The Design of Interrupt Controller Functional Demo of Visual Design
Abstract
The interruption is a important function in each computer system. Interruption is the solution of external equipment and systems is a good way to connect, it availably carried out exterior equipments and proceed together of CPU a work.In physically appliedly, in addition to want to consider how to break off a controller plait the distance carry on of problem, also want to break off a way to carry on I/O to control to the adoption of connect a people's electric circuit to carry on a design.The interruption is a kind of signal, it tells that the microprocessor has already taken place a certain demand specially notices of affairs, need a whereabouts reason or contribute efforts to it.We deeply understood the work method with 8259A in this topic, work principle and work condition;Knew to break off existent important meaning in the meantime, break off the popular comprehension can think to be a "abnormality", under the sistuation that have excrescent occurrence output circumstance, at two procedures which put in the at present thing to win election to choose to even need to immediately carry out to respond to, is in the interruption say of have the initiative class.Our usage weaves a distance technique, 8259A the chip imitate the display of true type to come out and use C++combine procedure structure, weave a distance to play to show it inner part of work mechanism.Make use of the design of procedure, pass the work principle of chip experiment terrace to everyone's a consciousness which keeps a view, make everyone to understand the mean of interruption more very clear..
Key words: 8259A;priority; state machine;visual; emulation
