From: "Martin Czamai" Newsgroups: comp.os.msdos.djgpp Subject: Programming Hardware Interrupts Date: Thu, 21 Oct 1999 16:57:56 +0200 Organization: callisto germany.net GmbH Lines: 27 Message-ID: <7una0o$t17$1@news.germany.net> NNTP-Posting-Host: 151.189.115.98 X-Trace: news.germany.net 940518232 29735 151.189.115.98 (21 Oct 1999 15:03:52 GMT) X-Complaints-To: news AT germany DOT net NNTP-Posting-Date: 21 Oct 1999 15:03:52 GMT X-Newsreader: Microsoft Outlook Express 5.00.2314.1300 X-MSMail-Priority: Normal X-Priority: 3 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com 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)