Interrupt controller - debugging hints
Posted: Tue Sep 09, 2003 8:47 am
This is a debugging hint for those amonng us toying around with interrupts delivered by the slave interrupt controller:
If you unmask each interrupt you need, when you install the according driver, then you have all the other interrupts masked.
Be careful that you have unmasked at all times the irq-line on the master controller, which is responsible for the cascading with the slave controller. With this irq line masked you have no chance of receiving irq's from the slave controller.
I hope you find this hint helpful. I 've myself overlooked this and wondered why my mouse code didn't work... a shame it is really...
If you unmask each interrupt you need, when you install the according driver, then you have all the other interrupts masked.
Be careful that you have unmasked at all times the irq-line on the master controller, which is responsible for the cascading with the slave controller. With this irq line masked you have no chance of receiving irq's from the slave controller.
I hope you find this hint helpful. I 've myself overlooked this and wondered why my mouse code didn't work... a shame it is really...