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From: | Jason Mills <jmills AT cs DOT mun DOT ca> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Interrupt Handler Hanging? |
Date: | Thu, 21 Oct 2004 10:43:17 -0230 |
Organization: | Memorial University of Newfoundland |
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Jason Mills wrote: > I will double check the hardware documentation to see if resetting is > necessary. However, the relevant IRQ status bit in the status register > does indicate other interrupts (after the first) are being trigger. > > Should I somehow (?) acknowledge when the interrupt handler is done?? I > notice some people return 0 at the end of the handler. After browsing the newsgroup a bit more, and with some experimentation, I discovered I need to ack the handler using outb(0x20, 0x20). It seems to work fine now. I will do more testing to make sure. > Is there something special I should do if I replace the existing IRS > with my own? > > Jason >
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