> In my 16F628 program I call a subroutine that waits for an event to
happen.
> If the event does not happen within a certain length of time can I use a
> goto instruction to restart the program from a known point, without using
a
> return instruction to pop the return address back off the stack ?

Yes.  I've done this.  In one case I used the RB0 interrupt as an externally
forced GOTO 4.

> I know this will cause a stack underflow(?)

Overflow, actually, but that is only from the debugger's point of view.

> condition, but since the stack
> is a circular buffer surely it won't matter because subsequent calls will
> have the required return to go with them

Right.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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