| Instruction Description | ADC Adds specified operands and the carry status (i.e. carry of the previous stage). | SUB Subtract immediate data from accumulator, memory or register. | SBB Subtract immediate data with borrow from accumulator, memory or register. | MUL Unsigned 8-bit or 16-bit multiplication. |
|---|
What is instruction set in microprocessor?
An instruction set is
a group of commands for a CPU in machine language
. The term can refer to all possible instructions for a CPU or a subset of instructions to enhance its performance in certain situations.
How many instruction set are there in 8086?
Ans. There are
117 basic
instructions in the instruction set of 8086.
What is instruction set and its types?
The instruction set
provides commands to the processor
, to tell it what it needs to do. The instruction set consists of addressing modes, instructions, native data types, registers, memory architecture, interrupt, and exception handling, and external I/O.
What is instruction set in 8085 microprocessor?
Intel 8085 Instructions
An instruction of a computer is a command given to the computer to perform a specified operation on given data. In microprocessor, the instruction set is
the collection of the instructions that the microprocessor is designed to execute
.
What is set of instructions called?
A set of instructions that directs a computer’s hardware to perform a task is called a program, or software program. …
How is the instruction set classified?
These instructions can be classified into the following five functional categories:
data transfer (copy) operations, arithmetic operations, logical operations, branching operations, and machine-control operations
.
How many instructions are supported by 8086 microprocessor explain?
It is of 16 bits and is divided into two 8-bit registers AH and AL to also perform
8-bit instructions
. It is generally used for arithmetical and logical instructions but in 8086 microprocessor it is not mandatory to have accumulator as the destination operand.
What are the different types of addressing modes of 8086 instruction set?
- Immediate addressing mode. …
- Register addressing mode. …
- Direct addressing mode. …
- Register indirect addressing mode. …
- Based addressing mode. …
- Indexed addressing mode. …
- Based-index addressing mode. …
- Based indexed with displacement mode.
What is instruction set format?
In computer architecture , the instruction format is defined as
standard machine instruction format that can be directly decoded and executed by
the central processing unit ( CPU ). … The instruction formats supported by the CPU depends upon the instruction set architecture ( ISA ) implemented by the processor.
How many instructions are there in 8085 instruction set?
– The 8085 uses a total of 246 bit patterns to form its instruction set. – These 246 patterns represent only
74 instructions
.
What is instruction set of Intel 8085 write their classification?
| Opcode Operand Meaning | SBI 8-bit data Subtract the immediate from the Accumulator with borrow | INR R M Increment the register or the memory by 1 | INX R Increment register pair by 1 | DCR R M Decrement the register or the memory by 1 |
|---|
Where is instruction set stored?
You can see it as , instruction set is stored in
the control unit
. control unit is a hardware logic circuit which indeed is a silicon chip ( semiconductor device ), designed in such a way that it responds to certain inputs (memory instructions ) to produce meaningful control signals for the other CPU components .
What is the mean of instruction?
Definition of instruction
1a
instructions
plural : an outline or manual of technical procedure : directions. b : a direction calling for compliance : order —usually used in plural had instructions not to admit strangers. c : a code that tells a computer to perform a particular operation.
What is a set of programs?
A set of program is called
software
.
How many types of instruction sets are there?
Following are the instruction set architectures:
Reduced Instruction Set Computer
(RISC) Complex Instruction Set Computer (CISC) Minimal instruction set computers (MISC)
Is a set of instructions in a sequence?
A program
is a sequence of instructions stored in main memory. When a program is run, the CPU fetches the instructions and executes or follows the instructions.
What is 3 byte instruction in microprocessor?
Three-byte instruction is the
type of instruction in which the first 8 bits indicates the opcode and the next two bytes specify the 16-bit address
. The low-order address is represented in second byte and the high-order address is represented in the third byte.
What are 5 types of instruction operations?
- Data handling and memory operations.
- Arithmetic and logic operations.
- Control flow operations.
- Coprocessor instructions.
- Number of operands.
What are the different types of instruction set of 8051?
- Data Transfer Instructions.
- Arithmetic Instructions.
- Logical Instructions.
- Boolean or Bit Manipulation Instructions.
- Program Branching Instructions.
What is ADD instruction?
add — Integer Addition. The add instruction
adds together its two operands, storing the result in its first operand
. Note, whereas both operands may be registers, at most one operand may be a memory location. Syntax.
What is 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.
What is a microprocessor 8086?
8086 Microprocessor is
an enhanced version of 8085Microprocessor
that was designed by Intel in 1976. It is a 16-bit Microprocessor having 20 address lines and16 data lines that provides up to 1MB storage. It consists of powerful instruction set, which provides operations like multiplication and division easily.
What type of architecture is used in 8086 microprocessor?
Pipelining − 8085 doesn’t support a
pipelined architecture
while 8086 supports a pipelined architecture.
What is an instruction set and how is it involved in the process of program execution?
Generally, instruction
is used to perform a single task
. The set of instructions used to perform specific operations is called the instruction set. Each instruction has two parts: opcode and operand.
What is instruction format types?
Instruction is of
variable length
depending upon the number of addresses it contains. Generally, CPU organization is of three types based on the number of address fields: Single Accumulator organization. General register organization. Stack organization.
How many instructions are in a microprocessor?
| Description No. of opcodes No. of instruction types | Branch Instructions 36 8 | I/O Instructions 2 2 | Interrupt Instructions 5 5 | Total 246 66 |
|---|
What is instruction code?
An instruction code is
a group of bits that instruct the computer to perform a specific operation
. • The operation code of an instruction is a group of bits that define operations such as addition, subtraction, shift, complement, etc.
What are the five types of instruction set in 8085 microprocessor?
- Data Transfer Group.
- Arithmetic Group.
- Logical Group.
- Branch Control Group.
- I/O and Machine Control Group.
