What are 1 byte 2-byte and 3-byte instruction?
Table of Contents
- 1 What are 1 byte 2-byte and 3-byte instruction?
- 2 What do you mean by instruction format describe one byte 2-byte and 3-byte instructions of 8085?
- 3 Which is 3 byte instruction of 8085?
- 4 What is 8085 instruction set?
- 5 What are instructions in microprocessor?
- 6 What is an instruction set in 8085?
- 7 What is the instruction set of 8085 microprocessor?
- 8 How many instructions are there in a microprocessor?
What are 1 byte 2-byte and 3-byte instruction?
In a two-byte instruction, the first byte will be the opcode and the second byte will be for the numeral present in the instruction. 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.
What do you mean by instruction format describe one byte 2-byte and 3-byte instructions of 8085?
The 8085 instruction set is classified into 3 categories by considering the length of the instructions. In 8085, the length is measured in terms of “byte” rather then “word” because 8085 microprocessor has 8-bit data bus. Three types of instruction are: 1-byte instruction, 2-byte instruction, and 3-byte instruction.
How many instructions are there in 8085 microprocessor?
The 8085 (from Intel) is an 8-bit microprocessor. – The 8085 uses a total of 246 bit patterns to form its instruction set. – These 246 patterns represent only 74 instructions.
Which of the following is 2-byte instruction in 8085 processor?
OUT is a 2-byte instruction as it requires 2-Bytes, 3-Machine Cycles (Opcode Fetch, Memory Read, I/O Write) and 10 T-States. STA is a 2-byte instruction requires 3-Bytes, 4-Machine Cycles (Opcode Fetch, Memory Read, Memory Read, Memory Write) and 13 T-States.
Which is 3 byte instruction of 8085?
In a 3-byte instruction, the first byte specifies the opcode, and the following two bytes specify the 16-bit address. The 2nd byte holds the low order address. The 3rd-byte holds the high order address. Instructions require three memory locations to store the single byte in the memory.
What is 8085 instruction set?
Data Transfer Group
| Instruction Set | Explanation | Machine Cycles |
|---|---|---|
| MOV M, r [[H-L]]←[r] | Move the content of register to memory | 2 |
| MVI r, data [r] ←data | Move immediate data to register | 3 |
| LXI rp, data 16 [rp] ←data 16 bits, [rh] ←8 MSBs, [rl] ←8 LSBs of data | Load Register pair immediate | 3 |
| LDA addr [A] ←[addr] | Load Accumulator direct | 4 |
Which of the following is one byte instruction Mcq?
Discussion Forum
| Que. | The length of the one-byte machine language instruction is |
|---|---|
| b. | 1 byte |
| c. | 3 bytes |
| d. | 4 bytes |
| Answer:1 byte |
What are the types of instruction format?
Computer Organization | Instruction Formats (Zero, One, Two and Three Address Instruction)
- Operation field specifies the operation to be performed like addition.
- Address field which contains the location of the operand, i.e., register or memory location.
- Mode field which specifies how operand is to be founded.
What are instructions in microprocessor?
An instruction is a binary pattern designed inside the microprocessor to perform a specific function. In other words, it is actually a command to the microprocessor to perform a given task on specified data. Instruction Set. The entire group of these instructions are called instruction set.
What is an instruction set in 8085?
An instruction is a binary pattern designed inside a microprocessor to perform a specific function. The entire group of instructions that a microprocessor supports is called Instruction Set. 8085 has 246 instructions. Each instruction is represented by an 8-bit binary value.
How many instructions are there in 8086 microprocessor?
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.
Which one of the following instruction is a 3 byte instruction Mcq?
Discussion Forum
| Que. | In a 3 byte instruction of 8085, the first, second and third byte respectively indicate |
|---|---|
| b. | low order byte of data / address, high order byte of data / address and operation code |
| c. | high order byte of data / address, low order byte of data / address and operation code |
What is the instruction set of 8085 microprocessor?
Instruction Set of 8085. An instruction is a binary pattern designed inside a microprocessor to perform a specific function. The entire group of instructions that a microprocessor supports is called Instruction Set. 8085 has 246 instructions.
How many instructions are there in a microprocessor?
An instruction is a binary pattern designed inside a microprocessor to perform a specific function. The entire group of instructions that a microprocessor supports is called Instruction Set. 8085 has 246 instructions.
What is LDA instruction in 8085 microprocessor?
In 8085 Instruction set, LDA is a mnemonic that stands for LoaD Accumulator with the contents from memory. In this instructionAccumulatorwill get initialized with 8-bit content from the 16-bit memory address as indicated in the instruction as a16. This instruction uses absolute addressing for specifying the data. It occupies 3-Bytes in the memory.
What are the flags in 8085 processor?
Like wise each of the flags have significance in 8085 processor. These are 8 bit general purpose registers such as B,C,D,E,H,L as mentioned.