State the functions of temporary registers of 8085 microprocessor.

State the functions of temporary registers of 8085 microprocessor.
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1 Answer

Answer :

Temp Register (8 bits) is also called as operand register as it is used by μp for storing one of the operands during an operation and also for storing the result of any execution temproary.
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Related questions

Enlist the features of 8085 microprocessor.

Description : Enlist the features of 8085 microprocessor.

Last Answer : Features of 8085 microprocessor: 1. 16 address line so 216=64 Kbytes of memory can be addressed. 2. Operating clock frequency is 3MHz and minimum clock  frequency is 500 KHz. 3. On chip bus ... cycle TTL clock 10. Provide 2 serial I/O lines, so peripheral can be interfaced with  8085 μp

State the functions of following pins of 8085 1) SOD 2) HLDA

Description : State the functions of following pins of 8085 1) SOD 2) HLDA

Last Answer : 1) SOD: Serial Output data SOD pin is used to transmit data serially from accumulator to the external devices connected to the pin.  2) HLDA: Microprocessor generates HLDA signal to acknowledge requesting device after HOLD signal.

Describe the functions of stack pointer and program counter of 8085.

Description : Describe the functions of stack pointer and program counter of 8085. 

Last Answer : Stack pointer: 1. It is a 16 bit register which is used to store the address of topmost filled memory location of stack memory. 2. SP always points current top of stack. 3. If data is ... of memory and in 8085 the address of memory is 16 bit. Hence program counter is 16 bit register.

State the use of OF and DF flags of 8086 microprocessor.

Description : State the use of OF and DF flags of 8086 microprocessor.

Last Answer : Overflow Flag: This flag is set if an overflow occurs, i.e. if the result of a signed operation is large enough to be accommodated in destination register. Direction Flag: It selects either increment or decrement mode for DI &/or SI register during string instructions.

Write an algorithm to subtract two 16 bit numbers (With borrow) in 8086 microprocessor.

Description : Write an algorithm to subtract two 16 bit numbers (With borrow) in 8086 microprocessor.

Last Answer : Algorithm for 16 bit numbers subtraction with borrow: 1. Load 0000H into CX register (for borrow) 2. Load the first number into AX(accumulator) 3. Load the second number into BX register 4. Subtract ... . Move data from AX(accumulator) to memory 8. Move data from CX register to memory 9. Stop

Enlist any four addressing modes of 8086 microprocessor.

Description : Enlist any four addressing modes of 8086 microprocessor.

Last Answer : Addressing modes of 8086 : 1. Immediate 2. Direct 3. Register 4. Register indirect 5. Indexed 6. Register relative 7. Based indexed 8. Relative based indexed 9. Implied

Define memory segmentation. How memory segmentation is achieved in 8086? State advantages of memory segmentation.

Description : Define memory segmentation. How memory segmentation is achieved in 8086? State advantages of memory segmentation.

Last Answer : Memory Segmentation: The memory in an 8086 microprocessor is organized as a segmented memory. The physical memory is divided into 4 segments namely, - Data segment, Code Segment, Stack Segment and Extra ... 16 bit size. 6) Programs and data can be stored separately from each other in segmentation.

Describe re-entrant procedure with the help of schematic diagram.

Description : Describe re-entrant procedure with the help of schematic diagram.

Last Answer : Re-entrant Procedures: A procedure is said to be re-entrant, if it can be interrupted, used and re-entered without losing or writing over anything. To be a re-entrant, Procedure ... program execution flow reenters in the procedure1. These types of procedures are called reentrant procedures.

Explain the following assembler directives. 1) DB 2) DUP 3) EQU 4) ENDs.

Description : Explain the following assembler directives. 1) DB 2) DUP 3) EQU 4) ENDs.

Last Answer : 1) DB (Define Byte or Data Byte): This is used to define a byte type variable. The range of values : 0 - 255 for unsigned numbers -128 to 127 for signed numbers This can be used ... the end of the segment The directives SEGMENT, ENDS are always enclosed in data, code, stack and extra segments.

Write an algorithm and draw the flowchart to find sum of series of numbers.

Description : Write an algorithm and draw the flowchart to find sum of series of numbers. 

Last Answer : Algorithim to find sum of series of numbers: 1. Initialize data segment 2. Initialize byte counter and memory pointer to read number from array. 3. Initialize sum variable to 0 4. sum=sum+number from array ... Decrement byte counter 9. If byte counter=0 then step 10 else step 4 10. Stop

Define pipelining.

Description : Define pipelining.

Last Answer : Pipelining: Process of fetching the next instruction while the current instruction is executing is called pipelining which will reduce the execution time.

List the 16 – bit registers of 8085 microprocessor.

Description : List the 16 – bit registers of 8085 microprocessor.

Last Answer : Stack pointer (SP) and Program counter (PC).

Describe the functions of General purpose registers of 8086 microprocessor.

Description : Describe the functions of General purpose registers of 8086 microprocessor.

Last Answer : (i) General Purpose Registers of 8086 1. AX (Accumulator) - Used to store the result for arithmetic / logical operations All I/O data transfer using IN & OUT instructions use A ... Index - acts as the destination for string movement instructions Used to hold offset address of Extra segment.

In 8085 name the 16 bit registers? a) Stack pointer b) Program counter c) a & b

Description : In 8085 name the 16 bit registers? a) Stack pointer b) Program counter c) a & b

Last Answer : c) a & b

To put the 8085 microprocessor in the wait state(i) lower the-HOLD input (ii) lower the READY input (iii) raise the HOLD input(iv) raise the READY input

Description : To put the 8085 microprocessor in the wait state(i) lower the-HOLD input (ii) lower the READY input (iii) raise the HOLD input(iv) raise the READY input

Last Answer : (ii) lower the READY input

What Are The Boons And Banes Of Having More General Purpose Registers In A Microprocessor.?

Description : What Are The Boons And Banes Of Having More General Purpose Registers In A Microprocessor.?

Last Answer : Answer :If there are more general purpose registers the program writing process is more flexible and convenient. The number of bits that would be required to detect the registers would increase with more ... on the chip. This can create problems in adding / implementing other functions on the chip.

List the four instructions which control the interrupt structure of the 8085 microprocessor.

Description : List the four instructions which control the interrupt structure of the 8085 microprocessor.

Last Answer : • DI ( Disable Interrupts ) • EI ( Enable Interrupts ) • RIM ( Read Interrupt Masks ) • SIM ( Set Interrupt Masks )

How many operations are there in the instruction set of 8085 microprocessor?

Description : How many operations are there in the instruction set of 8085 microprocessor?

Last Answer : There are 74 operations in the 8085 microprocessor.

What is Microprocessor? Give the power supply & clock frequency of 8085

Description : What is Microprocessor? Give the power supply & clock frequency of 8085

Last Answer : A microprocessor is a multipurpose, programmable logic device that reads binary instructions from a storage device called memory accepts binary data as input and processes data according ... provides result as output. The power supply of 8085 is +5V and clock frequency in 3MHz.

What type of architecture is used in 8085 microprocessor?

Description : What type of architecture is used in 8085 microprocessor?

Last Answer : Ans- INTEL 8085 is a 8-bit microprocessor. It's based on Von-Neumann architecture in which the data and instructions are in the same memory space without any distinction between them. Data line: 8-bits--Can ... of data at a time. Address line: 16-bits--Can address upto 2^16(64KB) of address space.

What is function of ALE in 8085 microprocessor?

Description : What is function of ALE in 8085 microprocessor?

Last Answer : Ans-AlE stands for the address latch enableit 's working is that it differentiate the address and data bus in microprocessor.when it is high it select address bus .when it is low it select data bus.

How many speed of 8088,8085,8086 microprocessor: a. 2.5 Million instruction per second b. 1.5 Million instruction per second c. 3.5 Million instruction per second d. 1.6 Million instruction per second

Description : How many speed of 8088,8085,8086 microprocessor: a. 2.5 Million instruction per second b. 1.5 Million instruction per second c. 3.5 Million instruction per second d. 1.6 Million instruction per second

Last Answer : a. 2.5 Million instruction per second

Which is 16 Bit microprocessor: a. 8088 b. 8086 c. 8085 d. All of these

Description : Which is 16 Bit microprocessor: a. 8088 b. 8086 c. 8085 d. All of these

Last Answer : d. All of these

The___ was very successful in the calculator market at that time: a. Motorola 6800 and 6809 b. Microprocessor 4004 c. Intel 8085 d. None of these

Description : The___ was very successful in the calculator market at that time: a. Motorola 6800 and 6809 b. Microprocessor 4004 c. Intel 8085 d. None of these

Last Answer : b. Microprocessor 4004

Microprocessor 8085 can address location upto a. 32K b. 128K c. 64K d. 1M

Description : Microprocessor 8085 can address location upto a. 32K b. 128K c. 64K d. 1M

Last Answer : c. 64K

In an 8085 microprocessor, the instruction CMP B has been executed while the contentsof accumulator is less than that of register B. As a result carry flag and zero flag will berespectively (A) set, reset (B) reset, set (C) reset, reset (D) set, set

Description : In an 8085 microprocessor, the instruction CMP B has been executed while the contentsof accumulator is less than that of register B. As a result carry flag and zero flag will berespectively (A) set, reset (B) reset, set (C) reset, reset (D) set, set

Last Answer : (A) set, reset

Accumulator based microprocessor example are: a. Intel 8085 b. Motorola 6809 c. A and B d. None of these

Description : Accumulator based microprocessor example are: a. Intel 8085 b. Motorola 6809 c. A and B d. None of these

Last Answer : c. A and B

Explain Briefly The Flag Register In The 8085 Microprocessor.?

Description : Explain Briefly The Flag Register In The 8085 Microprocessor.?

Last Answer : Answer :The flag register in 8085 is an 8-bit register which contains 5 bit positions. These five flags are of 1bit F/F and are known as zero, sign, carry, parity and auxiliary carry. ... addition and subtraction operations. The parity flag is used for results containing an even number of one's.

Mention The Various Functional Blocks Of The 8085 Microprocessor.?

Description : Mention The Various Functional Blocks Of The 8085 Microprocessor.?

Last Answer : Answer :The various functional blocks of the 8085 microprocessor are: Registers Arithmetic logic unit Address buffer Increment / decrement address latch Interrupt control Serial I/O control Timing and control circuitry Instructions decoder and machine cycle encoder.

How Can Signals Be Classified For The 8085 Microprocessor?

Description : How Can Signals Be Classified For The 8085 Microprocessor?

Last Answer : Answer :The signals of the 8085 microprocessor based on their functions can be classified into 7 categories namely: Frequency and power signals Address and data buses The control bus Interrupt Signals Serial Input / Output signals DMA signals Reset Signals

List any four salient features of 8085 microprocessor

Description : List any four salient features of 8085 microprocessor

Last Answer : Features of 8085:  1. 16 address line so 216=64 Kbytes of memory can be addressed.  2. Operating clock frequency is 3MHz and minimum clock frequency is 500 KHz.  3. On chip bus controller ... duty cycle TTL clock  10. Provide 2 serial I/O lines, so peripheral can be interfaced with 8085 μp

The 8085 Microprocessor has

Description : The 8085 Microprocessor has A) 8-bits Data bus and 16-bits Address bus B) 8-bits Data bus and 8-bits Address bus C) 16-bits Data bus and 16-bits Address bus D) 32-bits Data bus and 8-bits Address bus 

Last Answer : B) 8-bits Data bus and 8-bits Address bus. 

The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse

Description : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

Last Answer : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require

Description : In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require (i.e., when HOLD and WAIT signals are NOT forced)? A) 4 to 6 B) 3 to 8 C) 2 to 3 D) 8 to 12 

Last Answer : In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require (i.e., when HOLD and WAIT signals are NOT forced)? A) 4 to 6 B) 3 to 8 C) 2 to 3 D) 8 to 12 

Then number of T-states of the instruction STA in 8085 microprocessor is

Description : Then number of T-states of the instruction STA in 8085 microprocessor is A) 10 B) 12 C) 13 D) 16 

Last Answer : Then number of T-states of the instruction STA in 8085 microprocessor is 13 

What is the size of memory which can be accessed by direct accessing in 8085 microprocessor?

Description : What is the size of memory which can be accessed by direct accessing in 8085 microprocessor? A) 64 kB B) 4 kB C) 128 kB D) 128 MB 

Last Answer : What is the size of memory which can be accessed by direct accessing in 8085 microprocessor? A) 64 kB B) 4 kB C) 128 kB D) 128 MB 

What is the size of SP register in 8085 microprocessor?

Description :  What is the size of SP register in 8085 microprocessor? A) 16 bits B) 8 bits C) 64 bits D) 48 bits

Last Answer :  What is the size of SP register in 8085 microprocessor? A) 16 bits B) 8 bits C) 64 bits D) 48 bits

Which of the following instructions is not available in 8085 microprocessor?

Description : Which of the following instructions is not available in 8085 microprocessor? (A) LDA 3850 (B) XTHL (C) push PSW (D) LDAXH

Last Answer : Which of the following instructions is not available in 8085 microprocessor? (A) LDA 3850 (B) XTHL (C) push PSW (D) LDAXH

The ALE line of an 8085 microprocessor is used to

Description : The ALE line of an 8085 microprocessor is used to (A) latch the output of an I/O instruction into an external latch. (B) deactivate the chip-select signal from memory devices. (C) find the interrupt ... of the TRAP interrupt. (D) latch the 8 bits of address lines AD7-AD0 into an external latch.

Last Answer : The ALE line of an 8085 microprocessor is used to latch the 8 bits of address lines AD7-AD0 into an external latch.

Microprocessor is a/an _______ circuit that functions as the CPU of the compute

Description : Microprocessor is a/an _______ circuit that functions as the CPU of the compute  A. electronic B. mechanic C. integrating D. processing

Last Answer : Microprocessor is a/an electronic  circuit that functions as the CPU of the compute 

A microprocessor is a _______ chip integrating all the functions of a CPU of a computer.

Description : A microprocessor is a _______ chip integrating all the functions of a CPU of a computer.  A. multiple B. single C. double D. triple

Last Answer : A microprocessor is a single chip integrating all the functions of a CPU of a computer.

Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory Address Register b. Memory Data Register c. Instruction Register d. Program Register

Description : Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory Address Register b. Memory Data Register c. Instruction Register d. Program Register

Last Answer : d. Program Register

Registers, which are partially visible to users and used to hold conditional, are known as a. PC b. Memory address registers c. General purpose register d. Flags

Description : Registers, which are partially visible to users and used to hold conditional, are known as a. PC b. Memory address registers c. General purpose register d. Flags

Last Answer : c. General purpose register

Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory address register b. Memory data register c. Instruction register d. Program counter

Description : Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory address register b. Memory data register c. Instruction register d. Program counter

Last Answer : d. Program counter

Which of the following registers is loaded with the contents of the memory location pointed by the PC? a. Memory address register b. Memory data register c. Instruction registers d. Program counter

Description : Which of the following registers is loaded with the contents of the memory location pointed by the PC? a. Memory address register b. Memory data register c. Instruction registers d. Program counter

Last Answer : c. Instruction registers

The ALU of a computer normally contains a number of high speed storage element called a. Semiconductor memory b. Registers c. Hard disks d. Magnetic disk

Description : The ALU of a computer normally contains a number of high speed storage element called a. Semiconductor memory b. Registers c. Hard disks d. Magnetic disk

Last Answer : b. Registers

Which of the following are the two main components of the CPU? a. Control unit and registers b. Registers and main memory c. Control Unit and ALU d. ALU and bus

Description : Which of the following are the two main components of the CPU? a. Control unit and registers b. Registers and main memory c. Control Unit and ALU d. ALU and bus

Last Answer : c. Control Unit and ALU

Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory address register b. Memory data register c. Instruction register d. Program counter

Description : Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory address register b. Memory data register c. Instruction register d. Program counter

Last Answer : d. Program counter

Which of the following registers is loaded with the contents of the memory location pointed by the PC? a. Memory address registers b. Memory data registers c. Instruction register d. Program counter

Description : Which of the following registers is loaded with the contents of the memory location pointed by the PC? a. Memory address registers b. Memory data registers c. Instruction register d. Program counter

Last Answer : c. Instruction register

In 8087, _______ many register stack are there? And of _____ registers. These registers are used as _________ stack. a) 7, 40 bit, FIFO. b) 8, 60 bit, LILO. c) 8, 80 bit, LIFO d) 7, 80 bit, FILO.

Description : In 8087, _______ many register stack are there? And of _____ registers. These registers are used as _________ stack. a) 7, 40 bit, FIFO. b) 8, 60 bit, LILO. c) 8, 80 bit, LIFO d) 7, 80 bit, FILO.

Last Answer : b) 8, 60 bit, LILO.