Admin Table of Contents
- 1 What is interrupt-driven transfer?
- 2 What are types of interrupts?
- 3 How does interrupt driven data transfer differ from programmed driven data transfer?
- 4 How are interrupts implemented?
- 5 What is the interrupt driven I/O data transfer method?
- 6 What are the different ways of data transfer to and from peripherals?
What is interrupt-driven transfer?
In the interrupt-driven data transfer scheme, the 8085 executes about 500,000 useful instructions, by the time at which a key is pressed at the keyboard by the user. This results sending of an interrupt signal to the 8085 by the Input Output port.
What are the 3 I O techniques for data transfer?
There are three principal I/O techniques: programmed I/O, in which I/O occurs under he direct and continuous control of the program requesting the I/O operation; interrupt-driven I/O, in which a program issues an I/O command and then continues to execute, until it is interrupted by the I/O hardware to signal the end of …
What are types of interrupts?
Types of Interrupt
- Hardware Interrupts. An electronic signal sent from an external device or hardware to communicate with the processor indicating that it requires immediate attention.
- Software Interrupts.
- Level-triggered Interrupt.
- Edge-triggered Interrupt.
- Shared Interrupt Requests (IRQs)
- Hybrid.
- Message–Signalled.
- Doorbell.
What are the steps followed whenever a software interrupt instruction INT executes?
INTR
- First completes the current instruction.
- Activates INTA output and receives the interrupt type, say X.
- Flag register value, CS value of the return address and IP value of the return address are pushed on to the stack.
- IP value is loaded from the contents of word location X × 4.
How does interrupt driven data transfer differ from programmed driven data transfer?
An input instruction is required to store the data from the device to the CPU and a store instruction is required to transfer the data from the CPU to the device….Difference between Programmed and Interrupt Initiated I/O :
| Programmed I/O | Interrupt Initiated I/O |
|---|---|
| Its module is treated as a slow module. | Its module is faster than programmed I/O module. |
What is an important data transfer technique?
Answer: (b) DMA. DMA stands for Direct Memory Access. In the DMA data transfer scheme, data is directly transferred from an I/O device to RAM or from RAM to an I/O device.
How are interrupts implemented?
Internally, hardware interrupts are implemented using electronic alerting signals that are sent to the processor from an external device, which is either a part of the computer itself, such as a disk controller, or an external peripheral. The act of initiating a hardware interrupt is referred to as an interrupt (IRQ).
What are the sources of interrupt?
There are many sources for interrupts varying from simply asserting an external pin to error conditions within the processor that require immediate attention.
- Internal interrupts.
- External interrupts.
- Exceptions.
- Software interrupts.
- Non-maskable interrupts.
What is the interrupt driven I/O data transfer method?
The interrupt driven I/O data transfer method is very efficient. Because no microprocessor time is wasted in waiting for an I/O device to be ready. After checking the I/O device is ready or not. In this interrupt driven I/O data transfer method, the I/O device informs the microprocessor for the data transfer.
How does the 8085 interrupt-driven data transfer work?
In the interrupt-driven data transfer scheme, the 8085 executes about 500,000 useful instructions, by the time at which a key is pressed at the keyboard by the user. This results sending of an interrupt signal to the 8085 by the Input Output port.
What are the different ways of data transfer to and from peripherals?
Data transfer to and from the peripherals may be done in any of the three possible ways Programmed I/O. Interrupt- initiated I/O. Direct memory access ( DMA). Now let’s discuss each mode one by one. Programmed I/O: It is due to the result of the I/O instructions that are written in the computer program.
What are the different modes of I/O data transfer?
Data transfer between CPU and the I/O devices may be done in different modes. Data transfer to and from the peripherals may be done in any of the three possible ways Programmed I/O. Interrupt- initiated I/O. Direct memory access ( DMA).