Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: Interrupts not being raised. | Date | 12 Feb 1999 20:23:39 GMT |
| |
Followup to: <E10BJOL-0000GF-00@devel2.axiom.internal> By author: David Woodhouse <David.Woodhouse@mvhi.com> In newsgroup: linux.dev.kernel > > I've now read setup.S, and can see where the PICs are reprogrammed to map > IRQ0-15 onto int 0x20-0x2f. So how does the PIC generate the correct INT? > Surely the CPU doesn't have that many external pins? >
The PIC puts the vector number on the data bus during the INTACK cycle.
-hpa -- "Linux is a very complete and sophisticated operating system. There are, and will be, large numbers of applications available for it." -- Paul Maritz, Group Vice President for Platforms And Applications, Microsoft Corporation [Reference at: http://www.kernel.org/~hpa/ms.html]
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |