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 .
What are the different types of instruction in 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 groups are there in instruction set of 8085?
The Instruction Set of 8085 can be categorised into five different groups based on the nature of functions the instruction carry out: Data Transfer Group. Arithmetic Group. Logic Group.
What are the number of instruction used in 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 |
|---|
How are instructions classified?
Three types of instruction are: 1-byte instruction, 2-byte instruction, and 3-byte instruction . In 1-byte instruction, the opcode and the operand of an instruction are represented in one byte.
Which Interrupt has the highest priority?
Explanation: The Non-Maskable Interrupt input pin has the highest priority among all the external interrupts. Explanation: TRAP is the internal interrupt that has highest priority among all the interrupts except the Divide By Zero (Type 0) exception.
What is the use of addressing modes?
An addressing mode specifies how to calculate the effective memory address of an operand by using information held in registers and/or constants contained within a machine instruction or elsewhere.
Which stack is used in 8085?
Answer: LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
What is difference between microprocessor and microcontroller?
Ultimately, microcontrollers and microprocessors are different ways of organizing and optimizing a computing system based on a CPU . While a microcontroller puts the CPU and all peripherals onto the same chip, a microprocessor houses a more powerful CPU on a single chip that connects to external peripherals.
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 is instruction with example?
The definition of instruction is the act of educating, giving the steps that must be followed or an order. An example of instruction is someone giving another person detailed directions to the library . noun.
Which interrupt has lowest priority?
Explanation: The interrupt, RI=TI (serial port) is given the lowest priority among all the interrupts.
Which interrupt of 8085 has highest priority?
| Interrupt Priority Mask | TRAP (RST 4.5) 1 (Highest) Non-maskable | RST 7.5 2 Maskable | RST 6.5 3 Maskable | RST 5.5 4 Maskable |
|---|
Which interrupt has the highest?
Explanation: TRAP is the internal interrupt that has highest priority among all the interrupts except the Divide By Zero (Type 0) exception.
How many types of addressing modes are there?
The most common types of addressing modes are immediate, indirect, direct, indexed, and register addressing modes . In the immediate addressing mode, the operand field contains the operand itself, which is usually the numerical value of the operand.
