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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 09:14:12 -0230
Organization:	Memorial University of Newfoundland
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DJ Delorie wrote:

>>is, using IRQ 0 (Timer) the counter increments as it should. But when I 
>>change the IRQ, to 5 or 7, and manually trigger multiple interrupts, the 
>>counter increments exactly once. What am i missing?
> 
> 
> Are you resetting the state of the hardware device?  It may just not
> be triggering the second interrupt.

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.

Is there something special I should do if I replace the existing IRS 
with my own?

Jason

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