about interrupts

flat assembler
Message board for the users of flat assembler.

Index > Main > about interrupts

Author

Thread

b1528932

Joined: 21 May 2010
Posts: 287

b1528932 25 Jun 2010, 20:36

when hardware send interrupt to cpu, while cpu has if = 0, what is happening to this interrupt? does the hardware gets 'error, send again' and must send it again untill its recived, or cpu is saving this information osmewere?

25 Jun 2010, 20:36

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20423
Location: In your JS exploiting you and your system

revolution 25 Jun 2010, 23:18

The (A)PIC will hold all interrupts to the CPU until they are acknowledged. So as soon as IF is enabled the CPU will branch to the pending interrupt routine.

25 Jun 2010, 23:18

DOS386

Joined: 08 Dec 2006
Posts: 1903

DOS386 27 Jun 2010, 10:49

> The (A)PIC will hold all interrupts to the CPU until

Same for PIC and APIC ?

27 Jun 2010, 10:49

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20423
Location: In your JS exploiting you and your system

revolution 27 Jun 2010, 10:54

DOS386 wrote:

> The (A)PIC will hold all interrupts to the CPU until

Same for PIC and APIC ?

AFAIK Yes. I never lost an interrupt in any of my old code using the PIC.

27 Jun 2010, 10:54

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum