Subject:
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IRQ and XIRQ pins on handyboard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 27 Jul 2001 23:13:34 GMT
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Viewed:
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1908 times
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Hello everybody,
Is it a reason why the IRQ pin of the 68HC11 is not available.
On the schema, seems that this pin is always up.
If I look in the pcode.asm, the interrupt vector for IRQ ($BFF2) is set to
RTI (BadInt)
So, if I need to link a device to the HB and intercept a signal from this
device (can be a device signaling when he is ready or something else...),
how can I do this.
Of course, I can make a loop or add a routine in the System Interrupt but it
is not really what I want to do.
Thanks in advance.
Jean Dufrasne
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