Re: PCI Interrupts

[henrylau@cts.com (Henry Lau)]

At 10:16 AM 9/30/96 -0700, Tom Warren wrote:
>At 07:09 AM 9/26/96 PDT, you wrote:
>[stuff deleted]
>>
>>1.  I think I have put in the interrupt handler correctly at the right
>>    place, but it was never called.  What else could be wrong?
>>
>
>Did you unmask the slave PIC (8259) for IRQ 10? You need to clear bit 2,
>port A1h (IN AL, A1h; AND AL, 11111011B; OUT A1h, AL). Do this before
>installing your interrupt handler (ISR).
>
Yes I did.

>
>>4.  Can I probe on the motherboard somewhere to see if IRQ-10 is happening
>>    or not?
>>
>Sure. Hook a 'scope up to pin 6 on Side A of your card (six 'fingers' from
>the rear of the card, non-component side). If you want to pick up _your
>INTA#_ on an unused slot, this is where you'll need the PCI routing info
>table, to see which INTx# line is wired to your slots' INTA#.
>
I saw the signal at INTA# on the PCI Bus.  I want to probe to see if
the signal actually gets to IRQ-10 on the motherboard.

Thank you very much for your response.
+-----------------------------------------+----------------------------+
| Henry Lau                               | Phone: 619-674-5000 x222   |
| Director of Software Development        | Fax:   619-674-5005        |
| METACOMP, Inc.                          | Email: henrylau@cts.com    |
| 10989 Via Frontera, San Diego, CA 92127 | http://www.metacompinc.com |
+-----------------------------------------+----------------------------+
I¨•