From:	"Martin Czamai" <Martin_Czamai AT peak-service DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Programming Hardware Interrupts
Date:	Thu, 21 Oct 1999 16:57:56 +0200
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To:	djgpp AT delorie DOT com
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Hi all again!

I'm trying to program a short test-programm for a PCI device. The PCI
controller gives me the correct data from the sub-device, which is an other,
external controller. The interrupt-flags are reseted correct on both
devices, but my interrupt serivce routine (ISR) works only once per booting
:-(((
My ISR consists the following parts:
* read interrupt control register of the PCI controller to determine the
reason for the interrupt
* read the data from the corresponding external controller (this is not a
PCI controller!)
* reset interrupt flags from external controller
* reset interrupt flags from PCI controller
* send EOI to system interrupt controller

In the main-part of the program I display the data I received (once) during
the ISR. A global dummy counter variable tells me how often the ISR was
called.
Who has any tip to get started?? Thank you for your help and

best regards

Martin Czamai
(Martin_Czamai AT peak-service DOT com)

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