彻底糊涂了

9054的LINT#和INTA#都是低有效，而看了一下windriver的user\'s guide，里面有这样一句话：
Level sensitive interrupts are generated as long as the physical interrupt signal is high. If the interrupt signal is not lowered by the end of the interrupt handling by the kernel, the Windows OS will call the WinDriver kernel interrupt handler again - This will cause the PC to hang!

怎么中断变成高有效了！？

High triggled interrupt applies to 80X86 CPU. You must use an inverter to get the low triggled signal to high triggled.