keyboard irq only firing once (sending EOI)

[erwinm]

Hey guys,

I am a beginner, setting up a hobby OS. I am running into a weird problem to which I can't seem to find the solution. My keyboard interrupt only fires once.

This is what does work:
- timer interrupts are firing, before and after the single kbd irq
- system calls are working as well

To me that is saying I got my IDT setup correctly. I am sending 'end of interrupt' after the keyboard handler returns..

What am I missing here?

Thanks a lot,
Erwin

[gerryg400]

Are you reading the key from within the handler ?

[erwinm]

Nope,

I am only printing a string to see if the handler is firing. And it is doing so only once.

[gerryg400]

That's most likely your problem. Until you read the key the controller doesn't know that you've serviced the interrupt. Just do an inportb(0x60) from within your ISR and see what happens.

[erwinm]

That was it! Thx a lot!