Hi,
I see at this moment only one possible cause: the processor does a reset
somehow after 1st press (previous word reset is a typo; sorry). Maybe a
watchdog or an EMI problem?

Regards,
Imre


On Fri, 22 Sep 2000, Carl Rouse wrote:

> Hi all,
>         got a bit of an annoying problem.
>
> I've cleared INTCON, and therefore GIE, so interupts should be disabled.
> Yet, when I press a switch on PORTB, 6 the first time it behaves as it
> should, but the second and subsequent times result in a jump to the
> interrupt handling routine at 0x004.
> I've added a routine to send data out about the state of certain registers
> to the interrupt handling routine and INTCON is
> '00000000' on the second press (first jump to 0x004),
> '10000000' on third press (second jump to 0x004).
> RETFIE sets GIE on execution, so that is why GIE is set on the second
> interrupt call, but GIE is '0' when the first jump to 0x004 is made.
> PIR1 is '00010000' which is TXREG is empty
> PIR2 is '00000000'
>
> Has anyone out there come across something like this before?
> Does anyone have any ideas on what I can look at?
>
> Thanks,
>             -Carl
>
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