The number of software interrupts in 8085 is ____ a) 5 b)
8

1 Answer

Answer :

b)
8

Related questions

Description : How many interrupts does 8085 have, mention them

Last Answer : The 8085 has 5 interrupt signals; they are INTR, RST7.5, RST6.5, RST5.5 and TRAP

Description : Explain priority interrupts of 8085.

Last Answer : The 8085 microprocessor has five interrupt inputs. They are TRAP, RST 7.5, RST 6.5, RST 5.5, and INTR. These interrupts have a fixed priority of interrupt service. If two or more interrupts go ... 8085 is shown in the table. Interrupts Priority TRAP RST 7.5 RST 6.5 RST 5.5 INTR

Description : What are software interrupts? a) RST 0 - 7 b) RST 5.5 - 7.5 c) INTR, TRAP

Last Answer : a) RST 0

Description : Interrupts which are initiated by an I/O drive are a. internal b. external c. software d. all of above

Last Answer : b. external

Description : Interrupts which are initiated by an instruction are a. internal b. external c. hardware d. software

Last Answer : b. external

Description : Interrupts which are initiated by an instruction are a. internal b. external c. hardware d. software

Last Answer : d. software

Description : 8086 is interfaced to two 8259s (Programmable interrupt controllers). If 8259s are in master slave configuration the number of interrupts available to the 8086 microprocessor is a) 8 b) 16 c) 15 d) 64

Last Answer : a) 8

Description : In 8086, Example for Non maskable interrupts are a) Trapb) RST6.5 c) INTR

Last Answer : a) Trap

Description : What are level Triggering interrupts? a) INTR&TRAP b)RST6.5&RST5.5 c)RST7.5&RST6.5

Last Answer : b)RST6.5&RST5.5

Description : Which of the following is hardware interrupts? a) RST5.5, RST6.5, RST7.5 b) INTR, TRAP c) a & b

Last Answer : c) a & b

Description : Why 8085 processor is called an 8 bit processor? a) Because 8085 processor has 8 bit ALU. b) Because 8085 processor has 8 bit data bus. c) a & b.

Last Answer : a) Because 8085 processor has 8 bit ALU.

Description : What type of control pins are needed in a microprocessor to regulate traffic on the bus, in order to prevent two devices from trying to use it at the same time? a. Bus control b. Interrupts c. Bus arbitration d. Status

Last Answer : c. Bus arbitration

Description : Which is used to store critical pieces of data during subroutines and interrupts: a. Stack b. Queue c. Accumulator d. Data register

Last Answer : a. Stack

Description : n 8086 microprocessor the following has the highest priority among all type interrupts. a) NMI b) DIV 0 c) TYPE 255 d) OVER FLOW

Last Answer : a) NMI

Description : What is meant by Maskable interrupts? a) An interrupt which can never be turned off. b) An interrupt that can be turned off by the programmer. c) none

Last Answer : b) An interrupt that can be turned off by the programmer.

Description : 8085 microprocessor has ............. hardware interrupts. (A) 2 (B) 3 (C) 4 (D) 5

Last Answer : (D) 5

Description : How Many Interrupts Are There In 8085?

Last Answer : Answer :There are 12 interrupts in 8085.

Description : In What Way Interrupts Are Classified In 8085?

Last Answer : Answer :In 8085 the interrupts are classified as Hardware and Software interrupts.

Description : .In an 8085 based system, the maximum number of input output devices can be connectedusing I/0 mapped I/O method isa) 64 b) 512 c) 256 d) 65536

Last Answer : b) 512

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 

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

Description : Which interrupt is not level sensitive in 8085? a) RST6.5 is a raising edge-trigging interrupt. b) RST7.5 is a raising edge-trigging interrupt. c) a & b.

Last Answer : b) RST7.5 is a raising edge-trigging interrupt.

Description : How many machine cycles does 8085 have, mention them

Last Answer : The 8085 have seven machine cycles. They are • Opcode fetch • Memory read • Memory write • I/O read • I/O write • Interrupt acknowledge • Bus idle

Description : Steps involved to fetch a byte in 8085

Last Answer : i. The PC places the 16-bit memory address on the address bus ii. The control unit sends the control signal RD to enable the memory chip iii. The byte from ... byte is placed in the instruction decoder of the microprocessor and the task is carried out according to the instruction

Description : What are operations performed on data in 8085

Last Answer : The various operations performed are • Store 8-bit data • Perform arithmetic and logical operations • Test for conditions • Sequence the execution of instructions • Store data temporarily during execution in the defined R/W memory locations called the stack

Description : What is the signal classification of 8085

Last Answer : All the signals of 8085 can be classified into 6 groups • Address bus • Data bus • Control and status signals • Power supply and frequency signals • Externally initiated signals • Serial I/O ports

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 )

Description : List out the five categories of the 8085 instructions. Give examples of the instructions for each group.

Last Answer : • Data transfer group – MOV, MVI, LXI. • Arithmetic group – ADD, SUB, INR. • Logical group –ANA, XRA, CMP. • Branch group – JMP, JNZ, CALL. • Stack I/O and Machine control group – PUSH, POP, IN, HLT.

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

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

Description : What is the function of IO/M signal in the 8085?

Last Answer : It is a status signal. It is used to differentiate between memory locations and I/O operations. When this signal is low (IO/M = 0) it denotes the memory related operations. When this signal is high (IO/M = 1) it denotes an I/O operation.

Description : List the allowed register pairs of 8085.

Last Answer : • B-C register pair • D-E register pair • H-L register pair

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

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

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.

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.

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.

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

Last Answer : d. All of these

Description : Which is the main feature of 8085: a. Internal clock generator b. Internal system controller c. Higher clock frequency d. All of these

Last Answer : d. All of these

Description : In 1977 which corporation introduced an updated version of the 8080- the 8085: a. Motorola b. Intel c. Rockwell d. National

Last Answer : b. Intel

Description : Which year Intel corporation introduced an updated version of the 8080- the 8085: a. 1965 b. 1976 c. 1977 d. 1985

Last Answer : c. 1977

Description : Intel used HMOS technology to recreate_____: a. 8084 A b. 8086 A c. 8085 A d. 8088 A

Last Answer : c. 8085 A

Description : Which are some of popular processor: a. Motorola 6800 and 6809 b. Intel 8085 c. Zilog Z80 d. All the above

Last Answer : d. All the above

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

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

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Description : 8253, 8257 c) 8257,8251 d)8251,825721.Consider the following set of 8085 instruction.MVI A,82HORA AJP DSPLYXRA ADSPLY:OUT PORT1HLT.The output at PORT1 isa) 00H b) FFH c) 92H d) 11H

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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

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

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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

Description : Which stack is used in 8085? a) FIFO b) LIFO c) FILO

Last Answer : b) LIFO

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

Last Answer : c) a & b

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.