On The Theory of Interrupts

[Nathanmini]

Interrupts Fail!

First off, interrupts go through the nmi input on the cpu. That example code is for a nmi input of 32. If nothing goes through the nmi input, then it does nothing. Try giving the nmi input a 32 next time and see what happens.

lol i did put 32 into the nmi input and it still facked up on me

[InfectiousFight]

Hmm...so it appears then, that if I want an interrupt to be activated immediately when a certain button is pressed, there must be an outside device to check the button status and then deliver the interrupt through the NMI input?

[Azrael]

Hmm...so it appears then, that if I want an interrupt to be activated immediately when a certain button is pressed, there must be an outside device to check the button status and then deliver the interrupt through the NMI input?

Yes. Alternatively, you could wire the button up to the IOBus, check it in the CPU code, and call the interrupt from there.

[InfectiousFight]

Well obviously...but then the interrupt code wouldn't be executed until the program actually reached the point in execution where it checked the button. And then, how is that any different from a regular Call?

[Azrael]

Well obviously...but then the interrupt code wouldn't be executed until the program actually reached the point in execution where it checked the button. And then, how is that any different from a regular Call?

Touché.

[dnifan]

Well obviously...but then the interrupt code wouldn't be executed until the program actually reached the point in execution where it checked the button. And then, how is that any different from a regular Call?

And that's why you need a Non-masked interrupt. Alternative, is threading.

[Black Phoenix]

Interrupts have one advantage over calls: you don't need to know address of call method.

[MulleDK18]

mov edi,init_table// This is so we can do stuff inside the table

Shouldn't that be Int_Table and not InIt_Table ?

[Hitman271]

Shouldn't that be Int_Table and not InIt_Table ?

Fixed.

That keyboard example will have to come later, as I am busy with gpu projects at the moment.

[-=Fox=-]

I know this is a bit of a necro-post BUT! I've been trying to get interrupts to work and the above code compiles and doesn't appear to be working.

Did something change for the CPU?