Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!jarthur!nntp-server.caltech.edu!nntp-server.caltech.edu!trux From: trux@atop.atop.cs.caltech (Flem Snopes) Newsgroups: comp.sys.ibm.pc.hardware Subject: QUESTION ABOUT INTERRUPT REQUEST 7 Message-ID: Date: 7 Apr 91 15:51:33 GMT Sender: news@nntp-server.caltech.edu Distribution: comp Organization: California Institute of Technology Lines: 16 I want to use the acknowledge line on my paralell port to trigger interrupt 0Fh. I enable IRQ7 on the 8259 PIC, then I hook interrupt 0Fh. When I bring ACK low, the interrupt happens but when I bring ACK low again (after it going high for some time) the interrupt is not triggered. Is there some flag I need to set to let the 8259 Programmable Interrupt Controller know I am ready to deal with the next -ACK signal? Thanks. -trux -- **************************************************************** * Flem Snopes * * Dabney 1-58 " From childhood's hour I have not been * * Caltech As others were--I have not seen * * Pasadena, CA As others saw--I could not bring * * 91126 My passions from a common spring-- " * * 818-564-8011 * ****************************************************************