How to enable IRQ?

  • Thread starter Thread starter Ali
  • Start date Start date
A

Ali

Hi EveryOne,


Which bit of control register is required to set for enabling IRQ on
Intel machine XP.
 
The one on the left.
Click to expand...

Actually it's the one in the middle, bit 4 of register BASE+2.
However this won't work in XP because XP doesn't allow programs to access
registers directly, only drivers can access registers. Also only drivers can
have interrupt handlers, programs can't. The only way this can be made to work
is if you're using plain DOS or if you're writing a driver for XP or if you're
using some kind of special IO passthrough driver under XP.
Good luck.
--Tom.
 
Thanks,
You mean 17 pin of D Type Connector , right?
Click to expand...

No, pin 17 is the SELECT line which is an output. It IRQ is gnerated by the
ACK line which is an input and it's on pin 10.
--Tom.
 
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