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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.
What else can I help you with?
What does harware mean?
magic, obviouslyHarware & SoftwareYes. All harware need drivers to work with computers
What two basic part do computer consist of?
Harware & Software
Do printers need drivers?
Yes. All harware need drivers to work with computers.
What type of harware does an apple computer use?
The same hardware any Windows PC can use.
How do you remove rust from ceramic tile?
CLR its found at most harware stores. scouring stone
Is Linux harware or sofware?
Linux is a Software which interacts with hardware using device drivers and controls the hardware using kernel routines.
Where can you purchase a mousetrap car kit?
Go to your local harware store, or purchase one online. But it is easy to make one on your own too!
Is there anything commercially available that greatly intensifies pain?
your local harware store has many commercialy available items that can intensify and multiply pain
How can you play xbox games on an xbox 360?
only certain x-box games work on the x-box 360 for others you must download harware
What are some new hardwares in 2007?
many new harware have in the computer field . DDR2 RAM IS NEW that is diffrant to DDR-DDR2 natch is 2.5mm move in left on side
Where could I get a water purifier?
You can get a water purifier at any home appliance store or harware store. Many super stores will also have this item. You may also be able to find this online.
Where can I buy heating oil in Newport, RI?
You can purchase keosene heating oil at your local hardware store like Home Depot or Lowes. You can also try Newport Harware on Broadway.
