, what is a multi purpose computer?

What are the general purpose registers in an ARM processor?

Kevin Tian’s answer is great for x86 processors, so this one will focus on ARM processors. There are several special purpose, and general purpose registers in the ARM architecture. Generally speaking, R0 – R12 are the general purpose registers that are used for logical, and arithmetic operations.