Control signals used for DMA operation are ____________

Control signals used for DMA operation are ____________
by

1 Answer

Answer :

HOLD & HLDA.
by

Related questions

The CPU completes yields control of the bus to the DMA controller via: a. DMA acknowledge signal b. DMA integrated signal c. DMA implicitly signal d. None of these

Description : The CPU completes yields control of the bus to the DMA controller via: a. DMA acknowledge signal b. DMA integrated signal c. DMA implicitly signal d. None of these

Last Answer : a. DMA acknowledge signal

Interfacing devices for DMA controller, programmable interval timer are respectively…a) 8257, 8253 b) 8253, 8257 c) 8257,8251 d)8251,825721.

Description : Interfacing devices for DMA controller, programmable interval timer are respectively…a) 8257, 8253 b) 8253, 8257 c) 8257,8251 d)8251,825721.

Last Answer : a) 8257, 8253

The mode of DMA are: a. Single transfer b. Block transfer c. Burst –block transfer d. Repeated single transfer e. Repeated–block transfer f. Repeated Burst –block transfer g. All of these

Description : The mode of DMA are: a. Single transfer b. Block transfer c. Burst –block transfer d. Repeated single transfer e. Repeated–block transfer f. Repeated Burst –block transfer g. All of these

Last Answer : g. All of these

The DMA controllers are special hardware embedded into the chip in modern integrate processor that ____and_____ to the system; a. Data transfer b. arbitrate access c. Both A and B d. None of these

Description : The DMA controllers are special hardware embedded into the chip in modern integrate processor that ____and_____ to the system; a. Data transfer b. arbitrate access c. Both A and B d. None of these

Last Answer : c. Both A and B

DMA stands for: a. Dynamic memory access b. Data memory access c. Direct memory access d. Both B and C

Description : DMA stands for: a. Dynamic memory access b. Data memory access c. Direct memory access d. Both B and C

Last Answer : d. Both B and C

DMA stands for: a. Direct memory access b. Direct memory allocation c. Data memory access d. Data memory allocation

Description : DMA stands for: a. Direct memory access b. Direct memory allocation c. Data memory access d. Data memory allocation

Last Answer : a. Direct memory access

BHE of 8086 microprocessor signal is used to interface the a) Even bank memory b) Odd bank memory c) I/O d) DMA

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

Which are the READ operation can in simple steps: a. Address b. Data c. Control d. All of these

Description : Which are the READ operation can in simple steps: a. Address b. Data c. Control d. All of these

Last Answer : d. All of these

In 8255, under the I/O mode of operation we have __ modes. Under which mode will have the following features i) A 5 bit control port is available. ii) Three I/O lines are available at Port C. a) 3, Mode2 b) 2, Mode 2 c) 4, Mode 3 d) 3, Mode 2

Description : In 8255, under the I/O mode of operation we have __ modes. Under which mode will have the following features i) A 5 bit control port is available. ii) Three I/O lines are available at Port C. a) 3, Mode2 b) 2, Mode 2 c) 4, Mode 3 d) 3, Mode 2

Last Answer : a) 3, Mode2

Explain the signals HOLD, READY and SID

Description : Explain the signals HOLD, READY and SID

Last Answer : HOLD indicates that a peripheral such as DMA controller is requesting the use of address bus, data bus and control bus. READY is used to delay the microprocessor ... slow responding peripheral is ready to send or accept data. SID is used to accept serial data bit by bit

Which of the following is form of semi conductor memory in which it is possible to change the contents of selected memory locations by applying suitable electrical signals? a. CAM b. ROM c. EPROM d. Abacus

Description : Which of the following is form of semi conductor memory in which it is possible to change the contents of selected memory locations by applying suitable electrical signals? a. CAM b. ROM c. EPROM d. Abacus

Last Answer : c. EPROM

In which form CPU provide output: a. Computer signals b. Digital signals c. Metal signals d. None of these

Description : In which form CPU provide output: a. Computer signals b. Digital signals c. Metal signals d. None of these

Last Answer : b. Digital signals

Interfacing LCD with 89C51 _____ data lines are used along with the _____ signals. a) 6, RS, RW b) 5, RW, EN c) 8, RS, EN, RW d) 9, RS, EN, RW

Description : Interfacing LCD with 89C51 _____ data lines are used along with the _____ signals. a) 6, RS, RW b) 5, RW, EN c) 8, RS, EN, RW d) 9, RS, EN, RW

Last Answer : a) 6, RS, RW

One of the following signals belongs to the 8087 coprocessor is a. HOLD b. BUSY c. TEST d. NMI

Description : One of the following signals belongs to the 8087 coprocessor is a. HOLD b. BUSY c. TEST d. NMI

Last Answer : c. TEST

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

In 8279 Status Word, data is read when ________ pins are low, and write to the display RAM with ____________ are low. a) A0, CS, RD & A0, WR, CS. b) CS, WR, A0 & A0, CS, RD c) A0, RD & WR, CS d) CS, RD & A0, CS.

Description : In 8279 Status Word, data is read when ________ pins are low, and write to the display RAM with ____________ are low. a) A0, CS, RD & A0, WR, CS. b) CS, WR, A0 & A0, CS, RD c) A0, RD & WR, CS d) CS, RD & A0, CS.

Last Answer : c) A0, RD & WR, CS

Who is the represents the fundamental process in the operation of the CPU: a. The fetch-execute cycle and pipelining b. The assembly c. Both A and B d. None of these

Description : Who is the represents the fundamental process in the operation of the CPU: a. The fetch-execute cycle and pipelining b. The assembly c. Both A and B d. None of these

Last Answer : a. The fetch-execute cycle and pipelining

A microporgram is sequencer perform the operation a. read b. write c. execute d. read and write e. read and execute

Description : A microporgram is sequencer perform the operation a. read b. write c. execute d. read and write e. read and execute

Last Answer : e. read and execute

CPU does not perform the operation a. data transfer b. logic operation c. arithmetic operation d. all of above

Description : CPU does not perform the operation a. data transfer b. logic operation c. arithmetic operation d. all of above

Last Answer : b. logic operation

The necessary steps carried out to perform the operation of accessing either memory or I/O Device, constitute a ___________________ a) fetch operation b) execute operation c) machine cycle

Description : The necessary steps carried out to perform the operation of accessing either memory or I/O Device, constitute a ___________________ a) fetch operation b) execute operation c) machine cycle

Last Answer : c) machine cycle

The use of spooler programs and/or …. Hardware allows personal computer operators to do the processing work at the same time a printing operation is in progress a. Registered mails b. Memory c. CPU d. Buffer

Description : The use of spooler programs and/or …. Hardware allows personal computer operators to do the processing work at the same time a printing operation is in progress a. Registered mails b. Memory c. CPU d. Buffer

Last Answer : d. Buffer

The secondary storage devices can only store data but they cannot perform a. Arithmetic Operation b. Logic operation c. Fetch operations d. Either of the above

Description : The secondary storage devices can only store data but they cannot perform a. Arithmetic Operation b. Logic operation c. Fetch operations d. Either of the above

Last Answer : d. Either of the above

Which operation is not performed by computer a. Inputting b. Processing c. Controlling d. Understanding

Description : Which operation is not performed by computer a. Inputting b. Processing c. Controlling d. Understanding

Last Answer : d. Understanding

A___ on this pin indicates a memory operation: a. Low b. High c. Medium d. None of these

Description : A___ on this pin indicates a memory operation: a. Low b. High c. Medium d. None of these

Last Answer : a. Low

The CPU removes the ___ signal to complete the memory write operation: a. Read b. Write c. Both A and B d. None of these

Description : The CPU removes the ___ signal to complete the memory write operation: a. Read b. Write c. Both A and B d. None of these

Last Answer : a. Read

MOC stands for: a. Memory operation complex b. Micro operation complex c. Memory operation complete d. None of these

Description : MOC stands for: a. Memory operation complex b. Micro operation complex c. Memory operation complete d. None of these

Last Answer : c. Memory operation complete

Which is the basic stack operation: a. PUSH b. POP c. BOTH A and B d. None of these

Description : Which is the basic stack operation: a. PUSH b. POP c. BOTH A and B d. None of these

Last Answer : c. BOTH A and B

Single address computer instruction has two parts: a. The operation code b. The operand c. A and B d. None of these

Description : Single address computer instruction has two parts: a. The operation code b. The operand c. A and B d. None of these

Last Answer : c. A and B

To prevent another master from taking over the bus during a critical operation, the 486 can assert its _____signal. a) LOCK# or PLOCK# b) HOLD or BOFF c) HLDA d) HOLD

Description : To prevent another master from taking over the bus during a critical operation, the 486 can assert its _____signal. a) LOCK# or PLOCK# b) HOLD or BOFF c) HLDA d) HOLD

Last Answer : a) LOCK# or PLOCK#

Virtual Mode Flag bit can be set using ____ instruction or any task switch operation only in the _____ mode a) IRET, Virtual b) POPF, Real c) IRET, protected d) POPF, protected

Description : Virtual Mode Flag bit can be set using ____ instruction or any task switch operation only in the _____ mode a) IRET, Virtual b) POPF, Real c) IRET, protected d) POPF, protected

Last Answer : b) POPF, Real

Which of the following statements on DRAM are correct? i) Page mode read operation is faster than RAS read. ii) RAS input remains active during column address strobe. iii) The row and column addresses are strobed into the internal buffers using RAS and CAS inputs respectively. a) i & iii b) i & ii c) all d) iii

Description : Which of the following statements on DRAM are correct? i) Page mode read operation is faster than RAS read. ii) RAS input remains active during column address strobe. iii) The row and column addresses are strobed into the ... RAS and CAS inputs respectively. a) i & iii b) i & ii c) all d) iii

Last Answer : d) iii

In 8086 microprocessor one of the following instructions is executed before an arithmetic operation a) AAM b) AAD c) DAS d) DAA

Description : In 8086 microprocessor one of the following instructions is executed before an arithmetic operation a) AAM b) AAD c) DAS d) DAA

Last Answer : b) AAD

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

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

RIM is used to check whether, ______ a) The write operation is done or not b) The interrupt is Masked or not c) a & b

Description : RIM is used to check whether, ______ a) The write operation is done or not b) The interrupt is Masked or not c) a & b

Last Answer : b) The interrupt is Masked or not

For each micro operation the control unit generates set of_ signals. a. Control b. Address c. Data d. None of these

Description : For each micro operation the control unit generates set of_ signals. a. Control b. Address c. Data d. None of these

Last Answer : a. Control

As shown in the illustrations, fine adjustments such as 'weather' and 'turning rate' have no effect on steering stand operation when the 'operation control switch' is in ____________. EL-0097 A. GYRO B. HAND C. NFU D. DIFF

Description : As shown in the illustrations, fine adjustments such as 'weather' and 'turning rate' have no effect on steering stand operation when the 'operation control switch' is in ____________. EL-0097 A. GYRO B. HAND C. NFU D. DIFF

Last Answer : Answer: C

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 bit microprocessor still survives in low-end application such as microwave ovens and small control system: a. 4 bit b. 16 bit c. 32 bit d. 64 bit

Description : How many bit microprocessor still survives in low-end application such as microwave ovens and small control system: a. 4 bit b. 16 bit c. 32 bit d. 64 bit

Last Answer : a. 4 bit

Which is the components of microprocessor: a. Register unit b. Arithmetic and logical unit c. Timing and control unit d. All of these

Description : Which is the components of microprocessor: a. Register unit b. Arithmetic and logical unit c. Timing and control unit d. All of these

Last Answer : d. All of these

System Bus Contains: a. Address Bus b. Data Bus c. Control Bus d. All of these

Description : System Bus Contains: a. Address Bus b. Data Bus c. Control Bus d. All of these

Last Answer : d. All of these

The ALU and control unit of most of the microcomputers are combined and manufacture on a single silicon chip. What is it called? a. monochip b. microprocessor c. ALU d. control unit

Description : The ALU and control unit of most of the microcomputers are combined and manufacture on a single silicon chip. What is it called? a. monochip b. microprocessor c. ALU d. control unit

Last Answer : b. microprocessor

What is the control unit's function in the CPU? a. To transfer data to primary storage b. to store program instruction c. to perform logic operations d. to decode program instruction

Description : What is the control unit's function in the CPU? a. To transfer data to primary storage b. to store program instruction c. to perform logic operations d. to decode program instruction

Last Answer : b. to store program instruction

Processors of all computers, whether micro, mini or mainframe must have a. ALU b. Primary Storage c. Control unit d. All of above

Description : Processors of all computers, whether micro, mini or mainframe must have a. ALU b. Primary Storage c. Control unit d. All of above

Last Answer : b. Primary Storage

The branch logic that provides decision making capabilities in the control unit is known as a. controlled transfer b. conditional transfer c. unconditional transfer d. none of above

Description : The branch logic that provides decision making capabilities in the control unit is known as a. controlled transfer b. conditional transfer c. unconditional transfer d. none of above

Last Answer : c. unconditional transfer

The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.A.control busB.control instructionsC. address decoder D.CPU

Description : The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.A.control busB.control instructionsC. address decoder D.CPU

Last Answer : C. address decoder

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

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

who is credited with the idea of using punch cards to control patterns of a weaving machine? a. Pascal b. Hollerith c. Babbage d. Jacquard

Description : who is credited with the idea of using punch cards to control patterns of a weaving machine? a. Pascal b. Hollerith c. Babbage d. Jacquard

Last Answer : d. Jacquard

The subject of cybernetics deals with the science of a. Genetics b. Control and communications c. Molecular biology d. Biochemistry

Description : The subject of cybernetics deals with the science of a. Genetics b. Control and communications c. Molecular biology d. Biochemistry

Last Answer : b. Control and communications

Which part of the computer is used for calculating and comparing? a. Disk unit b. Control unit c. ALU d. Modem

Description : Which part of the computer is used for calculating and comparing? a. Disk unit b. Control unit c. ALU d. Modem

Last Answer : c. ALU

The brain of any computer system is a. ALU b. Memory c. CPU d. Control unit

Description : The brain of any computer system is a. ALU b. Memory c. CPU d. Control unit

Last Answer : c. CPU