Hardware Interrupt: Each CPU has External Interrupt lines(about 7). Other external devices line keyboard, Mouse, Other controllers can send signals to CPU asynchronously. Software Interrupt:is an interrupt generated with in a processor by executing an instruction . Software interrupt are often used to implemented system calls because they implemented a subroutine call with a CPU ring level change.
I'm not too sure what exactly you are referring to.
But a hardware interrupt is probably an error with something physical for example, a broken harddrive or faulty motherboard.
and a software interrupt would be a problem with a program or game on a computer.
hope this answered your questions :)
A hardware interrupt on an 8085 is generated by something in hardware, such as a pulse on RST 6.5. This generates a CALL with FLAGS sequence that interrupts the instruction stream to go process the interrupt. A software interrupt has the same result, but the initiating event is the RST instruction in the program.
'Software interrupts' are actually supervisor-calls (eg: open a file, allocate memory) or traps (eg: page fault, division by zero).
hardware interrupt is when software makes hardware input to be on standby,software interrupt is when programme is running and making other command to wait for sometime
The difference is that a hardware interrupt is a signal relayed to a system's CPU directly because of some piece of hardware, such as a keyboard or mouse. A software interrupt is a signal sent to indicate that something within a piece of software requires attention.
(Q)What are Hardware and software interrupt? draw the block daigram of 8259 interrupt controller and explain in brief..
There are 2 types interrupts in 8085 such as: 1)hardware interrupt 2)software interrupt
A hardware interrupt is initiated from a hardware event, such as a byte received from a serial port. It is asynchronous to the running program, i.e. it can occur at any time. An internal, or software, interrupt is initiated by the running program, thus it is under the control of the running program. In the 8085, for instance, the RST instructions are software interrupts. Note, however, that external interrupts can initiate a software RST instruction, so the two events can appear to be the same kind of event. The biggest difference is the handling of the interrupt enable (IE) flag. In the hardware interrupt, the IE flag is turned off when processing the interrupt, and it is turned on right before the interrupt service routine executes the final return instruction. The software interrupt, on the other hand, has nothing to do with IE. As a result, the code must be able to tell the difference.
Those would be software interrupts. Interrupts initiated by the hardware would be hardware interrupts. While the socket a mouse is plugged into would use a hardware interrupt, a mouse driver would use a software interrupt.
The TRAP interrupt can not be masked by software, unless there is hardware in place to allow that, perhaps by anding an output bit with the TRAP request line.
Interrupt signals initiated by programs are called software interrupts. A software interrupt is also called a trap or anexception. A signal informing a program that an event has occurred. When a program receives an interrupt signal, it takes a specified action (which can be to ignore the signal). Interrupt signals can cause a program to suspend itself temporarily to service the interrupt. Interrupt signals can come from a variety of sources. For example, every keystroke generates an interrupt signal. Interrupts can also be generated by other devices, such as a printer , to indicate that some event has occurred. PCs support 256 types of software interrupts and 15 hardware interrupts. Each type of software interrupt is associated with an interrupt handler -- a routine that takes control when the interrupt occurs. For example, when you press a key on your keyboard, this triggers a specific interrupt handler. The complete list of interrupts and associated interrupt handlers is stored in a table called the interrupt vector table , which resides in the first 1 K of addressable memory.
An interrupt is a mechanism for hardware of software to interrupt the processor to go do something else. Playing music is a much higher level abstraction, and it is not valid to ask what is the interrupt to play music, partly because it depends on the specific hardware implementation.
The peripheral with the highest interrupt priority depends on the hardware and software design of the particular system. In the 8085, the TRAP interrupt has the highest priority. The peripheral connected to TRAP is your choice.
Interrupt acknowledge is the process of acknowledging a hardware interrupt, obtaining an interrupt vector address, and initiating the interrupt service routine in software. The INTA- (Interrupt Acknowledge) pin has the same timing as RD-, and external hardware is expected to provide an opcode in response to it. In the case of TRAP, RST7.5, RST6.5, and RST5.5, there is no specific interrupt acknowledge cycle like there is for INTR, but everything else is the same.
The first is the real interrupt, when the external hardware interrupts the processors' work;the second is the exception, like page fault or division by zero;the third is the supervisor call (SVC) which is sometimes called interrupt (or 'software interrupt') as well.
Interrupts are required in order to get the attention of the CPU. A CPU typically has two interrupt lines. One is the nonmaskable interrupt line (NMI). That is used in the case of critical errors, since this interrupt cannot be ignored. The other one is the regular interrupt line. That is used by hardware devices and certain software to get the attention of the CPU. When you move a mouse, for instance, that creates both a hardware and software interrupt. So the CPU would then process the mouse driver code and move the cursor, then get back to what it was doing.