Table of Contents
Which registers are 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 the 8 general purpose registers?
General purpose registers are used to store temporary data within the microprocessor. There are 8 general purpose registers in 8086 microprocessor. 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 is the difference between general purpose and special purpose registers?
General purpose – These do not have side effects, can be used by most instructions. One can do arithmetic with them, use them for memory addresses, and so on. Special purpose – Registers which do not have side effects, but can only be used for certain purposes and only by certain instructions.
What are general purpose register in 8085?
The 8085 has six general – purpose registers to store 8-bit data; these are identified as B, C, D, E, H and L as shown in the figure. They can be combined as register pairs – BC, DE, and HL – to perform some 16-bit operations.
What is General register Organization?
General Register organization. Generally CPU has seven general registers. Register organization show how registers are selected and how data flow between register and ALU. A decoder is used to select a particular register. The output of each register is connected to two multiplexers to form the two buses A and B.
What do general purpose registers provide for the CPU?
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 difference between segment register and general purpose register?
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.
What are the names of the general purpose registers in an Intel x86 CPU?
The main registers were called AX, BX,CX, DX, a natural eXtension of the 8080’s A through D, each of these could also be referenced as two 8-bit registers which were called AL, AH, BL, BH, etc. The 8086 index register, also 16-bit, were called SI, DI, BP and SP after their primary functions.
Which is special purpose register?
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. The diagram above shows that the CPU contains a number of registers in order to process data and to follow program instructions.
What is general register in school?
School General Register (G.R.) which is a mandatory register maintained at institutional level recording all the relevant data of each and every student enrolled with it. It is one of the important registers. It consists of records of all the students admitted to the school from the inception.
What is the function of general purpose register?
As the name suggests, each special purpose register is designated for a purpose and that purpose alone. 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.
How many general purpose and special purpose register in 8086?
8086 execution units consists of four general purpose and four special function registers as shown in figure below: The programmers use general-purpose registers for performing arithmetic computations, logical operations, data storage & pointers to memory.
What is the purpose of the general purpose registers, segment?
The general purpose registers are used to store temporary data in the time of different operations in microprocessor . 8086 has eight general purpose registers. This is the accumulator. It is 16-bit registers, but it is divided into two 8-bit registers.
What are special purpose registers?
A Special Function Register (or Special Purpose Register, or simply Special Register) is a register within a microprocessor, which controls or monitors various aspects of the microprocessor’s function.