(1) single-pulse generator output as an interrupt request signal generated interrupt 8259A, enter the show after the interruption of a string. (2) interrupt request through the 8259 end of IRQ2 input, interrupt source can be a 8253-chip timer output pulse, and the 8253 bus OUTO and IR02 connected trough. (3) preparation of procedures, requirements for each host in response to external interrupt IRQ2, the display string THIS IS A 8259A INTERRUPT! (Or other strings), interruption of ten times, withdraw from the program.

Packet : 1052302918259zhongduankongzhiqi.rar filelist
8259zhongduankongzhiqi.doc

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