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 : 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 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 : Who was introduce the 80286 microprocessor updated on 8086,in 1983: a. Intel b. Motorola c. Fairchild d. None of these
Last Answer : a. Intel
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 is 16 Bit microprocessor: a. 8088 b. 8086 c. 8085 d. All of these
Last Answer : d. All of these
Description : In 8086 microprocessor one of the following instructions is executed before an arithmeticoperation a. AAM b) AAD c) DAS d) DAA
Last Answer : b) AAD
Description : In 8086 microprocessor one of the following statements is not true.a)Coprocessor is interfaced in MAX mode b)Coprocessor is interfaced in MIN mode c)I/O can be interfaced in MAX / MIN moded)Supports pipelining
Last Answer : b)Coprocessor is interfaced in MIN mode
Description : 8086 microprocessor is interfaced to 8253 a programmable interval timer. The maximum number by which the clock frequency on one of the timers is divided by a) 216 b) 28 c) 210 d) 220
Last Answer : d) 220
Description : In 8086 microprocessor one of the following instructions is executed before an arithmetic operation a) AAM b) AAD c) DAS d) DAA
Description : 8088 microprocessor differs with 8086 microprocessor in a) Data width on the output b) Address capability c) Support of coprocessor d) Support of MAX / MIN mode
Last Answer : a) Data width on the output
Description : In 8086 microprocessor one of the following statements is not true. a) Coprocessor is interfaced in MAX mode b) Coprocessor is interfaced in MIN mode c) I/O can be interfaced in MAX / MIN mode
Last Answer : b) Coprocessor is interfaced in MIN mode
Description : BHE of 8086 microprocessor signal is used to interface the a) Even bank memory b) Odd bank memory c) I/O d) DMA
Last Answer : b) Odd bank memory
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
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
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.
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.
Description : The 16 bit flag of 8086 microprocessor is responsible to indicate ___________ A. the condition of result of ALU operation B. the condition of memory C. the result of addition D. the result of subtraction
Last Answer : The 16 bit flag of 8086 microprocessor is responsible to indicate the condition of result of ALU operation
Description : In 8086 microprocessor , the address bus is ________ bit wide A. 12 bit B. 10 bit C. 16 bit D. 20 bit
Last Answer : In 8086 microprocessor, the address bus is 20 bit
Description : The intel 8086 microprocessor is a _______ processor A. 8 bit B. 16 bit C. 32 bit D. 4 bit
Last Answer : The intel 8086 microprocessor is a 16 bit processor
Description : One of the following signals belongs to the 8087 coprocessor is a. HOLD b. BUSY c. TEST d. NMI
Last Answer : c. TEST
Description : If ______ and ________ connections are made so that an error condition in 8087 can interrupt to the processor. a) BHE, RQ/GT1 b) BUSY, TEST c) INT, NMI d) RQ/GT0, RQ/GT1
Last Answer : c) INT, NMI
Description : ___ Connection and the _______ instruction will solve the problem of synchronization between processor and coprocessor. a) INT & NMI, WAIT b) RQ/GT0 & RQ/GT1, FWAIT c) BUSY & TEST, FWAIT d) S0 & QS0, WAIT
Last Answer : b) RQ/GT0 & RQ/GT1, FWAIT
Description : In 8051 which interrupt has highest priority? a)IE1 b)TF0 c)IE0 d)TF1
Last Answer : a)IE1
Last Answer : c)IE0
Description : Which interrupt has the highest priority? a) INTR b) TRAP c) RST6.5
Last Answer : c) RST6.5
Description : What is the output of the following code AL=00110101 BL= 39H M. Krishna Kumar/IISc. Bangalore M2/V1/June 04/1 Microprocessors and Microcontrollers/Assembly language of 8086 Multiple Choice Questions SUB AL, BL AAS ... , CF=1 b) BL=00000100, CF=0 c) AL=11111100 CF=1 d) BL= 00000100, CF=1
Last Answer : b) BL=00000100, CF=0
Description : What are software interrupts? a) RST 0 - 7 b) RST 5.5 - 7.5 c) INTR, TRAP
Last Answer : a) RST 0
Description : What is the output of the following code AX = 37D7H, BH = 151 decimal DIV BH a) AL = 65H, AH= 94 decimal b) AL= 5EH, AH= 101 decimal c) AH= E5H, AL= 5EH d) AL= 56H, AH= 5EH
Last Answer : b) AL= 5EH, AH= 101 decimal
Description : IDIV and DIV instructions perform the same operations for? a) Unsigned number b) Signed number c) Signed number & Unsigned number d) none of above.
Last Answer : b) Signed number
Description : Which processor provided 1 MB memory: a. 16-bit 8086 and 8088 b. 32-bit 8086 and 8088 c. 64-bit 8086 and 8088 d. 8-bit 8086 and 8088
Last Answer : a. 16-bit 8086 and 8088
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 : .How many transistors does the 8086 have?a) 10,000b ) 29,000 c) 110,000d) 129,000
Last Answer : ) 29,000
Description : 8087 connection to 8086, to enable the _________ bank of memory _______pins are to be connected. a) Lower, BHE b) Upper, BHE c) Lower, INT d) Upper, INT.
Last Answer : a) Lower, BHE
Description : In 8086 the overflow flag is set when a) The sum is more than 16 bits b) Signed numbers go out of their range after an arithmetic operation c) Carry and sign flags are set
Last Answer : b) Signed numbers go out of their range after an arithmetic operation
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.
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 : 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 : d. software
Description : The number of software interrupts in 8085 is ____ a) 5 b) 8
Last Answer : b) 8
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 : 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 : 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 : 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 : Answer : C
Description : What is the clock frequency of 8086 microprocessor?
Last Answer : MAximum clock frequency of 8086 is 5MHZ.
Description : Which of the following is not an XT microprocessor? A) 8006 B) 8086 C) 8088 D) None of above
Last Answer : Answer : D